Little Wire

Little Wire is multi-featured USB controlled open source hardware tool packed in a minimal form factor designed by ihsan Kehribar. Even though it has minimal form factor, and packed with full of features; there aren’t any SMT components involved, therefore it is very suitable for beginners to assemble. This tool has to take instructions at run-time over USB. It can't work in a computer-less environment. Note V1.1 beta firmware released for the Little Wire. You can find the changelog and details from this link. Features USB controlled multi-tool with: 4-channel digital input / output ADC (10 bit resolution) 2 parallel hardware PWM outputs SPI interface I2C interface USBtiny compatible AVR programmer Printf style debugging over AVR-ISP pins USB to UART converter (alternative firmware -- CDC-232 port) Onboard serial bootloader for firmware upgrades Minimal form factor and all through-hole components Open Source Hardware design Applications AVR programming /summon captainObvious LED dimming, color mixing General servo driving Pan and tilt servo control of a webcam for face tracking With additional motor driver IC, 2 wheel robot driving Analog voltage recording and plotting Controlling LED matrix displays by using SPI module to drive shift registers USB to SPI bridge USB to I2C bridge USB to UART bridge General purpose V-USB developement board Packing list 1 x Little Wire PCB 1 x Pre-programmed Attiny85 chip. 1 x 8pin IC socket 1 x USB Male Type A connector 2 x 3.6v zener diode 2 x 100 nF capacitor 2 x 27 Ohm resistor 1 x 1.2 kOhm resistor 1 x 150 ohm resitor 1 x LED ( for power indication) 1 x 2pin male header 1 x 2pin jumper 1 x (2x3)pin male header Pinout Silkscreen AVR-ISP PWM/Servo ADC I2C SPI CDC-232 Bootloader pin1 MISO ChannelB - - DO TX TX pin2 SCK - Channel1 SCL SCK RX pin3 RESET - Channel0* - CS - pin4 MOSI ChannelA - SDA DI - RX Analog functionality on pin3 pin isn't stable but supported. Use it at your own risk. Document Links Project homepage Github repository for firmware and libraries Dowload the entire repository Hardware files What is included? Eagle schematic / layout files. Also in PDF format. Microcontroller firmware files and makefile Bootloader source files C function/header files for command line USB interface for Windows and Linux C++ class for Windows and Linux Processing library for Windows ( With reduced feature set ... ) C# class for Windows USB interface ( in development ... ) Example C projects for almost every feature of the board Example C++ projects for almost every feature of the board Example Processing projects Example C# project for analog voltage plotting based on zedGraph Note Do not use the Adafruit USB VID/PID without written permission from Adafruit Industries, LLC and Limor "Ladyada" Fried (support@adafruit.com). Permission is granted for littlewire Ihsan Kehribar and Seeed Studio by Adafruit Industries, LLC to use the Adafruit USB VID/PID for littlewire.