Quote:
Originally Posted by ECONORAM
I tried that myself, and it didn't work...so I made a corroplast disk with holes, clamped it to my driveshaft, and wired in a 12v gauge bulb and IR sensor to read the light pulses. I'm on my third disk already, so the step up voltage sounds like a much better idea...
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Newer schematics seems to use voltage divider in atmega VSS pin. You can try to unsolder resistor between VSS input and ground pin (if you have 2 resistors in VSS pin - keep this one - between mpguino VSS input pin and atmega pin).
Edit:
if your mpguino is based on this schematic, then voltage divider is made using R3 and R6 - remove R6 (then all voltage reaches to pin 23, otherwise half of voltage)
http://opengauge.googlecode.com/svn/...no/mpguino.png
Let me know if it helps
Meelis