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103030031 Raspberry Pi Motor Board v1.0
US$83.65
Features: Operating Voltage: 6V ~ 28V. DC/DC output: 5V 1000mA @ "5V" pin. Output Current(For Each Channel ): 2A (continuous operation) / 5A(peak). Output Duty Range: 0%~100%. Output short-circuit protection (short to VPWR or GND). Over-current limiting (regulation) via internal constant-off-time PWM. Temperature dependant current limit threshold reduction. Raspberry compatible.
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PI2-SWITCH Micro USB Cable w/ Switch for Raspberry Pi
US$7.49

Just hook up the standard USB end to 5V 2A USB port power supply ( like ABRA's DC-5200-USB) and the Micro B end to a Raspberry. No need to unplug your Raspberry Pi; just use the on/off switch on the cable. Can be used for any single-board computer with a Micro USB connection.

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101020017 Grove - Rotary Angle Sensor
US$4.97
Produces analog output between 0 and Vcc (5V DC with Seeeduino) on its D1 connector. The D2 connector is not used. The angular range is 300 degrees with a linear change in value. The resistance value is 10k ohms, perfect for Arduino use.
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COM04053P Grove - Green LED
US$3.43
The ingenious PCB design enables you to bend the LED to any position you want, which makes it easy to use it standalone, horizontal or Panel Mount.
Delivery within 2-3 weeks
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Adafruit RGB Matrix HAT + RTC for Raspberry Pi - Mini Kit
US$39.91
You can now create a dazzling display with your Raspberry Pi Model Zero/A+/B+/Pi 2 or Pi 3 with the Adafruit RGB Matrix HAT. This HAT plugs into your Pi and makes it super easy to control RGB matrices such as those we stock in the shop and create a colorful scrolling display or mini LED wall with ease.
Delivery within 2-3 weeks
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PI-KEY-W Miniature Wireless USB Keyboard with Touchpad
US$31.80
This is a wonderful combo, 2.4GHz Mini Wireless QWERTY keyboard, TouchPad combo, with USB interface adapter for the lectuer, sales manager, presenter and others, from within a 15' radius make a presentation and operate PC wirelessly. Change slides and screen options, write on the screen, emphasize words and objects just by using this wireless mini keyboard and mouse with touchpad.
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PRT-13032 SparkFun Breadboard Power Supply Stick - 5V/3.3V
US$20.93
This is a very simple board that takes a 6-12V input voltage and outputs a selectable 5V or 3.3V regulated voltage. All headers are 0.1" pitch for simple insertion into a breadboard.
Delivery within 2-3 weeks
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DEV-13298 Bare Conductive Touch Board
US$124.99
This is an easy-to-use Arduino@Heart board that gives you the ability to turn almost any material or surface into a sensor. Each Touch Board offers 12 electrodes for your a conductive ink or other type of connector that can be drawn or attached to create light switches, musical instruments, or custom interactive surfaces all through the Arduino IDE.
Delivery within 2-3 weeks
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2749-POLOLU Stackable 0.100″ Female Header with Extra 0.3″ Spacer: 2x20-pin, Straight
US$4.53

This extra-tall stackable 40-pin female header features two rows of 20 pins spaced with a 0.1″ (2.54 mm) pitch. It includes three 0.1″-thick spacers for additional clearance, and the extended pins allow multiple units to be stacked as popularized on Arduino shields. 

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2348-ADA Adafruit DC & Stepper Motor HAT for Raspberry Pi - Mini Kit
US$34.65
This Raspberry Pi add-on is perfect for any motion project as it can drive up to 4 DC or 2 Stepper motors with full PWM speed control. This chip handles all the motor and speed controls over I2C. Only two pins (SDA & SCL) are required to drive the multiple motors, and since it's I2C you can also connect any other I2C devices or HATs to the same pins.
Delivery within 2-3 weeks
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2024-ADA Adafruit 12 x Capacitive Touch Shield for Arduino - MPR121
US$19.25
This touch-able add on shield for Arduinos will inspire your next interactive project with 12 capacitive touch sensors.
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2341-ADA Adafruit Audio FX Mini Sound Board - WAV/OGG Trigger 16MB Flash
US$29.95

The fastest way to add audio effects to a project, with a small footprint. We think this is the best sound board for props and costumes! The Sound Board has a lot of amazing features that make it the easiest thing ever: No Arduino or other microcontroller required! It is completely stand-alone, just needs a 3 to 5.5VDC battery, Small - only 1.5" x 0.9", and much more.

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BOB-13021 SparkFun RJ45 MagJack Breakout
US$8.47
This is the SparkFun RJ45 MagJack Breakout, a simple board that will provide you with a way to put an ethernet port into your breadboard. The SparkFun RJ45 MagJack Breakout is the same one found in our very own mbed Starter Kit and breaks out each pin from the ethernet jack.
Delivery within 2-3 weeks
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1449363338 Make: Getting Started with Arduino: The Open Source Electronics Prototyping Platform (Paperback)
US$29.95
Arduino is the hot open source prototyping platform for artists, hobbyists, students, and anyone who wants to create interactive physical environments. Getting Started with Arduino is co-authored by Arduino co-founder Massimo Banzi, and incorporates his experience in teaching, using, and creating Arduino. 262 Pages.
Delivery within 2-3 weeks
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1449360665 Make: Basic Arduino Projects: 26 Experiments with Microcontrollers and Electronics (Paperback)
US$27.99
This companion book to MakerShed's Ultimate Arduino Microcontroller Pack provides 26 clearly explained projects that you can build with this top-selling kit right away--including multicolor flashing lights, timers, tools for testing circuits, sound effects, motor control, and sensor devices.
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115 - 129