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0.28 Inch 2.5V-40V Mini Digital Voltmeter Voltage Tester Meter Red/Blue/yellow/green LED Screen Electronic Parts Accessories

LM2596 LM2596S DC-DC 4.5-40V adjustable step-down power Supply module
Name : LM2596 DC-DC Buck module
Input voltage :4V ~ 35V
The output voltage : 1.23V ~ 30V
Output Current :3A( Max)
Conversion efficiency:92% ( MAX )
Output ripple: <30mV
Switching frequency: 150KHz
Working temperature: -forty Five~ 85
Size :43mm * 21mm * 14mm(Long*Width*Hight)
Features:
1. the range of input voltage: 3.2 V to 40 V dc (input voltage must be higher than to the output voltage of 1.5 V above. Can't booster)
2. the range of output voltage: 1.25 V dc to 35 V voltage adjustable, high efficiency (92% ) largest maximum output current is 3A.
Instructions:
1. Power (3-40V), power indicator light, the module is working properly.
2. Adjust the blue potentiometer knob (clockwise rotation generally boost,counter-clockwise rotationTurn down) and reach with a multimeter to monitor the output voltage required voltage.
Note:
Current work long hours is recommended for use in less than 2.5A, while adding bulkHeat sink (10W output above),because it is the step-down module, in order to ensure stable output Set,please keep the minimum 1.5V differential.

Wifi Bluetooth Development Board Antenna ESP32 ESP-32 REV1 CH340 CH340G MicroPython Micro USB Lithium Battery Interface
 
Feature
wireless online
Bluetooth
4MB flash
Lithium battery interface, 500mA maximum charging current

MPU9250 BMP280 module
(Three-axis gyroscope triaxial accelerometer triaxial magnetic field pressure)
Module Model: GY-91
Use chip: MPU-9250 BMP280
Power supply: 3-5v (internal low dropout regulator)
Communication: standard IIC / SPI communications protocol
-Chip 16bit AD converter, 16-bit data output
Gyroscopes range: ± 250 500 1000 2000 ° / s
Acceleration range: ± 2 ± 4 ± 8 ± 16g
Field range: ± 4800uT
Pressure range: 300-1100hPa
Using Immersion Gold PCB, machine welding process to ensure quality
2.54mm pitch
Module size 14.3mm * 20.5mm

This is a super mini Solar Lipo charger based on the CN3065 - a single lithium battery charge management chip.
This Solar charger provide you with the ability to get the most possible power out of your solar panel or other photovoltaic device and into a rechargable LiPo battery. Set-up is easy as well, just plug your solar panel into one side of the Solar charger and your battery into the other and you are good to start charging!
The output of the Solar Charger is intended to charge a single polymer lithium ion cell. The load should be connected in parallel with the battery. By default, the Solar charge comes set to a maximum charge current of 500mA with a maximum recommended input of 6V (minimum 4.4V). It’s recommended that batteries not be charged at greater than their capacity rating.
Features:
Solar panel input: 4.4-6V
Max charge current: 500mA
Interface: 2-pin JST connectors(or PH2.0)
Short circuit protection
Continuous Charge Current Up to 500mA
Battery status indication ( Red : Charging , Green: Charged )
Support USB Charge (Micro-USB Connector)
Size:2cm x 4cm

Name: HMC5883L module (triaxial magnetic field module)
Model: GY-271
Using chips: HMC5883L
Power supply: 3-5v
Communication mode: IIC communication protocol
Measurement range: 1.3-8 Gauss

Description:
Two-axis key joystick sensor module by the use of PS2 rocker potentiometer, with (X, Y) 2-axis analog output, (Z) 1 button digital output. With the Arduino sensor expansion board can produce remote control and other interactive works. In addition, this product in order to allow customers to more easily with the arduino expansion board and other standard interfaces, in the design of the X, Y, Z axis of the circuit are separate leads, the user can use 3-pin ARDUINO special line really plug into the expansion board .
Product performance:
1. Input voltage range: DC 3.3V to 5V
2. Output signal: the module special two-way analog output and a digital output interface, the output value corresponding to (X, Y) biaxial offset, the type of analog; keys that the user press the Z axis, Its type is digital switch.
3. Arduino controller can be programmed, the sensor expansion board plug, complete with creative remote interactive works.
4. Cross joystick is a bi-directional 10K resistor, with the rocker in different directions, the tap resistance with the change. This module uses 5V power supply, the original state of X, Y read voltage of 2.5V or so, when pressed with the arrow direction, the read voltage value increases with the maximum to 5V; arrows in the opposite direction to press, read the voltage decreases , The minimum is 0V.

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 SD Card module can make your SD application more easier and simple.It is easily interfaced as a peripheral to your arduino sensor shield module.Through programming, you can read and write to the SD card using your arduino.
Features:
Can be used for SD Card more eaisly, such as for MP3 Player, MCU/ARM system control.
All SD SPI pins output, MOSI, SCK, MISO and CS.
Package includes:
1 X SD CARD MODULE

 
be careful:
 
 
 
This protection plate can not be used for lithium iron phosphate battery, hernia lamp, electric drill battery pack, electric fish machine battery pack, electric bicycle battery pack, 775 (4a) motor or above, 1W fish eye LED lamp. Customers who purchase the above combination please pay attention!.
 
 
 
The properties of the lithium battery protection board are as follows:
 
 
 
Model: hx-2s-jh20 overcharge voltage range: 4.25-4.35v ± 0.05v
 
 
 
Size: 46.7 * 23 * 3.15mm, over discharge voltage range: 2.5-3.0v ± 0.05v
 
 
 
Upper limit working current: 10a, working temperature: - 40 - 50 ℃
 
 
 
Upper limit instantaneous current: 20A storage condition: - 40 -- 80 ℃
 
 
 
Static current: less than 10uA effective life: more than 50000 hours
 
 
 
Internal resistance: less than 300m Ω, short circuit protection: can be protected, need to be charged for recovery
 
 
 
Charging voltage: 8.4v-9v
 
 
 
The size of the protection board and device description;
 
 
 
The size of the protection plate is 46.7 * 23 * 3.15mm
 
 
 
 
 
Description of welding points:
 
 
 
·B is connected to the positive electrode of the battery;
 
 
 
·B - connected to the negative pole of the battery;
 
 
 
·MB is connected to the connection point before battery 1 and battery 2;
 
 
 
·P is connected to the positive pole of charge / discharge end (shared by charging end / discharging end);
 
 
 
·P-connected to the negative pole of charge / discharge end (shared by charging end / discharging end).
 
 
 
Warm tips: the battery voltage, capacity and internal resistance should be matched well when combining the battery pack. The battery voltage is appropriate at the rated voltage of 3.7V. After the battery pack is assembled, there is no output, and it can be charged with 8.4v voltage.

Description:
Add an ear to your project with this well-designed electret microphone amplifier. This fully assembled and
tested board comes with a 20-20KHz electret microphone soldered on. For the amplification, we use the
Maxim MAX4466, an op-amp specifically designed for this delicate task! The amplifier has excellent power
supply noise rejection, so this amplifier sounds really good and isn't nearly as noisy or scratchy as other
mic amp breakouts we've tried!
This breakout is best used for projects such as voice changers, audio recordingmpling, and audio-reactive projects that use FFT. On the back, we include a small trimmer pot to adjust the gain. You can
set the gain from 25x to 125x. That's down to be about 200mVpp (for normal speaking volume about 6"
away) which is good for attaching to something that expects 'line level' input without clipping, or up to
about 1Vpp, ideal for reading from a microcontroller ADC. The output is rail-to-rail so if the sounds gets
loud, the output can go up to 5Vpp!
Using it is simple:
Connect GND to ground, VCC to 2.4-5VDC.
For the best performance, use the "quietest" supply available (on an for Arduino, this would be the 3.3V supply).
The audio waveform will come out of the OUT pin. The output will have a DC bias of VCC/2 so when its
perfectly quiet, the voltage will be a steady VCC/2 volts (it is DC coupled). If the audio equipment you're using
requires AC coupled audio, place a 100uF capacitor between the output pin and the input of your device. If
you're connecting to an audio amplifier that has differential inputs or includes decoupling capacitors, the
100uF cap is not required.
The output pin is not designed to drive speakers or anything but the smallest in-ear headphones- you'll need
an audio amplifier (such as 3.7W stereo amp) if you want to connect the amp directly to speakers. If you're
connecting to a microcontroller pin, you don't need an amplifier or decoupling capacitor - connect the OUT
pin directly to the microcontroller ADC pin.
For audio-reactive projects, we suggest using an FFT driver library which can take the audio input and 'translate' it into
frequencies.

LM2596 LM2596S DC-DC 4.5-40V adjustable step-down power Supply module
Name : LM2596 DC-DC Buck module
Input voltage :4V ~ 35V
The output voltage : 1.23V ~ 30V
Output Current :3A( Max)
Conversion efficiency:92% ( MAX )
Output ripple: <30mV
Switching frequency: 150KHz
Working temperature: -forty Five~ 85
Size :43mm * 21mm * 14mm(Long*Width*Hight)
Features:
1. the range of input voltage: 3.2 V to 40 V dc (input voltage must be higher than to the output voltage of 1.5 V above. Can't booster)
2. the range of output voltage: 1.25 V dc to 35 V voltage adjustable, high efficiency (92% ) largest maximum output current is 3A.
Instructions:
1. Power (3-40V), power indicator light, the module is working properly.
2. Adjust the blue potentiometer knob (clockwise rotation generally boost,counter-clockwise rotationTurn down) and reach with a multimeter to monitor the output voltage required voltage.
Note:
Current work long hours is recommended for use in less than 2.5A, while adding bulkHeat sink (10W output above),because it is the step-down module, in order to ensure stable output Set,please keep the minimum 1.5V differential.

Product model:0.5/0.6/0.7/0.8/0.9/1/1.1/1.2/1.4/1.5
10 Kinds Stainless Steel Needle Set

Detecting range:
3cm-4M
Best in 30 degree angle
Electronic brick compatible interface
5VDC power supply
Breadboard friendly
Dual transducer
library ready
Specification:
Working Voltage: 5V (DC)
Static current: Less than 2mA.
Output signal: Electric frequency signal, high level 5V, low level 0V.
Sensor angle: Not more than 15 degrees.
Detection distance: 2cm-450cm.
High precision: Up to 0.3cm
Working tempter:-20C___ 60C
Weight: 10g
Size: 45x 21mm (L x W)
SR04Connector 4Pin:
VCC
Echo
OUT
GND
SRF05Connector 5Pin:
VCC
Trig (T)
Echo(R)
OUT
GND

Features:
Material: PCB
Font size guide, trace-width diagram, and a set of AWG-sized drills
Centimeter side: 0.1cm marks
Package included:
1 x PCB Reference Ruler v2 - 6" PCB Packaging Units for Arduino Electronic Engineers

 
Specification:
Brand new and high quality.
Color: Gray.
Long service life and high reliability.
Highly reliable, compact size designed to offer users maximum simplicity.
Fast switching.
Reduced electromagnetic interference.
Output voltage: AC 24-380V.
Output current: 40A.
Input voltage: DC 3-32V.
Control Method: DC to AC.
Mounting Method: Bolts fixed.
Size:6.5cm x 4.5cm x 2.2cm - 2.56inch x 1.77inch x 0.87inch.
1PCS 24V-380V 40A 250V SSR-40 DA Solid State Relay Module 3-32V DC To AC

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

L293D is a monolithic integrated, high voltage, high current, 4-channel driver.Basically this means using this chip you can use DC motors and power supplies of up to 36 Volts, thats some pretty big motors and the chip can supply a maximum current of 600mA per channel, the L293D chip is also what's known as a type of H-Bridge. The H-Bridge is typically an electrical circuit that enables a voltage to be applied across a load in either direction to an output, e.g. motor.
- 2 interface for 5V Servo connected to For high-resolution dedicated timer - no jitter!
- Can drive 4 DC motors or 2 stepper motors or 2 Servo
- Up to 4 bi-directional DC motors with individual 8-bit speed selection
- Up to 2 stepper motors (unipolar or bipolar) with single coil, double coil or interleaved stepping.
- 4 H-Bridges: per bridge provides 0.6A (1.2A peak current) with thermal protection, can run motors on 4.5V to 36V DC
- Pull down resistors keep motors disabled during power-up
- reset button
- 2 external terminal power interface, for seperate logic/motor supplies
- Tested compatible for Mega, Diecimila & Duemilanove

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

100pcs B0505S-1W 5V to 5V converter DC DC power module converter 1000VDC Isolation

Product name

ATX power supply board

Model

XH - M229

Compatible with the port

ATX (compatible with partial BTX type)

The PIN number

24 pin

Switch

Yes

Number of sets of output

Four sets of different voltages

Size

48 * 128 * 30 mm

Productfeature:
For the convenience of customers!The input voltage of this module is     3.3V / 5V    , which is more convenient for development and use!
VL6180X proximity, gesture and ambient light sensing (ALS) module.
Slider switch controlling 2 functions:
Ranging measurement, beyond 400mm.
Ambient light sensing, up to 100 kLux1.
4-digit display, displaying either the distance of a target from the proximity sensor, or the lux value from the ambient light sensing (ALS).
Excellent ranging accuracy, independent of the reflectance of the target.
Basic gesture recognition application can be developed with one or multiple VL6180X modules.
Compatible with STM32 Nucleo board family.
Equipped with ArduinoTMUNO R3 connector.
RoHS compliant.
After many experiments, we have a complete routine!If you need complete information, please buy the product to contact me!I will send it to you.
Wiring description:
1. The digital output of GPIO0 is 10 pins;
2.SDA pin of SDA connector development board;
3.SCL pin of SCL joint development board;
4. Power supply can be connected to 3.3V or 5V.
Instructions for module use:
1. Download the provided routine code to the WAVGAT development board;
2. Connect the VL6180 module with the development board according to the wiring instructions;
3. Open the serial port monitoring window of Arduino IDE;
4. When the sensor is not covered in front, the serial port monitoring window displays 255;
5. When there is occlusion, the distance is shown as measured distance and the unit is mm.

 
 
The FT232R is a USB to serial UART interface
A low-cost way to add USB capability to microcontrollers. Use this to give your own breadboard For USB capability for bootloading or downloading sketches.
RXD/TXD transceiver communication indicator
Includes over-current protection, using a 500ma self-restoring fuse
This board includes a DTR pin needed to auto-reset when downloading to your device.
Color: Red
USB Power Supply: 3.3V or 5V
 

CJMCU-ADS1115 ultra-compact 16-precision ADC ADC module development board
FEATURES DESCRIPTION
23 ULTRA-SMALL QFN PACKAGE: The ADS1113, ADS1114, and ADS1115 are
2mm × 1,5mm × 0,4mm precision analog-to-digital converters (ADCs) with 16
WIDE SUPPLY RANGE: 2.0V to 5.5V bits of resolution offered in an ultra-small, leadless
LOW CURRENT CONSUMPTION: QFN-10 package or an MSOP-10 package The ADS1113 / 4/5 are designed with precision, power, and.
Continuous Mode: Only 150A ease of implementation in mind The ADS1113 / 4/5.
Single-Shot Mode:. Auto Shut-Down feature an onboard reference and oscillator Data are
PROGRAMMABLE DATA RATE: transferred via an I2C-compatible serial interface; four
8SPS to 860SPS I2C slave addresses can be selected. The
INTERNAL LOW-DRIFT ADS1113 / 4/5 operate from a single power supply
VOLTAGE REFERENCE ranging from 2.0V to 5.5V.
INTERNAL OSCILLATOR The ADS1113 / 4/5 can perform conversions at rates
INTERNAL PGA up to 860 samples per second (SPS). An onboard PGA is available on the ADS1114 and ADS1115 that
I2C INTERFACE: Pin-Selectable Addresses offers input ranges from the supply to as low as
FOUR SINGLE-ENDED OR TWO ± 256mV, allowing both large and small signals to be
DIFFERENTIAL INPUTS (ADS1115) measured with high resolution. The ADS1115 also
features an input multiplexer (MUX) that provides two PROGRAMMABLE COMPARATOR differential or four single-ended inputs.
(ADS1114 and ADS1115)
The ADS1113 / 4/5 operate either in continuous
APPLICATIONS conversion mode or a single-shot mode that
PORTABLE INSTRUMENTATION automatically powers down after a conversion and greatly reduces current consumption during idle
CONSUMER GOODS periods. The ADS1113 / 4/5 are specified from -40 ° C
BATTERY MONITORING to 125 ° C.

overcharge detection voltage :4.25±0.025V
overcharge Lift the voltage:4.15±0.05V
over discharge detection voltage :2.50±0.08V
over discharge Lift the voltage:3.00±0.1V
overcurrent current:20-30A
working current:15A(Natural cooling 10A, add heat sink 15A, the maximum instantaneous current 30A)
Remove protection condition automatic recovery, without activatio
 
 
Termination conditions:the release of protection condition then automatic recovery, without activation (optional charger to activate)
Main functions: the overcharge protection function, overdischarge protection, short-circuit protection, over current protection.
Working temperature: -40~ 85 degrees (high temperature environment and please strengthen radiating)
Connection: welding output
Module size: 50mm*22mm*4mm
Applications:
The protective board can be used as the nominal voltage of 14.4V, 14.8V, 16.8V four series of polymer lithium battery group, four series of 18650 lithium batteries as overcharge and over discharge, short circuit protection. Without the activation function in the power application for high instantaneous current,and in inverter application for avoid false triggering protection.So it will use more convenient.
Note:No part design on the back, can be attached to the heat sink to ensure high current work situation for a long time.
 

Description:
Two-axis key joystick sensor module by the use of PS2 rocker potentiometer, with (X, Y) 2-axis analog output, (Z) 1 button digital output. With the Arduino sensor expansion board can produce remote control and other interactive works. In addition, this product in order to allow customers to more easily with the arduino expansion board and other standard interfaces, in the design of the X, Y, Z axis of the circuit are separate leads, the user can use 3-pin ARDUINO special line really plug into the expansion board .
Product performance:
1. Input voltage range: DC 3.3V to 5V
2. Output signal: the module special two-way analog output and a digital output interface, the output value corresponding to (X, Y) biaxial offset, the type of analog; keys that the user press the Z axis, Its type is digital switch.
3. Arduino controller can be programmed, the sensor expansion board plug, complete with creative remote interactive works.
4. Cross joystick is a bi-directional 10K resistor, with the rocker in different directions, the tap resistance with the change. This module uses 5V power supply, the original state of X, Y read voltage of 2.5V or so, when pressed with the arrow direction, the read voltage value increases with the maximum to 5V; arrows in the opposite direction to press, read the voltage decreases , The minimum is 0V.

ESP8266 10A 220V Network Relay WIFI Module
Specifications:
Model: ESP8266
Color: Green
Size(L*W*H):65 x 40 x 18 mm
ISM: 2.4 GHz
PA: 25 dBm
Relay voltage: 220 V
Relay Current: 10 A
Input voltage: DC 7 V~30 V
Input overvoltage protection: Yes
Input overcurrent protection: Yes
Features:
1.More safe with relays PCB pin anti-climb design.
2.With ESP8266 Wifi module,4-layers board design.
3.One output status indicator, one input status indicator.
4.220V 10A relay, one normally open, one normally closed.
5.One way optocoupler isolation input, TVS input protection.
6.Access control server via TCP CLIENT mode Via HTTP protocol control.High-current terminals.
7.Input overvoltage protection, input with TVS, when voltage exceeds 33V, automatic protection will operate.

Description:
The whole network smallest adjustable boost module can be easily installed in a variety of small equipment.
The module supports MicroUSB input, a USB charger or mobile power supply can easily get to it 9V, 12V, 15V, 18V, 24V, easy to use.
Wide input and output voltage, high conversion efficiency.
Maximum output current: 2A (recommended for use within 1A)
Input voltage: 2 v ~ 24 v
Maximum output voltage:> 28 v (recommended for use within 26V)
Efficiency:> 93%
Size: 30mm * 17mm * 14mm (L * W * H)
This module is a step-up module, the output voltage is greater than the input voltage.
Peak current output current does not exceed 2A.
 
Note:
1. Input voltage should not exceed the maximum input voltage
2. Peak current output current does not exceed 2A
3. When the module output voltage can not be adjusted, always equal to the input voltage when the first 20 laps counterclockwise rotary potentiometer or more, then you can use the module properly regulate the voltage. Surge mode: potentiometer face chest, counterclockwise turn boost!
 
 
 

Description:
Brand new and high quality
LCD display module with blue blacklight
Wide viewing angle and high contrast
Built-in industry standard HD44780 equivalent LCD controller
Commonly
used in: copiers, fax machines, laser printers, industrial test
equipment, networking equipment such as routers and storage devices
LCM type: Characters
Can display 2-lines X 16-characters
Operate with 5V DC
Module dimension: 80mm x 36mm x 12mm
Viewing area size: 64.5mm x 16mm

Product name

ATX power supply board

Model

XH - M229

Compatible with the port

ATX (compatible with partial BTX type)

The PIN number

24 pin

Switch

Yes

Number of sets of output

Four sets of different voltages

Size

48 * 128 * 30 mm

100PCS MP1584EN 3A Ultra-Small Size DC-DC Step Down Supply Module Adjustable power step-down descending output module
型号/名称

超小DC-DC降压模块
输入电压

4.5V~28V
输出电压

0.8V~20V
输出电流

3A（最大）
转换效率

92% （最高）
输出纹波

<30mV
开关频率

1.5MHz（最高），典型1MHz
工作温度

-45℃~ 85℃
尺寸大小

22mm * 17mm * 4mm（长*宽*高）

Ga12-n20 intelligent car 3v6v12v micro DC gear motor low speed motor
3V: 35 rpm
6V: 70 rpm
9V: 105 rpm
12V: 140 rpm
PS: the same product. Different voltage, different speed

 
Product Details
FM Stereo Radio Module RDA5807M RRD-102V2.0 Wireless Module Pro New for Arduino
Article-Nr.:5400777
Product Details:
Stereo Module
Condition: New
Overview: 
"RRD-102V2.0" stereo radio module (FM Stereo radio Module) high sensitivity, low power consumption,ultra- small size of the FM stereo radio module.Using RDA Microelectronics of RDA5807M(or RDA5802NM),this circuit fewer external components,the noise factor is minimal. Small size,low power consumption,low cost,simple application,the use of a wide range of advantages.Is an easy-to-use and possessed highly cost-effective single-chip FM stereo radio module.
A: Move DVD,TV,MP3,MP4 and other built-in FM wide-band wireless receiver module. 
B: mining,business,campus,residential,tourist areas and other public places,stereo FM radio
system. 
C: wireless audio and wireless stereo headset functionality. 
D: GPS navigation, TV broadcasting systems and other wireless FM radio.
E: high-end game consoles and wireless audio electronic toys.
F: mobile phones,mobile phones,intercom systems,mobile radio devices and other stereo radio.
G: PDAS and Notebook PC and other peripheral applications.
 
Function:
A: using a common 102BC module package,users can directly replace the use,without changing the circuit design. 
B: high sensitivity,low noise,anti-interference ability,very few external components,small size (11*11.2MM Max),extremely simple to use. 
C: 76-108MHz FM band worldwide compatible(76-91MHz,including Japan,America and Europe 87.5-108.5MHz). 
D: I2C serial data communications bus interface,support for external reference clock input.
E: COMS technology fully integrated single-chip integrated circuits,power consumption is minimal.
F: built-in high-precision A/D(analog) and digital frequency synthesizer.
G: built-in LDO regulator,low power,wide voltage range(2.7-3.6VDC). 
H: built-in noise reduction, soft mute,bass boost circuit design.
I: 32 load high power audio output,headphone connections are direct,no external audio driver amplifier. 
J: the application is simple,low cost,cost-effective.
Color : show as pictures
PLS NOTE that due to lighting effects, monitor's brightness / contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item! 
 
 
 

multi-channel transceiver @ 868MHz
support FSK, GFSK, ASK / OOK and MSK
configurable data rate: 1.2k to 500kps
independent 64-byte RX and TX data FIFOs
support radio wake
supports automatic clear channel assessment
efficient SPI Interface
low power supply (1.8V-3.6 V)

1. This module adopts high-performance imported chip, and its performance is better than the general module.
2. Input any DC voltage from 0.9V to 5V, and output 5V DC voltage stably. A single AA battery can output up to 200 ~ 300mA current, and two AA batteries can output 500 ~ 600mA current. It can supply power for your mobile phone, camera, MCU and digital products
3. Industrial grade temperature range: - 40 ℃ - 85 ℃
4. High conversion efficiency, up to 96%
5. With USB motherboard, it is widely used
6. Ultra small volume (PCB board 25 mm * 18 mm) for installation in various small equipment
7. With work indicator

Pack:
DS1307 I2C real-time clock chip (RTC)
24C32 32K I2C EEPROM memory
Solve the problem DS1307 with backup battery can not read and write.
Fully charged, it can provide the DS1307 timing 1.
Compact design, 27mm * 28mm * 8.4mm
Leads to the a DS1307 clock pin, to provide the clock signal for the microcontroller.
Can be cascaded to other I2C devices.

0.96 inch oled IIC Serial White OLED Display Module 128X64 I2C SSD1306 12864 LCD Screen Board for Arduino
 
Interface type: IIC interface

Pin definition: GND, VCC, SCK, SDA

1:GND(OLED power supply)

2:VDD (OLED 3.3~5V)

3:SCK(OLED IIC Clock line)

4:SDA(OLED IIC Cable

 



 

3MM RED 20PCS               5MM RED 20PCS
3MM GREEN 20PCS           5MM GREEN 20PCS
3MM BLUE 20PC S             5MM BLUE 20PCS
3MM WHITE 20PCS           5MM WHITE 20PCS
3MM YELLOW 20PCS        5MM YELLOW 20PCS

Output Current : 1.5A ( minimum ), 2.2A ( typical value )
Input-output voltage difference (VI-VO): 40Vdc ( max )
Adjustable output voltage range : 1.2 ~ 37V
Working temperature : -55 ° C to 150 ° C
Current output : 1.5A
Voltage Input : 4.2 ~ 40 V
Operating temperature : 0 ° C ~ 125 ° C
Characteristic frequency : 100 (MHz)
Module size : 35.6 (mm) x16.8 (mm)
Input mode : VIN input positive level , GND input negative
Output : VOUT output positive level , GND output negative

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W5100 is a versatile single-chip network interface chip , internal integrated 10/ 100 Ethernet controller , mainly used in high integration , high stability , high performance and low cost of embedded systems. W5100 can be achieved using an Internet connection without an operating system . W5100 is compatible with IEEE802.3 10BASE-T and 802.3u 100BASE-TX. W5100 internal integration of the full hardware , and after years of market-proven TCP / IP protocol stack, Ethernet media transport layer (MAC) and physical layer (PHY). W5100 does not need to consider the use of Ethernet control port requires only a simple (Socket) programming.
Product Features
Multiple interface options: direct bus , indirect bus and SPI bus ;
Support for hardware TCP / IP protocol stack, supports TCP, UDP, ICMP, IGMP, IPv4, ARP, PPPoE.
Up to four independent ports ;
Integrated 16KBYTE receive buffer ;
A variety of information indicates output, including RX, TX, Full / Duplex, Colision, Link, Speed;
Supports auto-polarity (DMI / MDIX);
3.3V power supply , IO signal compatible with 5V voltage ;
built-in Ethernet port , double 2 * 14 2.0mm pin ;
The official  Ethernet -compatible library .

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This SD Card module can make your SD application more easier and simple.It is easily interfaced as a peripheral to your arduino sensor shield module.Through programming, you can read and write to the SD card using your arduino.
Features:
Can be used for SD Card more eaisly, such as for MP3 Player, MCU/ARM system control.
All SD SPI pins output, MOSI, SCK, MISO and CS.
Package includes:
1 X SD CARD MODULE