Contents - Raspberry PI Community Projects

line in it for commands. The interface is a simple ASCII-protocol via the serial port. One
prototype exist so far. It also has five own GPIO-pins that is not supported by card
firmware yet. Firmware will be released as GPL. Youtube clip of first prototype
(http://youtu.be/_W1WXnL9MeA) .
Raspy Juice Exp Board
Raspy Juice (http://2-watt-elements.myshopify.com/) by 2-Watt Elements is an
experimental board that supplies the Raspberry Pi with +5V through the GPIO header.
With its wide input voltage range (6~23V), the buck regulator can be powered by
batteries, 12V Adapters, solar, etc. Other features are the RS232 level console port,
PCF8523 RTC, and an expansion ATmega168A microcontroller as an I2C slave. This
latter MCU has interfaces of an RS485 port, an additional RS232 port, 4 RC-servo ports
and unused-pins expansion header. The MCU firmware is updateable through the I2C
interface. Hardware details are in http://code.google.com/p/raspy-juice/wiki/
HardwareDescription
pyMCU
pyMCU (http://www.pymcu.com) is a python controlled microcontroller that works with
the Raspberry Pi, connects to the USB port and uses the pyMCU python module and
pyserial to control the microcontroller in your python script. You can communicate with
i2c, spi, serial, and one wire devices, software configurable pulse in / out functions, has
13 Digital IO Pins, 6 10-bit Analog Pins, 5 10-Bit PWM Pins, blink LEDs, control servos
and motors, read various sensors, built-in functions for sound generation: arbitrary
frequency generator, misc. sound / tone generator, DTMF generator. PyBootloader -
python script for uploading new firmware versions or your own microcontroller code.
Check out some of the Tutorials (http://pymcu.com/Tutorials.html) and Examples
(http://pymcu.com/Examples.html)
RPi CC1101-OneWire-Clock extension
The RPi-COC board (http://busware.de/tiki-index.php?page=COC) from busware.de
(http://busware.de) adds Onewire, a Sub-1 GHz RF Transceiver, RTC and an EEPROM
mainly for smart home automation. The Onewire RJ11 port is driven by a DS2482 chip
supported by 5V levelshifter and strong pullup. The DS1339-RTC is powered by CR2032
battery or on-board 60mF supercap. The 2Kbit EEPROM (at24c02) is mainly to hold
board specific config data. The CC1101 Sub-1 GHz RF Transceiver is controlled by an
atmega1284 to pre-process air data. It is connected to RPis UART and contains a
avr109-bootloader for firmware updates. The popular culfw-firmware (http://culfw.de)
lets you interact with FS20, Homematic, Intertechno or similar actors and sensors - easily
using FHEM (http://fhem.de) -home automation server. In addition a secured 5V power
socket for external power supplies is provided.