opAmps are said to need +Vcc -Vcc. for the prototype on breadboard i use Arduino as a power supply. and it has no -V voltage. so this is the schematics of opAmp i use: http://img812.imageshack.us/img812/9043/sample2t.jpg . It has no -V as well. also the manufacturers sign -Vcc as ground like: http…

Negative voltage in Arduino

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