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The USB to Serial project is a break-out board for the CP2103 from Silicon Labs.For projects where adapters are not convenient you can use the CP2103. With this break-out board, you have pins for all of the RS232 signals, four GPIO pins and 5 volts, 3.3 volts and ground.[read]

RemoteSensor is a more advanced example for using Objective Development’s firmware-only USB driver for Atmel’s AVR microcontrollers (AVR-USB).It is a more advanced example because it utilizes an interrupt endpoint to indicate to the host when new data arrived, demonstrating how AVR-USB handles a second endpoint. The receiver part is basically a serial to USB converter with special processing for the wireless protocol such as data integrity checks and data block buffering.The system consists of the wireless sensors based on the low cost ATTINY26 microcontroller, the receiver running avr-usb on an ATMEGA8[read]

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]

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]