USB-LED-Fader
USB-LED-Fader can control up to 8 LEDs with individual brightness waveforms. Its command line tool can easily be integrated into scripts to implement a status display for computer load, mailbox status, network load, video recording software or similar background tasks.This project use ATtiny2313.ย�[read]
STK500 Compatible AVR Programmer
AVR-Doper is an STK500 compatible In-System Programmer (ISP) and High Voltage Serial Programmmer (HVSP). It comes with a built-in USB to Serial adaptor to connect directly to USB.Here are some features:HVSP allows using RESET pin for I/O, which is especially beneficial on 8 and 14 pin devices. Simple hardware which can be built on a single sided PCB. No special USB chips are needed. Compatible to Atmel’s STK500 with built-in USB to Serial converter.Adjustable ISP clock allows flashing of devices clocked at very low rate, e.g. 32 kHz.ISP clock can be lowered with a jumper (if the programmer software does not support setting the ISP clock). Second USB to Serial converter for processing debug output from the target.HVSP connector compatible to HVProg, another STK500 compatible programmer . Open Source (including firmware and schematics). Uses USB power supply, no external supply required.[read]
AVR - CDC
AVR-CDC is an USB-RS232C interface using CDC (Communication Device Class) protocol on USB 1.1. Although CDC is a part of USB 2.0 standard, it works on low speed USB with slower speed. ATtiny45 can handle the 4800bps 8N1 well enough.No dedicated driver necessary. CDC loads Windows built-in usbser.sys.It is very low cost ith ATtiny45, this is the cheapest solution for the USB-RS232C interface.[read]