Create a negative voltage

Development Boards Arduino
11

dmnchief001:
The op-amp got really hot.

Hi chief,

there’s no way that op-amp can get hot unless some connections are wrong. Can you take a picture of the setup?

Also, as viskr suggested, start without the op-amp, to already get some variation in readings through the arduino code.

E

PS Rs should be much higher than 1K, more like 50-100K