Kereskedelmi, irodai és ipari

Dimension drawing
Principle reference diagram
Product Description
Pin description
1. VDD 3.3 ~ 5.5V DC
2. GND, ground, negative pole of power
3. SDA serial data, two-way port
4. SCL serial clock, input port
Technical Parameters:
1. Humidity measurement range: 0 ~ 100% RH
2. Humidity measurement accuracy: ± 2% RH
3. Temperature measurement range: -40 ~ 125 ℃
4. Temperature measurement accuracy: ± 0.2 ℃
5. Working voltage: 3.3 ~ 5VDC
6.I2C interface output
Application:
HVAC, dehumidifiers, agriculture, cold chain storage, testing and testing equipment, consumer products, automobiles, automatic control, data loggers, weather stations, home appliances, humidity regulators, medical, and other related humidity detection and control.

Dimension drawing
Principle reference diagram
Product Description
Pin description
1. VDD 3.3 ~ 5.5V DC
2. GND, ground, negative pole of power
3. SDA serial data, two-way port
4. SCL serial clock, input port
Technical Parameters:
1. Humidity measurement range: 0 ~ 100% RH
2. Humidity measurement accuracy: ± 2% RH
3. Temperature measurement range: -40 ~ 125 ℃
4. Temperature measurement accuracy: ± 0.2 ℃
5. Working voltage: 3.3 ~ 5VDC
6.I2C interface output
Application:
HVAC, dehumidifiers, agriculture, cold chain storage, testing and testing equipment, consumer products, automobiles, automatic control, data loggers, weather stations, home appliances, humidity regulators, medical, and other related humidity detection and control.

Product Description
Power supply:3v-5v
MMA8452 module, high-precision tilt sensor module 14BIT-digit
Mounting hole diameter: 3mm
Pitch: 15mm
Size: Approx. 14.5mm x 20.5 mm /0.57''x0.80''
Package Included:
1 x GY-45 MMA8452 Digital Triaxial Accelerometer Tilt Sensor Module

BMP180
Description:
Measuring the absolute pressure of the enviroment using a digital barometer such as this has some interesting applications. By converting the pressure measured into altitude, you have a reliable sensor for determining the height of your robot, plane .
Using a sensor as capable as the BMP180 you can achieve accurary of 1m, with noise of only 17cm in ultra high resolution noise. The device will operate at only 0.3uA meaning low current draw for battery powered applications.
The BMP180 comes fully calibrated and ready to use. As the device operates over I2C we've added optional I2C pull ups that can be enabled using the PU (pull up) jumper on the board for your convenience and ease during breadboarding.
Using I2C, the device provides pressure and temperature as 16bit values, which are used along with calibration data within the device are used to provide a temperature compensated altitude calculation.

Features:

1.8V to 3.6V Supply Voltage
Low power consumption - 0.5uA at 1Hz
I2C interface
Max I2C Speed: 3.5Mhz
Very low noise - up to 0.02hPa (17cm)
Full calibrated
Pressure Range: 300hPa to 1100hPa ( 9000m to -500m)
Weight: 1.18g
Size: 21mm x 18mm
BMP280
has stepped up their game with their new BMP280 sensor, an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183. This sensor is great for all sorts of weather sensing and can even be used in both I2C and SPI!
This precision sensor is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy

Typical application:
Enhancement of GPS navigation
e.g.time-to-first-fix improvement,dead-reckoning,slope detection
Indoor navigation(floor detection,elevator detection)
Outdoor navigation,leisure and sports applications
Weather forecast
Health care application(e.g. sirometry)
Vertical velocity indication(e.g. risk/sink speed)
Target devices
Handsets such as mobile phones ,table PCs,GPS devices
Navigation systems
Portable health caredevices
Home weather stations
Flying toys
Watches
PCB size:(L*W)1.52* 1.20cm/0.60"*0.47"

BMP180
Description:
Measuring the absolute pressure of the enviroment using a digital barometer such as this has some interesting applications. By converting the pressure measured into altitude, you have a reliable sensor for determining the height of your robot, plane .
Using a sensor as capable as the BMP180 you can achieve accurary of 1m, with noise of only 17cm in ultra high resolution noise. The device will operate at only 0.3uA meaning low current draw for battery powered applications.
The BMP180 comes fully calibrated and ready to use. As the device operates over I2C we've added optional I2C pull ups that can be enabled using the PU (pull up) jumper on the board for your convenience and ease during breadboarding.
Using I2C, the device provides pressure and temperature as 16bit values, which are used along with calibration data within the device are used to provide a temperature compensated altitude calculation.

Features:

1.8V to 3.6V Supply Voltage
Low power consumption - 0.5uA at 1Hz
I2C interface
Max I2C Speed: 3.5Mhz
Very low noise - up to 0.02hPa (17cm)
Full calibrated
Pressure Range: 300hPa to 1100hPa ( 9000m to -500m)
Weight: 1.18g
Size: 21mm x 18mm
BMP280
has stepped up their game with their new BMP280 sensor, an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183. This sensor is great for all sorts of weather sensing and can even be used in both I2C and SPI!
This precision sensor is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy

Typical application:
Enhancement of GPS navigation
e.g.time-to-first-fix improvement,dead-reckoning,slope detection
Indoor navigation(floor detection,elevator detection)
Outdoor navigation,leisure and sports applications
Weather forecast
Health care application(e.g. sirometry)
Vertical velocity indication(e.g. risk/sink speed)
Target devices
Handsets such as mobile phones ,table PCs,GPS devices
Navigation systems
Portable health caredevices
Home weather stations
Flying toys
Watches
PCB size:(L*W)1.52* 1.20cm/0.60"*0.47"

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Disclaimer:
100% brand new and high quality
Knock sensor module and a digital 13 interface, built-in LED build a simple circuit to produce percussion flasher. Interface comes with digital LED, will knock sensor connected digital 3 interface, when percussion sensor senses measure to percussive signals, LED flashing light.
Size: 30x18x6mm (approx)
Routines source code:
int Led = 13;// define LED Interface
int Shock = 3;// define the percussion Sensor Interface
int val;// define numeric variables val
void setup ()
{
pinMode (Led, OUTPUT) ;// define LED as output interface
pinMode (Shock, INPUT) ;// define knock sensor output interface
}
void loop ()
{
val = digitalRead (Shock) ;// read digital interface is assigned a value of 3 val
if (val == HIGH) // When the percussion when the sensor detects a signal, LED flashes
{
digitalWrite(Led, LOW);
}
else
{
digitalWrite(Led, HIGH);
}
}

LilyPad Coin Cell Battery Holder Module
This LilyPad Coin Cell Battery Holder has a small slide switch installed on the board, in-line with the power so you can shut off your project and save batteries. This slide switch is the same as is found on the LilyPad slide switch board, so it's not easy to accidentally turn off or on.
Just like the original Coin Cell Battery Holder, this simple board holds a 20mm coin cell battery (such as a CR2032) and gives you 4 connection points (two positive and two negative) for sewing into your project.
1×LilyPad Coin Cell Battery Holder Module

Product Description
DC-DC 9V/12V/24V to 5V Step Down Charger Power Module 3A Output USB Car Charging Regulator Buck Voltage Board
Descriptions:
A switching step-down DC-DC converter module;
Fixed switching frequency 150KHz, the chip has excellent linearity adjustment and load regulation, fixed output 5V.
The chip integrates reliability modules such as overcurrent protection, overtemperature protection, and short circuit shutdown.
Specifications:
Input: 5V-36V
Output: 5V/3A
Conversion Efficiency: 96%
Switching Frequency: 150KHz
Working Temperature: -40°C- 85°C
Load Capacity: Maximum Output 3A, Long-Term Work 2A
Product Size: 38 X 16 X 5mm/1.5 X 0.63 X 0.2"
Packing Weight: 6g
Scope of Application: USB 5V powered devices such as mobile power, mobile phones, and tablets
Notes:
1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
2. Please allow 1-3mm measuring deviation due to manual measurement.

Features:
100% Brand new and high quality.
Material: Electronic components PCB
Size: About 31 * 19 * 29mm / 1.22" * 0.75" * 1.14"
Main color: Black
Working voltage: 5V
Pulse circle: 20
By rotating the rotary encoder can be counted in the positive direction and the reverse direction during rotation of the output pulse frequency, unlike rotary potentiometer count, this rotation counts are not limited. With the buttons on the rotary encoder can be reset to its initial state, that starts counting from 0.


Package Included:


1 x Rotary Encoder Module Brick Sensor Development Board

Product Description
This module absolutely adopts original imported chips, and the performance is very good. You can easily get ±12V voltage as long as you have a 3V~5V battery (lithium battery, Ni-MH battery, etc.).
Ultra-small size and easy to install.

Module parameters:
Input voltage range: 2.8V~5.5V
Output voltage: ±12V (V is 12V, V- is -12V)
Output current: 12V can stably output 50ma current capacity, -12V
Stable output current capacity of 30ma, almost meets all
ADC, DAC and amplifier applications.
Size: 2.4*1.2CM
Application: This module can be used as a power supply for ADC, DAC or amplifier, etc.
Electricity. It cannot be used as a power supply for high-power loads.

Note: Due to the voltage divider effect of the diode, the -12V power supply is 0.4-0.6V lower than the 12V power supply.

This module is not a power type, do not connect to a high-power load.

Description
Current :13-26mA / DC 3.3V
Idle Current :10-13mA / DC 3.3V
Sleep current: <80uA
Peak current: <30mA
Operating Frequency: 13.56MHz
Supported card types: S50, S70, UltraLight, Pro, Desfire
Product Physical Characteristics: Dimensions: 40mm × 60mm
Environmental Operating temperature: -20-80 degrees Celsius
Environment Storage temperature: -40-85 degrees Celsius
Relative Humidity: 5% -95%
Data Transfer Rate: Max. 10Mbit / s

Introduction
Durable and easy to install
Very convenient and practical
Very popular among the electronic lovers
Very easy to adjust voltage and electric current
Come with cap,very easy to use
Model Number:
B1K 2K 5K 10K 20K 50K 100K 250K 500K 1M Shaft WH148 Potentiometer each 1pc
Note:The color of the cap is sent randomly

ACS712ELCTR-5A
The original chip ACS712ELCTR-05B power supply 5v.
It can measure positive and negative 5 amp current.
Corresponding analog output: 185mV/A
0 current output is the power supply midpoint voltage isolation type.
The default delivery is to match the terminal block, but the terminal block is not soldered.
ACS712ELCTR-20A
Using the original ACS712ELCTR-20A chip, it can measure positive and negative 20 amp current, corresponding to analog output is 100mV/A, when the current is zero, the output is the midpoint voltage of the power supply. The default delivery is to match the terminal block, but the terminal block is not soldered.
Product parameters:
Operating voltage 5 V
Working current 10mA
Interface output voltage 100mV/A
Working temperature -40° ~ 85°
ACS712ELCTR-30A
Product parameters:
Working voltage: 5v
Measuring range: 30A current
Corresponding analog output: 66mV/A [0 current output is the midpoint voltage of the power supply, isolated type]
The default delivery is to match the terminal block, but the terminal block is not soldered.
Package include
1pcs ACS712 Module（The current is sent according to the options）

Introduction
2004 20X4 Character LCD Display Module Blue/Yellow Green Backlight.
Condition: brand new
Blue/Yellow Green backlight
Fully assembled and tested Serial LCD 20x4 Module
Display Format: 20 Characters x 4 lines
Supply voltage: 5V
The module can be easily interfaced with a MCU
The module is a low-power consumption character LCD Module with a built-in controller

Introduction
2004 20X4 Character LCD Display Module Blue/Yellow Green Backlight.
Condition: brand new
Blue/Yellow Green backlight
Fully assembled and tested Serial LCD 20x4 Module
Display Format: 20 Characters x 4 lines
Supply voltage: 5V
The module can be easily interfaced with a MCU
The module is a low-power consumption character LCD Module with a built-in controller

Introduction
2004 20X4 Character LCD Display Module Blue/Yellow Green Backlight.
Condition: brand new
Blue/Yellow Green backlight
Fully assembled and tested Serial LCD 20x4 Module
Display Format: 20 Characters x 4 lines
Supply voltage: 5V
The module can be easily interfaced with a MCU
The module is a low-power consumption character LCD Module with a built-in controller

Introduction
2004 20X4 Character LCD Display Module Blue/Yellow Green Backlight.
Condition: brand new
Blue/Yellow Green backlight
Fully assembled and tested Serial LCD 20x4 Module
Display Format: 20 Characters x 4 lines
Supply voltage: 5V
The module can be easily interfaced with a MCU
The module is a low-power consumption character LCD Module with a built-in controller

Description
1. Working voltage: 5V 2. Suitable for 3.3V xbee, Bluetooh Bee, WPM wireless download module 3. With high baud rate transmission, stable and reliable performance Usage introduction Purpose 1: The PC is directly connected to the XBee adapter through the USB cable Use 2: Bluetooth Bee for configuration or as a data transmission Use 3: ARDUINO PRO MINI downloader

Product Description
Infrared distance measurement module
Model: GY - VL53L0X
Using the chip: VL53L0X
Power supply: 2.8 to 5V
Ranging time: <30ms
Operating mode: Power consumption 20mW
Standby power consumption: 5μA
Distance: <2 meters
Communication: the IIC communication protocol (fully compatible with 3-5 v system)
PCB size: about 13.3x10.5mm/0.51"x0.43"
No Retail Packages
Application:
wall detection, cliff detection, collision detection
sweeping robots
faucet, soap dispenser, Dry cell phone
unmanned aerial vehicles, IoT products.

Product Description
Infrared distance measurement module
Model: GY - VL53L0X
Using the chip: VL53L0X
Power supply: 2.8 to 5V
Ranging time: <30ms
Operating mode: Power consumption 20mW
Standby power consumption: 5μA
Distance: <2 meters
Communication: the IIC communication protocol (fully compatible with 3-5 v system)
PCB size: about 13.3x10.5mm/0.51"x0.43"
No Retail Packages
Application:
wall detection, cliff detection, collision detection
sweeping robots
faucet, soap dispenser, Dry cell phone
unmanned aerial vehicles, IoT products.

Description
LCR-T4
Description:
1.2020 latest M328 version of the software ,more functions.Chip: Atmega328
2.128*64 big Backlight LCD display,only 2mA when stand by.
3,Using 9V battery (Not included)
Test ranges:
Inductors, capacitors , diodes, dual diode , mos, transistor, SCR , the regulator, LED tube , ESR,
Resistance,Adjustable potentiometer
Resistance :0.1 ohm resolution, maximum 50M ohm
Capacitor :25pf -100,000 uf
Inductors : 0.01mh-20H
NEW Function:
1:Automatic detection of NPN and PNP transistors, n-channel and p-channel MOSFET, diode (including double diode), thyristor, transistor, resistor and capacitor and other components
2: Automatic test the pin of a component, and display on the LCD
3:Can detect the transistor, MOSFET protection diode amplification coefficient and the base to determine the emitter transistor forward biased voltage
4: Measure the gate and gate capacitance of the MOSFET threshold voltage
5:Use 12864 liquid crystal display with green backlight
Specifications: For you reference
1,One -button operation, automatic shutdown .
2,Only 20nA shutdown current.
3,Automatically detect NPN, PNP bipolar transistors , N -channel and P -channel MOS FET, JFET , diodes , two diodes, thyristors small power unidirectional and bidirectional thyristor.
4,Automatic identification components pin arrangement .
5,Measuring bipolar transistor current amplification factor and base - emitter threshold voltage.
6,Via the base - emitter threshold voltage and high current amplification factor to identify Darlington transistors.
7,Can detect bipolar transistors and MOS transistors protection diodes.
8,Measuring the gate MOS FET threshold voltage and the gate capacitance.
9,Can simultaneously measure two resistors and resistor symbol is displayed. Displayed on the right with a decimal value of 4 . Resistance symbol on both sides shows the pin number. So you can measure the potentiometer. If the potentiometer wiper is not transferred to an extreme position , we can distinguish the middle and both ends of the pin.
10,Resistance measurement resolution is 0.1 ohms , 50M ohms can be measured .
11,Can measure capacitanceCan measure capacitance of 30pF-100mF , resolution 1pF.
12.2uF more capacitors can simultaneously measure the equivalent series resistance ESR values. The two can be displayed with a decimal value , resolution 0.01 ohms.
13,Can be in the correct order and the diode symbol display two diodes , and gives the diode forward voltage.
14.LED is detected as a diode forward voltage higher . Combo of the LED is identified as two diodes.
15,Eeverse breakdown voltage is less than 4.5V Zener diode can be identified.
16,Can measure a single diode reverse capacitance. If the bipolar transistor connected to the base and collector or emitter of a pin , it can measure the collector or emitter junction reverse capacitance .
18 can be obtained with a single measurement rectifier bridge connection.
Notice: Before measuring capacitance , the capacitor must be discharged , otherwise very likely damage the meter .

Description
LCR-T4
Description:
1.2020 latest M328 version of the software ,more functions.Chip: Atmega328
2.128*64 big Backlight LCD display,only 2mA when stand by.
3,Using 9V battery (Not included)
Test ranges:
Inductors, capacitors , diodes, dual diode , mos, transistor, SCR , the regulator, LED tube , ESR,
Resistance,Adjustable potentiometer
Resistance :0.1 ohm resolution, maximum 50M ohm
Capacitor :25pf -100,000 uf
Inductors : 0.01mh-20H
NEW Function:
1:Automatic detection of NPN and PNP transistors, n-channel and p-channel MOSFET, diode (including double diode), thyristor, transistor, resistor and capacitor and other components
2: Automatic test the pin of a component, and display on the LCD
3:Can detect the transistor, MOSFET protection diode amplification coefficient and the base to determine the emitter transistor forward biased voltage
4: Measure the gate and gate capacitance of the MOSFET threshold voltage
5:Use 12864 liquid crystal display with green backlight
Specifications: For you reference
1,One -button operation, automatic shutdown .
2,Only 20nA shutdown current.
3,Automatically detect NPN, PNP bipolar transistors , N -channel and P -channel MOS FET, JFET , diodes , two diodes, thyristors small power unidirectional and bidirectional thyristor.
4,Automatic identification components pin arrangement .
5,Measuring bipolar transistor current amplification factor and base - emitter threshold voltage.
6,Via the base - emitter threshold voltage and high current amplification factor to identify Darlington transistors.
7,Can detect bipolar transistors and MOS transistors protection diodes.
8,Measuring the gate MOS FET threshold voltage and the gate capacitance.
9,Can simultaneously measure two resistors and resistor symbol is displayed. Displayed on the right with a decimal value of 4 . Resistance symbol on both sides shows the pin number. So you can measure the potentiometer. If the potentiometer wiper is not transferred to an extreme position , we can distinguish the middle and both ends of the pin.
10,Resistance measurement resolution is 0.1 ohms , 50M ohms can be measured .
11,Can measure capacitanceCan measure capacitance of 30pF-100mF , resolution 1pF.
12.2uF more capacitors can simultaneously measure the equivalent series resistance ESR values. The two can be displayed with a decimal value , resolution 0.01 ohms.
13,Can be in the correct order and the diode symbol display two diodes , and gives the diode forward voltage.
14.LED is detected as a diode forward voltage higher . Combo of the LED is identified as two diodes.
15,Eeverse breakdown voltage is less than 4.5V Zener diode can be identified.
16,Can measure a single diode reverse capacitance. If the bipolar transistor connected to the base and collector or emitter of a pin , it can measure the collector or emitter junction reverse capacitance .
18 can be obtained with a single measurement rectifier bridge connection.
Notice: Before measuring capacitance , the capacitor must be discharged , otherwise very likely damage the meter .

Description
LCR-T4
Description:
1.2020 latest M328 version of the software ,more functions.Chip: Atmega328
2.128*64 big Backlight LCD display,only 2mA when stand by.
3,Using 9V battery (Not included)
Test ranges:
Inductors, capacitors , diodes, dual diode , mos, transistor, SCR , the regulator, LED tube , ESR,
Resistance,Adjustable potentiometer
Resistance :0.1 ohm resolution, maximum 50M ohm
Capacitor :25pf -100,000 uf
Inductors : 0.01mh-20H
NEW Function:
1:Automatic detection of NPN and PNP transistors, n-channel and p-channel MOSFET, diode (including double diode), thyristor, transistor, resistor and capacitor and other components
2: Automatic test the pin of a component, and display on the LCD
3:Can detect the transistor, MOSFET protection diode amplification coefficient and the base to determine the emitter transistor forward biased voltage
4: Measure the gate and gate capacitance of the MOSFET threshold voltage
5:Use 12864 liquid crystal display with green backlight
Specifications: For you reference
1,One -button operation, automatic shutdown .
2,Only 20nA shutdown current.
3,Automatically detect NPN, PNP bipolar transistors , N -channel and P -channel MOS FET, JFET , diodes , two diodes, thyristors small power unidirectional and bidirectional thyristor.
4,Automatic identification components pin arrangement .
5,Measuring bipolar transistor current amplification factor and base - emitter threshold voltage.
6,Via the base - emitter threshold voltage and high current amplification factor to identify Darlington transistors.
7,Can detect bipolar transistors and MOS transistors protection diodes.
8,Measuring the gate MOS FET threshold voltage and the gate capacitance.
9,Can simultaneously measure two resistors and resistor symbol is displayed. Displayed on the right with a decimal value of 4 . Resistance symbol on both sides shows the pin number. So you can measure the potentiometer. If the potentiometer wiper is not transferred to an extreme position , we can distinguish the middle and both ends of the pin.
10,Resistance measurement resolution is 0.1 ohms , 50M ohms can be measured .
11,Can measure capacitanceCan measure capacitance of 30pF-100mF , resolution 1pF.
12.2uF more capacitors can simultaneously measure the equivalent series resistance ESR values. The two can be displayed with a decimal value , resolution 0.01 ohms.
13,Can be in the correct order and the diode symbol display two diodes , and gives the diode forward voltage.
14.LED is detected as a diode forward voltage higher . Combo of the LED is identified as two diodes.
15,Eeverse breakdown voltage is less than 4.5V Zener diode can be identified.
16,Can measure a single diode reverse capacitance. If the bipolar transistor connected to the base and collector or emitter of a pin , it can measure the collector or emitter junction reverse capacitance .
18 can be obtained with a single measurement rectifier bridge connection.
Notice: Before measuring capacitance , the capacitor must be discharged , otherwise very likely damage the meter .

Description
LCR-T4
Description:
1.2020 latest M328 version of the software ,more functions.Chip: Atmega328
2.128*64 big Backlight LCD display,only 2mA when stand by.
3,Using 9V battery (Not included)
Test ranges:
Inductors, capacitors , diodes, dual diode , mos, transistor, SCR , the regulator, LED tube , ESR,
Resistance,Adjustable potentiometer
Resistance :0.1 ohm resolution, maximum 50M ohm
Capacitor :25pf -100,000 uf
Inductors : 0.01mh-20H
NEW Function:
1:Automatic detection of NPN and PNP transistors, n-channel and p-channel MOSFET, diode (including double diode), thyristor, transistor, resistor and capacitor and other components
2: Automatic test the pin of a component, and display on the LCD
3:Can detect the transistor, MOSFET protection diode amplification coefficient and the base to determine the emitter transistor forward biased voltage
4: Measure the gate and gate capacitance of the MOSFET threshold voltage
5:Use 12864 liquid crystal display with green backlight
Specifications: For you reference
1,One -button operation, automatic shutdown .
2,Only 20nA shutdown current.
3,Automatically detect NPN, PNP bipolar transistors , N -channel and P -channel MOS FET, JFET , diodes , two diodes, thyristors small power unidirectional and bidirectional thyristor.
4,Automatic identification components pin arrangement .
5,Measuring bipolar transistor current amplification factor and base - emitter threshold voltage.
6,Via the base - emitter threshold voltage and high current amplification factor to identify Darlington transistors.
7,Can detect bipolar transistors and MOS transistors protection diodes.
8,Measuring the gate MOS FET threshold voltage and the gate capacitance.
9,Can simultaneously measure two resistors and resistor symbol is displayed. Displayed on the right with a decimal value of 4 . Resistance symbol on both sides shows the pin number. So you can measure the potentiometer. If the potentiometer wiper is not transferred to an extreme position , we can distinguish the middle and both ends of the pin.
10,Resistance measurement resolution is 0.1 ohms , 50M ohms can be measured .
11,Can measure capacitanceCan measure capacitance of 30pF-100mF , resolution 1pF.
12.2uF more capacitors can simultaneously measure the equivalent series resistance ESR values. The two can be displayed with a decimal value , resolution 0.01 ohms.
13,Can be in the correct order and the diode symbol display two diodes , and gives the diode forward voltage.
14.LED is detected as a diode forward voltage higher . Combo of the LED is identified as two diodes.
15,Eeverse breakdown voltage is less than 4.5V Zener diode can be identified.
16,Can measure a single diode reverse capacitance. If the bipolar transistor connected to the base and collector or emitter of a pin , it can measure the collector or emitter junction reverse capacitance .
18 can be obtained with a single measurement rectifier bridge connection.
Notice: Before measuring capacitance , the capacitor must be discharged , otherwise very likely damage the meter .

Description
LCR-T4
Description:
1.2020 latest M328 version of the software ,more functions.Chip: Atmega328
2.128*64 big Backlight LCD display,only 2mA when stand by.
3,Using 9V battery (Not included)
Test ranges:
Inductors, capacitors , diodes, dual diode , mos, transistor, SCR , the regulator, LED tube , ESR,
Resistance,Adjustable potentiometer
Resistance :0.1 ohm resolution, maximum 50M ohm
Capacitor :25pf -100,000 uf
Inductors : 0.01mh-20H
NEW Function:
1:Automatic detection of NPN and PNP transistors, n-channel and p-channel MOSFET, diode (including double diode), thyristor, transistor, resistor and capacitor and other components
2: Automatic test the pin of a component, and display on the LCD
3:Can detect the transistor, MOSFET protection diode amplification coefficient and the base to determine the emitter transistor forward biased voltage
4: Measure the gate and gate capacitance of the MOSFET threshold voltage
5:Use 12864 liquid crystal display with green backlight
Specifications: For you reference
1,One -button operation, automatic shutdown .
2,Only 20nA shutdown current.
3,Automatically detect NPN, PNP bipolar transistors , N -channel and P -channel MOS FET, JFET , diodes , two diodes, thyristors small power unidirectional and bidirectional thyristor.
4,Automatic identification components pin arrangement .
5,Measuring bipolar transistor current amplification factor and base - emitter threshold voltage.
6,Via the base - emitter threshold voltage and high current amplification factor to identify Darlington transistors.
7,Can detect bipolar transistors and MOS transistors protection diodes.
8,Measuring the gate MOS FET threshold voltage and the gate capacitance.
9,Can simultaneously measure two resistors and resistor symbol is displayed. Displayed on the right with a decimal value of 4 . Resistance symbol on both sides shows the pin number. So you can measure the potentiometer. If the potentiometer wiper is not transferred to an extreme position , we can distinguish the middle and both ends of the pin.
10,Resistance measurement resolution is 0.1 ohms , 50M ohms can be measured .
11,Can measure capacitanceCan measure capacitance of 30pF-100mF , resolution 1pF.
12.2uF more capacitors can simultaneously measure the equivalent series resistance ESR values. The two can be displayed with a decimal value , resolution 0.01 ohms.
13,Can be in the correct order and the diode symbol display two diodes , and gives the diode forward voltage.
14.LED is detected as a diode forward voltage higher . Combo of the LED is identified as two diodes.
15,Eeverse breakdown voltage is less than 4.5V Zener diode can be identified.
16,Can measure a single diode reverse capacitance. If the bipolar transistor connected to the base and collector or emitter of a pin , it can measure the collector or emitter junction reverse capacitance .
18 can be obtained with a single measurement rectifier bridge connection.
Notice: Before measuring capacitance , the capacitor must be discharged , otherwise very likely damage the meter .

Descriptions:
Have you run out of I/O pins? This great module allows the user to expand up to 16 I/O using only two I/O for control! The PCF8575 is controlled through an I2C interface and features 16-bits of quasi-bidirectional input/output pins.
On board 3.3V level converter circuit, if you donot solder VCC-VDD pad, the PCF8575 level is 3.3V. If you solder it, the level will be the same with VCC
Features:
available library: PCF8575
Working voltage: 2.5 - 5.5V DC
Working current: 100mA(MAX)
I2C address: 0x20(default),can be modified by soldering A1 and A2 selection pads.
16 individually addressable pins.
Each pin configurable for input or output
Open-drain interrupt output pin for input change interrupt.
Great for UNO R3 and other MCU to control simple relay, buzzer, button, led.

Size: 4x2.1cm/1.57x0.83inch
Quantity: 1 Pcs
Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Product Description
Input voltage: 9-12V, can be started with 9V battery, but if there is an arc, the working voltage needs 12V.
PCB board size: 4CM*3.1CM

DIY Kits Included:

1 x PCB board
1 x Coil
1 x 3MM LED Blue
1 x DC005 seat
1 x 105 monolithic capacitor
1 x 8*8 self-locking switch
1 x 10K resistor
1 x 15*10*20 small heat sink
1 x 3*6 screw
1 x BD243
1 x Bubble
3 x M2*4 screw
3 x M2*7 double pass copper column

Tesla coils produce high-temperature and high-pressure plasmas, can ignite, wirelessly transmit electricity, illuminate fluorescent lamps, and have wonderful arcs. There are many fun and very interesting scientific experiments. Tesla Coil is a transformer that operates on the principle of resonance (resonance transformer)

Product Description
Input voltage: 9-12V, can be started with 9V battery, but if there is an arc, the working voltage needs 12V.
PCB board size: 4CM*3.1CM

DIY Kits Included:

1 x PCB board
1 x Coil
1 x 3MM LED Blue
1 x DC005 seat
1 x 105 monolithic capacitor
1 x 8*8 self-locking switch
1 x 10K resistor
1 x 15*10*20 small heat sink
1 x 3*6 screw
1 x BD243
1 x Bubble
3 x M2*4 screw
3 x M2*7 double pass copper column

Tesla coils produce high-temperature and high-pressure plasmas, can ignite, wirelessly transmit electricity, illuminate fluorescent lamps, and have wonderful arcs. There are many fun and very interesting scientific experiments. Tesla Coil is a transformer that operates on the principle of resonance (resonance transformer)

L298N
This L298N driver module, use the ST's L298N chip, can direct drive two road 3-30 v dc motor, and provides a 5 v output interface, can give a 5 v power supply circuit system, support 3.3 VMCU control, easy to control dc motor speed and direction, and can also control two phase stepper motor, is a smart car essential.

The driver chip: double H bridge driver L298N chip
The driving part of the terminal power supply scope VMS: 5 v ~ 35 v
The driving part of the peak current Io: 2 a/bridge
The logical part Vss terminal power supply range: 4.5 to 5.5 V
The logical part of the working current range: 0 ~ 36 ma
Control signal input voltage range: 4.5 5.5 V low level high level 0 V
Maximum power consumption: 20 w
Storage temperature: 25 Deg C ~ 130 Deg C
Drive plate size: 55 mm * 60 mm * 30 mm
Driver board weight: 33 g
Other functions: control the direction of light, the power indicator, current detection, logical part within plate for electrical interfaces.

Introduction
1. Color:As pictures
2. Structure:Fixed capacitors
3. Capacitor Length:5mm/0.19''
4. Capacitor Range : 10pf~100nf
5. Capacitor Tolerance: ±10% .
6. Working Voltage: 50V
7. Quantity:300PCS(30PCS in each type)
8. Durable and easy to install
9. Very convenient and practical
10. High precision and stability
11. Very popular among the electronic lovers
12. Many type of metal film resistors assorted,can meet your different demand.
package include:
300 x Electrolytic Capacitor
1 x Plastic Box
10Value Multilayer Ceramic Capacitor Assortment Kit Each 30pcs
10pF 20pF 30pF 47pF 56pF
68pF 100pF 1nF 10nF 100nF

Product Description
Non-contact magnetic induction angle measurement module.
High precision, multiple output modes: IIC, PWM, voltage, etc.
Electrical parameters:
VCC 3.3V
GND power ground
Out PWM/analog voltage output
DIR rotation direction (grounded = clockwise value increases; connected to VCC = clockwise value decreases)
SCL IIC communication clock line
SDA IIC communication data line
GPO mode selection (internal pull-up, ground = programming mode B)

Product Description
1. Description:
This product is a stereo Bluetooth amplifier module. The Bluetooth version is 4.2.
2. Features:
1>. The version is 4.2. It can be compatible with all mobile phones and Bluetooth adapters on the market.
2>. The distance is 15 meters in open space.
3>. It supports automatically connecting devices that have been paired and playing music automatically.
4>. F class power amplifier 5W 5W, high power output, over 8002 sound quality.
5>. It supports USB sound card, no drive, plug and play.
6>. Good sound quality, suitable for upgrading and refitting the idle sound box and DIY production.
3. Instructions:
1>. Support USB sound card, free drive, plug and play (normal lithium battery power supply situation).
2>. This product has dual 5W power amplifier circuit. It can not be used in addition to the power amplifier. The output of two amplifiers can not be connected in parallel or connected to the negative electrode, otherwise the power amplifier chip will be damaged.
3>. There are two 2-8 European and 3-10W speakers respectively, and 3 European 5W and 4 European 10W horn are used. The output is stereo.
4>. Maximum working current is 5V 2A, using 5V 2A or more voltage power supply, sound quality will be better.
5>.It is suggested that a 3.7-5V lithium battery (the lithium battery needs a protective plate! It can charge a lithium battery with a USB rechargeable battery, and the USB port can not be used as a power supply port.) or a 5V adapter be used for power supply. It can not use voltage and current unstable power supply, such as dry battery, portable charger, multi-function transformer and so on.
6>. When the Bluetooth board is installed, the antenna should not be close to the metal parts so as not to affect the transmission distance.
4. Operation:
Start the cell phone Bluetooth, scan the device, find the "DW-CT14 " to click connection.
5. Note:
The charging interface of this product is a current limiting charging mode without charge management. For your safety, be sure to use a regular lithium-ion battery with a protective plate, which can cause loss due to improper use.
6. Package list:
Main board plug line

Features:
1. bluetooth V4.2 version, unterstützung Bluetooth automatische verbindung technologie, unterstützung WAV/WMA/FLAC/APE/MP3 verlustfreie decodierung, stereo dual channel 2.nach die modul ist powered auf, die handy sucht für die Bluetooth name MH-M18/MH-M28/MH-M38, und kann musik spielen nach dem anschluss Bluetooth. 3.modul blau anzeige licht: Wenn die Bluetooth ist nicht verbunden, die anzeige licht blinkt schnell; Wenn die bluetooth-verbindung ist auf, die anzeige licht ist immer auf; Die folgenden ist eine einführung zu jeder version: MH-M18: PCB größe: 23*16*2,5mm (länge, breite und höhe) Pin pitch: 2,54mm (kann direkt angebracht oder gelötet)
Precise incisions and interfaces ensure perfect suitability for mounting position. Easy installation.
Made of high quality materials, corrosion-resistant, wear-resistant, durable and long life time.
Professional chip sets provide excellent performance in the system.
Low power consumption, support Bluetooth 4.2 transmission, dual channel stereo lossless playback. After module connect with Bluetooth, it can quickly realize Bluetooth wireless transmission, very convenient to use.
The Bluetooth connection distance can be up to 20 meters in open space. It is widely used in all kinds of Bluetooth audio receiving and all kinds of DIY audio modification, etc.
Specification:
Material: ABS
Color: As picture shown
Working Voltage: 5V/ 3.7-4.2V
Connection Working Status: 20mA
Transmission Distance: 20 meters (in open space or low interference conditions)
Working Temperature: -40℃-85℃
Size: Approx. 2.3x1.7x0.2 cm/ 0.91x0.67x0.08 inch

Pecification:
100% brand new and high quality
The HTU21D is a low-cost, easy to use, highly accurate, digital humidity and temperature sensor. This sensor is ideal for environmental sensing and data logging and perfect for a weather stations or humidor control systems. All you need is two lines for I2C communication and youâll have relative humidity readings and very accurate temperature readings as a bonus!
There are only four pins that need to be hooked up in order to start using this sensor in a project. One for VCC, one for GND, and two data lines for I2C communication. This breakout board has built in 4.7k pull up resistors for I2C communications. If youâre hooking up multiple I2C devices on the same bus, you may want to disable these resistors
Power supply: 1.5V-3.6V
Humidity measure range: 0-100% RH
Temperature measure range:-40degree105degree
Max. power consumption: 2.7uW
Communication: I2C
Humidity precision(10% RH to 95% RH): HTU21D±2% RH
Humidity delay: /-1% RH
Measure time: 50ms
Year drift: -0.5% RH/year
Response time: 5s
Size: 1.5x1.5cm(approx)

30 Kinds 1/4W Resistance 1%
Experimental resistance package
1/4W metal film resistor package
1% precision
1% error
30 kinds ofcommonly usedresistanceof each20
Thespecificationsare as follows:
10Ω 22Ω 47Ω 100Ω 150Ω 200Ω 220Ω 270Ω 330Ω
470Ω 510Ω 680Ω 1KΩ 2KΩ 2.2KΩ 3.3KΩ 4.7KΩ
5.1KΩ 6.8KΩ 10KΩ 20KΩ 47KΩ 51KΩ 68KΩ 100KΩ
220KΩ 300KΩ 470KΩ 680KΩ 1M

Describe
XH-M228 Dual Channel Digital Audio Stereo Amplifier Module TPA3110 Mini Binaural Speaker Power Amplifier Board
Feature:
1. This power amplifier board must be powered by DC, requiring a good performance switching power adapter.
2. Can not use AC transformer, if use AC transformer, must pass through rectifier, filter circuit into pure DC that can be used.
3. DC power supply: voltage DC12V-24V/current power greater than 2A, must distinguish positive/negative poles, do not exceed DC24V voltage to use, otherwise it will burn IC chips.
4. It can connect the speaker or speaker 4ohm or 8ohm, and the power is between 10W and 80W, depending on the size of the power supply, which determines the power of the speaker.
Specification:
Size: 38*28*3mm/1.49*1.1*0.11''
Note:
Please allow 1-3cm differs due to manual measurement.
Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.

1.3 inch OLED 7 Pin
Driver chip SH1106
Support interface SPI
Resolution 128×64
Display size 1.3 inches
Display color: white/blue/
Dimensions 35.5X33.7X1.2(mm)
Glass size 34.5X23X1.45(mm)
Display area 29.42X14.7(mm)
Positive and negative tolerance 0.2mm
Number of needles 7 needles
Viewing angle >160°
Working temperature -40℃~80℃
Storage temperature -45℃~85℃
Working voltage 3.3V / 5V
1.3 inch OLED 4 Pin
Driver chip SH1106
Support interface IIC
Resolution 128×64
Display size 1.3 inches
Display color: white/blue
Dimensions 35.5X33.7X1.2(mm)
Glass size 34.5X23X1.45(mm)
Display area 29.42X14.7(mm)
Positive and negative tolerance 0.2mm
Number of needles 4 needles
Viewing angle >160°
Working temperature -40℃~80℃
Storage temperature -45℃~85℃
Working voltage 3.3V / 5V

1.3 inch OLED 7 Pin
Driver chip SH1106
Support interface SPI
Resolution 128×64
Display size 1.3 inches
Display color: white/blue/
Dimensions 35.5X33.7X1.2(mm)
Glass size 34.5X23X1.45(mm)
Display area 29.42X14.7(mm)
Positive and negative tolerance 0.2mm
Number of needles 7 needles
Viewing angle >160°
Working temperature -40℃~80℃
Storage temperature -45℃~85℃
Working voltage 3.3V / 5V
1.3 inch OLED 4 Pin
Driver chip SH1106
Support interface IIC
Resolution 128×64
Display size 1.3 inches
Display color: white/blue
Dimensions 35.5X33.7X1.2(mm)
Glass size 34.5X23X1.45(mm)
Display area 29.42X14.7(mm)
Positive and negative tolerance 0.2mm
Number of needles 4 needles
Viewing angle >160°
Working temperature -40℃~80℃
Storage temperature -45℃~85℃
Working voltage 3.3V / 5V

1.3 inch OLED 7 Pin
Driver chip SH1106
Support interface SPI
Resolution 128×64
Display size 1.3 inches
Display color: white/blue/
Dimensions 35.5X33.7X1.2(mm)
Glass size 34.5X23X1.45(mm)
Display area 29.42X14.7(mm)
Positive and negative tolerance 0.2mm
Number of needles 7 needles
Viewing angle >160°
Working temperature -40℃~80℃
Storage temperature -45℃~85℃
Working voltage 3.3V / 5V
1.3 inch OLED 4 Pin
Driver chip SH1106
Support interface IIC
Resolution 128×64
Display size 1.3 inches
Display color: white/blue
Dimensions 35.5X33.7X1.2(mm)
Glass size 34.5X23X1.45(mm)
Display area 29.42X14.7(mm)
Positive and negative tolerance 0.2mm
Number of needles 4 needles
Viewing angle >160°
Working temperature -40℃~80℃
Storage temperature -45℃~85℃
Working voltage 3.3V / 5V

1.3 inch OLED 7 Pin
Driver chip SH1106
Support interface SPI
Resolution 128×64
Display size 1.3 inches
Display color: white/blue/
Dimensions 35.5X33.7X1.2(mm)
Glass size 34.5X23X1.45(mm)
Display area 29.42X14.7(mm)
Positive and negative tolerance 0.2mm
Number of needles 7 needles
Viewing angle >160°
Working temperature -40℃~80℃
Storage temperature -45℃~85℃
Working voltage 3.3V / 5V
1.3 inch OLED 4 Pin
Driver chip SH1106
Support interface IIC
Resolution 128×64
Display size 1.3 inches
Display color: white/blue
Dimensions 35.5X33.7X1.2(mm)
Glass size 34.5X23X1.45(mm)
Display area 29.42X14.7(mm)
Positive and negative tolerance 0.2mm
Number of needles 4 needles
Viewing angle >160°
Working temperature -40℃~80℃
Storage temperature -45℃~85℃
Working voltage 3.3V / 5V

Product introduction:
This product is a low-power Bluetooth design scheme, supports the latest Bluetooth 4.2 transmission, two-channel stereo lossless playback, after the module is connected to Bluetooth, Bluetooth wireless transmission can be quickly realized, which is very convenient. In an open environment, the Bluetooth connection distance can reach up to 20 meters.
It is widely used in various Bluetooth audio receivers, various audio DIY modification, etc.

Function Description:
Bluetooth V4.2 version, support Bluetooth automatic connection technology, support WAV/WMA/FLAC/APE/MP3 lossless decoding, stereo dual-channel output.
After the module is powered on, the mobile phone searches for the Bluetooth name HW-406, and it can play music after connecting to the Bluetooth;
Module blue indicator light:
When Bluetooth is not connected, the indicator light flashes quickly;
When the Bluetooth is connected, the indicator light is always on;
When Bluetooth is playing, the indicator light flashes slowly.

MH-M38:
1. 5V: power supply positive 5V
2. GND: negative pole of power supply
3. VBAT: Lithium battery anode 3.7-4.2V
4. L /L-: Left channel output (directly connected to the speaker)
5. R /R-: Right channel output (directly connected to the speaker)
1. Power supply: You can directly use the MICRO USB Android cable 5V for power supply, or you can also connect to a 5V power supply or a 3.7V lithium battery. Note that the power supply interface of 5V and 3.7V is different, 5V is connected to 5V and GND, and 3.7V lithium battery is connected to VBAT and GND.
The maximum working current is 5V2A. It is recommended to use a 5V2A regulated power supply for better sound quality.
2. Support USB sound card, free drive (plug and play). Connect the module to the computer with a USB data cable, and the computer can play music and output through the module's amplifier
3. Audio output: output left and right channel stereo audio signals, which can be connected to two 2-8 ohm and 3-5W speakers respectively, and 4 ohm 5W speakers are recommended for storage.

4. This product has built-in dual 5W power amplifier circuit, and you must not use it with another power amplifier! The outputs of the two power amplifiers cannot be connected in parallel or the negative poles connected together, otherwise the power amplifier chip will be damaged.

Precautions
Signal interference: Bluetooth antennas are extremely susceptible to interference from high-frequency or strong electromagnetic signals, so please place them as far away as possible from wireless devices. And the board can not be close to metal objects, keep a certain distance.

If there is current noise on the power amplifier board, the cause is caused by ground wire interference. It is recommended that you do not use plug-in wires at the output of the Bluetooth module, but must be soldered, especially the ground wire, and the wire should not be too long, the shorter the better, and try Thicker. If the audio ground is at the grounding point of the power amplifier board, it needs to be connected to the ground of the audio input end of the power amplifier. This grounding point can be welded in different positions to achieve the lowest current sound. It is recommended that the Bluetooth and the power amplifier board be powered separately, and the Bluetooth ground and the power amplifier ground are isolated.

Since this product is a bare board design, try not to touch the components on the board with your hands, which will easily cause static electricity to kill the chip and cause burnout.

Introduction
Brand new and high quality
Model: MB-102 Breadboard with color bar and red and blue line
Ideal for high frequency and low noise circuits
Interconnect any components with 20-29 AWG(0.3-0.8 mm) wire
Special designed spring clip over 5,000 insertion cycles
Nickel plated, silver plated and gold plated available
830 points
Size: 16.5 x 5.5 cm
Color:White/Transparent