RedStick Hookup Guide

Contributors: MTaylor
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Hardware Overview

The following lists the features of the RedStick:

  • A boost regulator providing 5V to the Atmega328p from an input range of 2 to 6 volts.
  • 16 MHz system clock (allowed because of the additional supply voltage)
  • Uno compatible in the Arduino IDE. Simply select the board "Arduino/Genuino Uno" and go!
  • USB end matches standard USB thickness and width.

What the RedStick is not:

  • A RedBoard -- it doesn't provide 3.3 volts, only 5.
  • A battery charger -- The RedStick turns off the battery when plugged into a USB port.

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Parts of the RedStick

The following table lists all of the pins on the RedStick and their functionality.

Pin Silk
Function Notes
TX Serial transmit
This is serial data coming out of the RedStick.
RX Serial Receive
This is serial data coming in
2 Digital
~3 Digital with PWM
4 Digital
~5 Digital with PWM
~6 Digital with PWM
7 Digital
9 Digital
~10 Digital / PWM / SS
Digital / PWM / MOSI
SPI bus
SPI bus
13 Digital / SCK / LED
SPI bus
A0 Digital / Analog
A1 Digital / Analog
A2 Digital / Analog
Digital / Analog
Digital / Analog / SDA
I2C bus -- some applications require pull-up
Digital / Analog / SCL
I2C bus-- some applications require pull-up
A6 Analog
Analog only!
A7 Analog Analog only!
Serial Receive
Electrically tied to RX
TXI Serial Transmit
Electrically tied to TX
Microprocessor Power (Boost output)
If using as input, supply regulated 5.0 v
GND Ground
+ Battery Positive
Supply 2.0 to 6.0 volts
- Battery Negative
This is also GND