This submini USB meridian is based on a Atmel Tiny45 cpu and salary less than 5€ with a homemade pcb. It has 2 analog inputs and can supply 5V ont the 4 pins header on the rectify. One of the inputs can be scaled down with the trim pot. The firmware in the Tiny45 is written in C and compiled with Winavr and usb root charter from obdev.
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