I am interested in adapting this Jameco kit schematic to my own needs. I have run into an issue though. I am not sure how to lower the voltage requirements. This circuit is built for 12V, I would like to power it with between 3.3 and 5 volts, specifically from a lithium-ion battery.
My question is specifically about the various op-amps used in the circuit.
The MC33204P Datasheet says that the minimum supply voltage is 1.8V (+/- 0.9V) and the maximum is 12V(+/- 6V). I realize that this means that I can use a 3.3V supply, but how much do I have to change in terms of the resistors and capacitors, if anything at all?
The MC34072P Datasheet does not mention a minimum supply voltage as far as I can see, although I may be mistaken. One of the graphs showing supply current vs supply voltage, starts at 1V. Will this op-amp work as intended with the resistors of the original schematic? Will is work at all? Should it be replaced?
I do not plan on following the schematic past the transistors.