I've been working on a circuit that would take a field digital input ranging from 3-30 to feed the input of an arduino. I'd also like an LED to go on when the field voltage is above 3 volts without taking up and arduino output.
The field input can either be sinking or sourcing so I needed to use a bi-directional op-amp to make this work. Here is the circuit so far. I'm definitely no expert so I could use a little help to design this one.
The field input can either be sinking or sourcing so I needed to use a bi-directional op-amp to make this work. Here is the circuit so far. I'm definitely no expert so I could use a little help to design this one.
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