I am trying to develop a circuit where the output of a linear Hall Effect sensor drives a non inverting op-amp whose output in turn drives a 2N3903 transistor to control the current in a voice coil.
The output of the Hall Effect sensor has a quiescent voltage of 2.64 V, which goes to .11V when the magnet is applied.
In response, the op-amp output goes from 3.8V to .33V.
Is there a way to get closer to 5V and 0V?
I have designed the transistor stage, but need help with that too. When the op-amp is working, I'll post that too.
February 08, 2017
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