The USBtinyISP is an USB AVR ISP programmer, capable of writing and reading flash, EEPROM and fuse bits of Atmel AVRs. It is based on the USBtiny project by Dick Streefland and can be used as the USBtinyISP by Adafruit, therefore it works great with avrdude und AVRStudio!
The USBtinyISP is due to the usage of the ATtiny24A as main controller extremely small and low cost, it has the form factor and size of a general USB Stick and offers a standard 6 pin ISP connector. This programmer is able to power the target board with up to 300mA @ 3.3V or 500mA @ 5V, selectable via DIP switches (see How to use for further information). If power distribution is deactivated, the target AVR will be programmed with with a voltage level equal to the voltage applied by the target board to the VCC pin of the ISP. This means, e. g. a battery powered project running at a voltage anywhere around 3.7V will be programmed with the same voltage level, this way you don't have to worry about destroying your AVR by programming it with a voltage higher than the supply voltage!
With the first DIP switch the target power distribution can be activated (ON ≙ activated, OFF ≙ deactivated), the second one selects the supply voltage (ON ≙ 5V, OFF ≙ 3.3V).The USBtinyISP runs under Windows, Linux and MacOS X, for Windows a modified LibUSB driver has to be installed. It can be used with avrdude by including the option -c usbtiny, within the Arduino IDE Tools > Programmer: "USBtinyISP" has to be selected.
Other than that the USBtinyISP just has to plugged into an USB port and connected with an standard 6 pin ISP cable to the target board!
This project is licensed under GNU GPLv3, see LICENSE.txt for further information.
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