Rasp Under Control

THINGS USED IN THIS PROJECT

Hardware components:
R8326274 01
Raspberry Pi 2 Model B

Rasp Under Control

STORY

About this project

Raspberry Pi is a great board, you can use to learn hardware and software or for playing your favourite retrogame (which I like very much!). It’s your best friend in today’s world of microcomputers.

I designed the raspundercontrol board because I think the only lack in many single board computers is the famous and glorious power button like a home computer. If you plan to use your RPi in a standalone project, RaspUnderControl is the perfect solution.

I started to design and test the circuit a few months ago – lots of beer and fun during these test nights.

Rasp Under Control

The board uses an ATTiny85 chip for powering and interacting with the RPi. The chip is programmed with Arduino IDE. you can hack and edit all the code for your needs. For example, you can change timing pressure of the button for reset function, or assign double-click to another function on RPi.

I tested my idea with my best friend, breadboard, and my girlfriend board, Arduino.

I started to think about the best way for powering the RPi and made a lot of tests with various micro relays. But I realized that the best way for my project is to use a MOSFET as a relay.

With this solution, I keep the RaspUnderControl board tiny enough to connect to the RPi, and you can continue to use your favorite RPi enclosure.

With RaspUnderControl you have a simple and easy power/reboot button, which is very useful if you plan to use your RPi in a standalone project.

Short press is power off, long press is reboot. As an update, you can now also control your board with a remote. Simple.

Raspundercontrol simply connects to the RPi GPIO headers – no wire or other stuff:

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