This project is a tiny low-cost I2C bus adapter. It is meant to replace bit-banging adapters for the parallel port. Advantages are built-in power supply, less CPU load and a very low number of components. The image shows an example application with a DS1621 temperature sensor. The hardware of the i2c-tiny-usb interface consists of the Atmel AVR ATtiny45 CPU, a cheap and easy to obtain microcontroller with 4 KBytes flash (of which ~2k are used in this application) and 256 Bytes RAM. The processor is surrounded by few other parts.
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