I have seen ops amps, gain amps, simple resistor devider networks, capacitors been used as some type of filter and the list goes on. I have very limited PCB space. I am looking for a simple way to read my BEMF from my H-Bridge and feed that into a 10Bit ADC on my PIC. The supply voltage is anywhere from 9 to 17v, and can even spike sometimes up to 27v then a zener takes over as protection.
With a supply voltage that changes how can I get some type of messurment ?
With a supply voltage that changes how can I get some type of messurment ?