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CH341A 24 25 Series EEPROM Flash BIOS USB Programmer with Software & Driver
Product Details:
USB Programmer
Condition: New
Support 24EEPROM and 25 SPI flash 8pin/16pin chip
USB to TTL port, can getroot online
With CH341A chip
Recognize 25 series chip automatically
And support download STC series procedure of singlechip
With 24/25 status indicator lamp
SPI pin to support expanding the utility
Color is shown as pictures
PLS NOTE that due to lighting effects, monitor's brightness/ contrass settings ect, there could be some slight differences in the color tone of the pictures and the actual item! 
Package Included:
1 x USB Programmer
1 x Pinboard
 

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Description:
 
1: input: 4.5 V DC - 7 V (input voltage must be wining the to the output voltage high 1 V above.)
2: the output: 3.3 V, 800 mA (the load current can 't wining 800 mA)
3: PCB size: 8.6 * 12.3 mm
 
Attention:
1: the Boost modules or buck module indicate the operating voltage, both Please donot exceed operating voltage, or it will be on easily!
2: the Boost module output voltage can only be greater than or equal to the input voltage, always be less than the input voltage.
3: Buck module input voltage must be who the output voltage of 1.5 V or 2 V, otherwise it can not output the enough power!
4: Automatic Adjustable Boost or Buck the module from the start voltage and limit the working voltage, both Please donot exceed them, or it will be on easily!
5: always reverse polarity, or it will be short circuit, or will be born easily!

LCD USB Detector Voltage Current Meter Power Battery Capacity Tester Meter Mobile Power Detector Battery Test Voltmeter Ammeter
 
Features:
This is the mini USB meter.
It can clearly display all the data.
Can easily measure the USB ( PC USB, cell phone charger, car charger , mobile power , etc. ) port and device operating current and the output voltage charge-discharge capacity, performance, and judge the performance of the charging cable charging equipment, this tester can meet the requirements !
Fit to factories, laboratories and personal use, wide range and Easy to use, easy to take alone, no additional power supply, Plug and play.
Description:
DIY Supplies: Electric
Display Type: Digital Only
Code Accuracy class: Plus or minus 1%
Operating temperature: normal
Power Supply: AC
Voltage: 4-20V /-1%
Current: 0-3A /-1%
Time: 0-99H
Specifications:
Model: KWS-V20
Material: Plastic
Color: Blue
Size: 59*23*13.5mm

Description:
Operating voltage: 3-5V
Operating current: 40MA
Weight: 1g (5 by one weight)
Size: 12.7 * 5.2 * 2.2

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

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PWM to Voltage Module
(PWM to Voltage Converter Module 0% -100% to 0-10V for PLC MCU Digital to Analog Signal PWM Adjustabl Converter Power Module) 1. Description: The PWM transfer voltage module LC-LM358-PWM2V converts the PWM digital signals into 0 to 10V analog signals. It can be used as signal interface switching for PLC or other industrial control boards. The output voltage is regulated by adjusting the duty ratio of the PWM. The modules are small in size and easy to use in different places. 2. Features: 1>. MCU embedded technology 2>. Easy to operate, fine tuned by potentiometer 3>. Select the PWM signal input level range through short-circuit 4>. The module is smaller, easy to carry and use 3. Parameter: 1>. Work Voltage:DC 12V-30V; (> 100MA) 2>. PWM Receiver Frequency:1KHZ-3KHZ 3>. PWM signal input level range: The peak of 4.5V to 10V level. The short cap install in ‘5V'. This level is used for normal controller or 5V MCU The peak of 12V to 24V level, so inserted in 24V. The short cap install in ‘24V'. This level is used for normal PLC controller 4>. Conversion range:0% -100% PWM to 0-10V 5>. Allowable error:5% 4. Hardware Interface: VCC DC 12V-30V GND Ground PWM Positive of PWM input signal GND Negative of input signal VOUT Output Voltage 0-10V GND Output Voltage Ground 5. Operation instructions: After power on, without input signal, the output is 0V, so only input can output. The first time when the power is on, it is best to do a calibration debugging:Input a 50% duty ratio signal to PWM/GND and adjust the relative amplitude short cap. The frequency is 1KHZ-3KHZ, Measured VOUT and GND with a multimeter and it will display 5V. Adjust potentiometer to make sure display 5.00V on multimeter. This will calibrate your pulse signal to this module. When the frequency changes, the correspondences may be offset and need to be re calibrated. The output voltage can be adjusted by adjusting the duty ratio. The accuracy can be controlled by adjusting the potentiometer.

Smart Electronics FZ0455 4pin KEYES KY-016 Three Colors 3 Color RGB LED Sensor Module for Arduino DIY Starter Kit KY016

 

100% High quality and Brand new Support all within 12V 5A fans, synchronous rectifier output, high efficiency! Even if a large current work does not require additional heat sink! A plurality of fans can be used in parallel (total current does not exceed 5A), supports automatic temperature control and manumotive speed control, temperature control speed with four temperature zones for setting up, easy to apply in a variety of applications! It can be opened with a three-wire fan monitoring function (stall warning). Working voltage:DC12V Circuit load capacity: maximum current per output 5A, the bus currents up 9A Output Range: The first channel 20% -100% , or 40% -100% (TFL = ON) The second channel and the third channel 10% -100% (Note: Above range only for PWM range, the actual control effect will vary depending on the fan.) Temperature probe parameters: 50K B = 3950 Thermostat temperature zone error: error depending on the temperature probe, generally 3-5% Stall alarm minimum speed: 700-800 rpm Function setting switch Description: TFL (No. 1): The lowest temperature channel PWM setting, when ON state FAN1 PWM minimum is 40% , when OFF the minimum PWM of FAN1 is 20% . TP1 TP2 (No. 2,3): Temperature channel control temperature zones are interpreted as follows (need to used with the temperature probe): TP1 TP2 Accelerating temperature Full speed temperature OFF OFF 35° 45° ON OFF 40° 55° OFF ON 50° 70° ON ON 60° 90° When the temperature lower than the accelerated temperature, then output at the minimum rotation speed; when it exceed over the full temperature, then always output at full speed. BF1 BF2 (No. 4,5): corresponds FAN1 FAN2 stall alarm function switch, when the corresponding open channel fan break down, the controller will alarm with soundand light (works with buzzle), alarm will automatically eliminated when the fan is rotated recovery . If BF1 and BF2 both are open (ON), the FAN1, FAN2 have any one or both stops, the controller will alarm! Package includes: 1pc x Speed controller 1pc x Temperature probe 1pc x Buzzle

Product features:
1. The ultra-thin, subminiature
2. The full voltage input (90 ~ 264 vac)
3. Low ripple and low noise
4. Output overload short circuit protection function
5. High efficiency and power density
6. Product design to meet the EMC and safety testing requirements
7. Low power consumption, green environmental protection, no-load loss < 0.1 W
Aging and
8.100% load test
9. Meet the requirements of UL, CE,
The quality guarantee period of 10.1 years
2. Environmental conditions
The name of the project
Technical indicators:Single bit
Working temperature: - 20-60 degree
Storage temperature: 80-40 -degree
Relative humidity: 5-95.%
The cooling way: Natural cooling
 
The atmospheric pressure: 80-106Kpa
The altitude :2000M or less
vibration
Vibration coefficient of 10 ~ 500 hz, 2 g10min. / 1 cycle, 60 min. Each along the X, Y, Z axes
 
3. The electrical characteristics
 
1. The input features (test) at room temperature.
The name of the project
The technical requirements:Single bit
The rated input voltage:100-100.VAc
The input voltage range:90-90.VAc
Maximum input current:0.2 or less a.
Input surge current;10 or less a.
Maximum input voltage:270 or less VAc
Input soft start: 50 or less MS
Efficiency of low input voltage: Vin = 110 vac, output with 69 or more %
High input voltage: Vin = 220 vac, output with 70 or more %
Long-term reliability:MTBF 100000 or more H.
No load rated output voltage: 5 / - 0.1 VDc
Full rated output voltage: 5 / - 0.2 VDc A
short time maximum output current: P 1000 ma
The maximum output current for a long time: P 600 ma
Voltage regulation: / - 0.2 %
Load regulation: / - 0.5  %
The output ripple and noise: (mVp - p) 50 or less
The rated input voltage and output load.With 20 MHZ bandwidth oscilloscope,
Load and 10 uF and 0.1 uF capacitance test. The MV
Switch machine overshoot
(rated input voltage, output and 10% load) 5 or less % VO
Output over-current protection
Output the maximum load of 150-200%
a.
Output short circuit protection
Directly to the output of the normal short circuit, short circuit automatically resume normal work after removal
4. Safety features:
4.1 the product design as to meet the requirements of UL, CE safety certification.
 
4.2 safety and electromagnetic compatibility
The input design USES UL 0.5 A insurance;
PCB board made of double-sided copper-clad boards material is 94 - where V0 fire rating level;
Safety standards in accordance with UL1012 EN60950, UL60950
Insulation voltage I/P - O/P: 2500 vac
Insulation resistance I/P - O/P > 100 m Ohms / 500 VDC 25 degree 70% RH
Conduction and radiation in line with the EN55011, EN55022 (CISPR22)
Electrostatic discharge IEC/EN 61000-4-2 level 4 8 kv / 15 kv
Radiofrequency radiation immunity IEC/EN 61000-4-3 can be found in the application
4.3 safety design temperature
At normal temperature on our power capacitor, main converter so on surface temperature does not exceed 90 degree; the largest
The shell surface maximum temperature does not exceed 60 degree;

Product features:
1. The ultra-thin, subminiature
2. The full voltage input (90 ~ 264 vac)
3. Low ripple and low noise
4. Output overload short circuit protection function
5. High efficiency and power density
6. Product design to meet the EMC and safety testing requirements
7. Low power consumption, green environmental protection, no-load loss < 0.1 W
Aging and
8.100% load test
9. Meet the requirements of UL, CE,
The quality guarantee period of 10.1 years
2. Environmental conditions
The name of the project
Technical indicators:Single bit
Working temperature: - 20-60 degree
Storage temperature: 80-40 -degree
Relative humidity: 5-95.%
The cooling way: Natural cooling
 
The atmospheric pressure: 80-106Kpa
The altitude :2000M or less
vibration
Vibration coefficient of 10 ~ 500 hz, 2 g10min. / 1 cycle, 60 min. Each along the X, Y, Z axes
 
3. The electrical characteristics
 
1. The input features (test) at room temperature.
The name of the project
The technical requirements:Single bit
The rated input voltage:100-100.VAc
The input voltage range:90-90.VAc
Maximum input current:0.2 or less a.
Input surge current;10 or less a.
Maximum input voltage:270 or less VAc
Input soft start: 50 or less MS
Efficiency of low input voltage: Vin = 110 vac, output with 69 or more %
High input voltage: Vin = 220 vac, output with 70 or more %
Long-term reliability:MTBF 100000 or more H.
No load rated output voltage: 5 / - 0.1 VDc
Full rated output voltage: 5 / - 0.2 VDc A
short time maximum output current: P 1000 ma
The maximum output current for a long time: P 600 ma
Voltage regulation: / - 0.2 %
Load regulation: / - 0.5  %
The output ripple and noise: (mVp - p) 50 or less
The rated input voltage and output load.With 20 MHZ bandwidth oscilloscope,
Load and 10 uF and 0.1 uF capacitance test. The MV
Switch machine overshoot
(rated input voltage, output and 10% load) 5 or less % VO
Output over-current protection
Output the maximum load of 150-200%
a.
Output short circuit protection
Directly to the output of the normal short circuit, short circuit automatically resume normal work after removal
4. Safety features:
4.1 the product design as to meet the requirements of UL, CE safety certification.
 
4.2 safety and electromagnetic compatibility
The input design USES UL 0.5 A insurance;
PCB board made of double-sided copper-clad boards material is 94 - where V0 fire rating level;
Safety standards in accordance with UL1012 EN60950, UL60950
Insulation voltage I/P - O/P: 2500 vac
Insulation resistance I/P - O/P > 100 m Ohms / 500 VDC 25 degree 70% RH
Conduction and radiation in line with the EN55011, EN55022 (CISPR22)
Electrostatic discharge IEC/EN 61000-4-2 level 4 8 kv / 15 kv
Radiofrequency radiation immunity IEC/EN 61000-4-3 can be found in the application
4.3 safety design temperature
At normal temperature on our power capacitor, main converter so on surface temperature does not exceed 90 degree; the largest
The shell surface maximum temperature does not exceed 60 degree;

Product features:
1. The ultra-thin, subminiature
2. The full voltage input (90 ~ 264 vac)
3. Low ripple and low noise
4. Output overload short circuit protection function
5. High efficiency and power density
6. Product design to meet the EMC and safety testing requirements
7. Low power consumption, green environmental protection, no-load loss < 0.1 W
Aging and
8.100% load test
9. Meet the requirements of UL, CE,
The quality guarantee period of 10.1 years
2. Environmental conditions
The name of the project
Technical indicators:Single bit
Working temperature: - 20-60 degree
Storage temperature: 80-40 -degree
Relative humidity: 5-95.%
The cooling way: Natural cooling
 
The atmospheric pressure: 80-106Kpa
The altitude :2000M or less
vibration
Vibration coefficient of 10 ~ 500 hz, 2 g10min. / 1 cycle, 60 min. Each along the X, Y, Z axes
 
3. The electrical characteristics
 
1. The input features (test) at room temperature.
The name of the project
The technical requirements:Single bit
The rated input voltage:100-100.VAc
The input voltage range:90-90.VAc
Maximum input current:0.2 or less a.
Input surge current;10 or less a.
Maximum input voltage:270 or less VAc
Input soft start: 50 or less MS
Efficiency of low input voltage: Vin = 110 vac, output with 69 or more %
High input voltage: Vin = 220 vac, output with 70 or more %
Long-term reliability:MTBF 100000 or more H.
No load rated output voltage: 5 / - 0.1 VDc
Full rated output voltage: 5 / - 0.2 VDc A
short time maximum output current: P 1000 ma
The maximum output current for a long time: P 600 ma
Voltage regulation: / - 0.2 %
Load regulation: / - 0.5  %
The output ripple and noise: (mVp - p) 50 or less
The rated input voltage and output load.With 20 MHZ bandwidth oscilloscope,
Load and 10 uF and 0.1 uF capacitance test. The MV
Switch machine overshoot
(rated input voltage, output and 10% load) 5 or less % VO
Output over-current protection
Output the maximum load of 150-200%
a.
Output short circuit protection
Directly to the output of the normal short circuit, short circuit automatically resume normal work after removal
4. Safety features:
4.1 the product design as to meet the requirements of UL, CE safety certification.
 
4.2 safety and electromagnetic compatibility
The input design USES UL 0.5 A insurance;
PCB board made of double-sided copper-clad boards material is 94 - where V0 fire rating level;
Safety standards in accordance with UL1012 EN60950, UL60950
Insulation voltage I/P - O/P: 2500 vac
Insulation resistance I/P - O/P > 100 m Ohms / 500 VDC 25 degree 70% RH
Conduction and radiation in line with the EN55011, EN55022 (CISPR22)
Electrostatic discharge IEC/EN 61000-4-2 level 4 8 kv / 15 kv
Radiofrequency radiation immunity IEC/EN 61000-4-3 can be found in the application
4.3 safety design temperature
At normal temperature on our power capacitor, main converter so on surface temperature does not exceed 90 degree; the largest
The shell surface maximum temperature does not exceed 60 degree;

D1 Mini - Mini NodeMcu 4M Bytes Lua WIFI Internet of Things Development Board Based ESP8266 WIFI Module

Specification:
Power supply voltage: 1.8-3.6V DC
Measuring range (humidity): 0~ 100% RH
Measuring range (temperature): -40~ 85*C
Humidity accuracy: ±2% RH(25"C)
Temperature accuracy: ±0.3"C
Reslution: Temperature: 0.01℃ Humidity: 0.024% RH
Output signal: I2C signal
 
Interface:
VDD: Connect to power supply (1. 8-3.6V)
SDA: serial data, bidirectional
GND: power ground
SCL: serial clock, bidirectional
 
AHT15 pinout:
 
Power supply pin (VDD GND)
The power supply range of AHT15 is 1.8-3.6V, and the recommended voltage is 3.3V. A 100nF decoupling capacitor must be connected between the power supply (VDD) and ground (GND), and the location of the capacitor should be as close as possible to the sensor.
 
Serial clock (SCL)
SCL is used to synchronize the communication between the microprocessor and AHT15. Since the interface contains completely static logic, there is no minimum SCL frequency.
 
Serial data (SDA)
The SDA pin is used for data input and output of the sensor.

Descirption:
 
 
This module is a plant watering alarm - as simple as that. You put it into the soil near a plant and it emits a tiny chirp when the soil is dry, reminding you to water the plant. Chirp uses capacitive humidity sensing as opposed to resistive humidity sensing, this means, it does not make an electric contact with the soil, avoiding electrode corrosion and soil electrolysis and resulting in better accuracy and longer battery life.
 
Special care has been taken not to make it yet another source of annoyance - Chirp will be silent when it's dark and will restrict itself from making too much noise.
 
The alarm level can be set for each plant individually. As water is consumed by the plant, Chirp will detect the low moisture level and will start to emit rare short chirps. As more water evaporates, Chirp will increase the alarm rate. Chirp can detect if it's day or night by measuring the amount of ambient light and will not make noise when it's dark.
 
1.Size:140*15mm
 
2.Work voltage:3V
 
 
Package Included:
 
  1 x CJMCU Plant Watering Alarm Alerter Humidity Moisture Sensor Module Soil Sensor

Description :
A perfect Bluetooth audio receiver board for use. 
Built-in 3.5mm audio jack for audio output. 
Bluetooth 2.1 receive, can connect with the earphone and can also be used for power amplifier. 
USB interface, powered by DC 5V; with TF card slot. 
With 5 buttons for adjustment, convenient and easy operation. 
The transmission distance could be up to 10m(shielded signals). 
Specifications: 
Power Interface: Mini USB Interface 
Supply Voltage: DC 5V 
Audio Input: Bluetooth V2.1 
Audio Jack: 3.5mm 
Applicable Impedance: 4-8 ohm 
PCB Board Size: 50 * 40mm / 1.97 * 1.57in 
Weight: 11g / 0.39oz 
Package Included :
    1 x Audio Receiver Board

 1pcs ESP-12E  ESP-12F WeMos D1 WiFi uno based ESP8266 shield for arduino Compatible IDE

 1pcs ESP-12E  ESP-12F WeMos D1 WiFi uno based ESP8266 shield for arduino Compatible IDE

 1pcs ESP-12E  ESP-12F WeMos D1 WiFi uno based ESP8266 shield for arduino Compatible IDE

 1pcs ESP-12E  ESP-12F WeMos D1 WiFi uno based ESP8266 shield for arduino Compatible IDE

This is a undervoltage switch module used to turn off the power of resistive load in the event of the voltage dropping below a definite value.
When the voltage rises back, the module will automatically turn on load again.
The module has a low power consumption of less than 10mA.
Default undervoltage protection value is about 10.5V, and can be adjusted by turning potentiometer, clockwise to increase and anticlockwise to reduce.
If the load restores immediately after it is turned off, you can add a capacitor(>25V), and the capacitance depends on your load.
 
Specification: 
Input Voltage: 12V DC
Power Consumption: <10mA
DC Load: 12V DC, 10A(resistive load) 
Size: 40*29*19mm/1.57*1.14*0.74" /> 
Mounting Size: 34mm/1.33", 3mm/0.11"(dia.) 
 
Note: 
The installation of electronic modules requires basic knowledge and requires a certain electronic professional foundation and hands-on ability. Please purchase carefully! 
Manual measurement, with small error. Please check size in detail before purchase.

CJMCU-219 is a module with the I2C interface of zero drift and bi-directional current/power monitoring and control integrated circuit (IC), further expand the TI energy-saving electronic products.INA219 has the industry's highest precision and the small size, not only can monitor the pressure drop on the shunt resistor, sensing shunt power supply voltage, at the same time also can calculate the power.The device adopts the SOT23 packaging, but for the server, notebook computer, power supply, battery management and digital electric vehicle and telecommunication equipment measuring flu provide small, low cost solution. INA219-40 c to 85 c temperature range and can realize the maximum error of 1% accuracy, maximum offset of 100 uV.The advantage of the high precision of the product in combination with 12 resolution, can help clients as much as possible, reduce the pressure drop on the shunt resistor, which can minimize the power loss and power consumption, and saving board space.The device epic of 26 bus voltage range of 0 V to V. INA219 other important features include: Calibration programmable registers can directly read its unit of measure is the ampere current, and power in watts per read. For as many as 128 sampling averaging, in order to realize filter in noise environment. The I2C interface has a timeout, not only can avoid the bus lock, but also can provide high-speed mode, meet the communication requirements of up to 3.4 MHz. All features are support software programmable INA219. Using single power supply, the working voltage between 3.0 to 5.5 V.
 

The EasyDriver is a simple to use stepper motor driver,
compatible with anything that can output a digital 0 to 5V pulse
(or 0 to 3.3V pulse if you solder SJ2 closed on the EasyDriver).
EasyDriver requires a 7V to 30V supply to power the motor and can power any voltage of stepper motor.
The EasyDriver has an on board voltage regulator for the digital interface that can be set to 5V or 3.3V.
Connect a 4-wire stepper motor and a microcontroller and you\'ve got precision motor control!
EasyDriver drives bi-polar motors, and motors wired as bi-polar. I.e. 4,6, or 8 wire stepper motors.
On this version (v4.4) we fixed the silk error on the min/max adjustment.
MS1 and MS2 pins broken out to change microstepping resolution to full, half, quarter and eighth steps (defaults to eighth)
Compatible with 4, 6, and 8 wire stepper motors of any voltage
Adjustable current control from 150mA/phase to 750mA/phase
Power supply range from 7V to 30V. The higher the voltage, the higher the torque at high speeds
This is the newest version of EasyDriver V4 co-designed withBrian Schmalz.
It provides much more flexibility and control over your stepper motor, when compared to older versions.
The microstep select (MS1 and MS2) pins of the A3967 are broken out allowing adjustments to the microstepping resolution.
The sleep and enable pins are also broken out for further control.
Note: Do not connect or disconnect a motor while the driver is energized. This will cause permanent damage to the A3967 IC.
Specifications:
Main color:Red
Board size:47 x 20mm
Pin header size:51 x11mm
Net weight:7g
 
1x A3967 board
1x Pin Header

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Please do not freeloaders,if you can not accept without more tracking information .
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Notice: The new tracking number for China Post Ordinary Small Packet Plus can be traced only befor it arrive the airport of your country,please choose China Post Air Mail if you want a full tracking info.
 
Tracking info of  China Post Ordinary Small Packet Plus can be check here: www.17track.net/en

This circuit is composed of 16 pcs LED (light emitting diode). The 16pcs LED divided into four groups, and each group has different flashing frequencies, when four groups flash together, this item looks like a small Christmas tree. The circuit is powered by a 9V battery.
Advantages:
This circuit is simple and practical, low power consumption.It uses integrated circuits for driving: fewer parts,and the line is simple and easy to understand.
External Wiring Kit:
With pluggable plug for easy replacement of parts at any time and conducive circuit debugging. Also allows us to deepen our understanding of the principles of the circuit in the debugging process.
This line is in the form of the oscillation circuit by the cycle generated by the following principles:
- after the first charge, the capacitor C1 & C4 charging is complete.
- capacitors C2 & C3 will continue to charge.
- when the transistor Q1 & Q4 is turned on at the same time, it discharges the capacitor C1 & C4.
- capacitors C2 & C3 is fully charged, the transistor Q1 & Q4 will be closure, while also charging the capacitor C1 & C4 again.
- transistors Q2 & Q3 is turned on while the capacitor C2 & C3 will be discharged.
- By analogy, the flash of speed is the oscillation frequency, and the frequency is determined by the resistor R & capacitance C values.
- Board Size:70mm*110mm

This circuit is composed of 16 pcs LED (light emitting diode). The 16pcs LED divided into four groups, and each group has different flashing frequencies, when four groups flash together, this item looks like a small Christmas tree. The circuit is powered by a 9V battery.
Advantages:
This circuit is simple and practical, low power consumption.It uses integrated circuits for driving: fewer parts,and the line is simple and easy to understand.
External Wiring Kit:
With pluggable plug for easy replacement of parts at any time and conducive circuit debugging. Also allows us to deepen our understanding of the principles of the circuit in the debugging process.
This line is in the form of the oscillation circuit by the cycle generated by the following principles:
- after the first charge, the capacitor C1 & C4 charging is complete.
- capacitors C2 & C3 will continue to charge.
- when the transistor Q1 & Q4 is turned on at the same time, it discharges the capacitor C1 & C4.
- capacitors C2 & C3 is fully charged, the transistor Q1 & Q4 will be closure, while also charging the capacitor C1 & C4 again.
- transistors Q2 & Q3 is turned on while the capacitor C2 & C3 will be discharged.
- By analogy, the flash of speed is the oscillation frequency, and the frequency is determined by the resistor R & capacitance C values.
- Board Size:70mm*110mm

Description:
 
This is a set of transmitter and receiver in one of the photoelectric sensor. The detection distance can be adjusted upon request. The sensor has a detection distance and the visible light interference, cheap, easy to assemble, easy to use features of robot obstacle avoidance, and assembly line piece can be widely used in many occasions.
Electrical Characteristics:
U: 5VDC
I: The 100mA
Sn :3-80CM
Size:
Diameter: 17MM
Sensor length: 45MM
Lead Length: 45CM
Applications:
A production line goods automatic counting device
2, multi-functional reminder
3, the maze robot
Red: connected 4.5-5V power supply high
Yellow: connected microcontroller output TTL level to the microcontroller
Green: GND 0V power low
 
Photoelectric sensor (photoelectric switch) NPN normally open
Model: E18-D80NK the.
The technical parameters of the photoelectric switch E18:
1, the output current, output, DC / SCR / Relay Control: 100mA/5V supply
2 Current consumption DC <25mA
3, response time <2ms
4, point angle: more than15 °, the effective distance is adjustable from 3-80CM
5,To detect objects: a transparent or opaque body
6, the working environment temperature: -25 °C ~ 55 °C
7, the standard detection object: sunlight 10000LX is the following incandescent 3000LX below
8, Case Material: Plastic
 

Chip Type: TEC1-12706
 
External dimensions: 40 * 40 * 3.75mm
Internal resistance: 2.1 ~ 2.4 (ambient temperature of 23 ± 1 'C, 1kHZ Ac test)
The maximum temperature difference:  Tmax (Qc = 0) above 59 'C.
Working current: Imax = 4.3-4.6A (rated at 12V)
Rated voltage: 12V (Vmax: 15V starting current 5.8A)
Cooling power: Qcmax 55W
Working environment: temperature range -55 'C ~ 83'C (high ambient temperature drop directly affect the cooling efficiency)
Description :
Get ice cold in minutes or heat to boiling by simply reversing the polarity, used for numerous applications from CPU coolers to alternate power sources, or even for your own
custom car drink warmer/cooler.
Since they consit primarily of semiconductor material sandwiched between ceramic plates and have no moving parts
These devices must be used in conjunction with a heat sink to avoid burned
Each device is full inspected and tested
Fitted with 6-inch insulated leads
 
 
 
 

1.Parameter characteristics
 
Power Supply 3.7-5V
SNR 90dB
THD N -70dB
Crosstalk -86dB
DNR 91dB
Support Profile A2DP/AVCTP/AVDTP/AVRCP/HFP
LOS >15m
 
 
2.Interface details
 
USB powered Universal Micro USB 5V power supply
3.7-5V Supply Pad External 3.7-5V lithium battery power conversion
LED indicator Bluetooth mode long blue light
3.5mm stereo audio interface Standard 3.5mm interface, output stereo sound source, plug in headphones, connect amplifiers and other devices
 
 
Instructions:
 
 
After the power is turned on, the blue indicator lights up and enters the Bluetooth mode; the English “The bluetooth device is ready to pair” is displayed, indicating that the Bluetooth mode is entered and waiting for pairing; the “XY_BT” searched by the mobile phone Bluetooth is the device name of the decoding board. , Click on the connection, the decoder board prompts "The bluetooth device is connected successfully", indicating that the decoder board and the mobile phone are connected successfully, you can play music. As shown below

Notice: The new tracking number for China Post Ordinary Small Packet Plus can be traced only befor it arrive the airport of your country,please choose China Post Air Mail if you want a full tracking info.Tracking info of  China Post Ordinary Small Packet Plus can be check here: www.17track.net/en

Specifications: Model Number: XH-M609
Supply Voltage: DC 12-36V
Output Voltage: Equal to supply voltage
Control Precision: 0.1V Power: ＜1.5W
Application Range: Storage Batteries; Lithium Batteries
Size: 5.7x4.2cm/2.24x1.65"
Quantity: 1 Pc
Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid
Due to the difference between different monitors, the picture may not reflect the actual color of the item.

Notice: The new tracking number for China Post Ordinary Small Packet Plus can be traced only befor it arrive the airport of your country,please choose China Post Air Mail if you want a full tracking info.Tracking info of  China Post Ordinary Small Packet Plus can be check here: www.17track.net/en

Notice: The new tracking number for China Post Ordinary Small Packet Plus can be traced only befor it arrive the airport of your country,please choose China Post Air Mail if you want a full tracking info.Tracking info of  China Post Ordinary Small Packet Plus can be check here: www.17track.net/en

Notice: The new tracking number for China Post Ordinary Small Packet Plus can be traced only befor it arrive the airport of your country,please choose China Post Air Mail if you want a full tracking info.Tracking info of  China Post Ordinary Small Packet Plus can be check here: www.17track.net/en

 
Type: without touch panel
Size:2.4" SPI Serial
Display area:36.72(W)X48.96(H)mm
Driver element: a-Si TFT active matrix
Pixel arrangement: RGB vertical stripe
Driver IC: ILI9341
Backlight: White LED
Viewing Direction: 6 o'clock
Color Depth: 262K/65K
Resolution (dots): 240RGB*320Dots
5V compatible, use with 3.3V or 5V logic
Need at least 4 IOs from your MCU
With PCB plate (including power supply IC, SD), compatible with 5110 interface