Raspberry Pi is a great board, you can use for learn hardware and software, for playing your favourite retrogame (and i like very much !!!), its your best friend in today's world of micro computer.
I design the raspundercontrol board because i think the only lack in many single board computer is the famous and glorious power button like a home commputer.
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 night...
The board uses an attiny85 chip for powering and interact 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 to a double-click another function on RPI.
I test my idea with my best friend breadboard and my girlfriend board arduino
I started to think the best way for powering the RPI, 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, very useful if you plan to use your RPI in a standalone project.
Short press is a power off, long press is a reboot. As an update, you can also control your board with a remote.
Raspundercontrol simply connect to the RPI GPIO headers, no wire or other stuff:
The board take power from its micro USB plug or from the +5V external power supply jumper
A tiny script written in python interact with the raspundercontrol board. 2 GPIO are used, GPIO17 for the watchdog and GPIO18 for shutdown/reboot command.
The on board led has just 3 state:
Fast Blink. Power Up the RPI or reboot state
Slow Blink. Power off state
Fixed. All OK !!! and you can use your RPI
The attiny85 chip has no custom bootloader, its a pure Arduino bootloader. You can simply flash it with your arduino as an ISP or even with your Raspberry PI board.
As an update, i released the out-of-the-box version, useful if you don't have free space on RPI GPIO header
Here's the specs:
- MicroUSB input
- Standard USB plug output that provide power to your RPI trought simple USB cable
- 6 pins header that provide external power supply, external power button & 2 last pins to interact with your RPI
- 2 LED, power LED like the inbox version and another LED for supply input power
Because this board is not directly connected to the GPIO header, you can reassign the standard GPIO17 and GPIO18 to what you want.
Now RaspUnderContro board comes with infrared receiver feature. You can control your RPI by a remote. Check the Update.
If the project got founded, you can choose between the inbox version or the out-of-the-box version, same price.
My main goal is to ensure that the raspundercontrol board is cheap and tiny enough to be used in all raspberry pi project. Once the campaign over, i ensure the raspundercontrol board avaiable by online hardware retailers !!
Open Source Hardware and Software
If the project got founded, all the schematic, software and anything you need to build or hack your raspundercontrol board will be released.
4K Euros: Everyone can choose the color of led (RED, BLUE, GREEN, YELLOW and WHITE).
10K Euros: All the board are shipped with a 5V 2A micro USB power supply.
15K Euros: Everyone can choose the color of the board (RED, BLUE, GREEN, BLACK, WHITE, YELLOW).
All the pledges starting from 17 euros have 1 remote per board.
GET YOUR RASPUNDERCONTROL TODAY AND THANK YOU TO ALL!!!