Hi, I am working on a project where I am using a LCD voltage display to measure voltage at 2 points in the circuit. The first is the voltage of the batteries providing the power, and the second is to measure the output of the circuit. It is in a very small box and I don't have room for a complex circuit. Basically I want to have 2 momentary switches- one will activate the circuit and the voltmeter and display the output of the circuit. The other switch would simply activate the voltmeter and display the voltage of the batteries(they are lithium and I don't want to over-discharge them). I thought about using a diode to isolate them but I need a way around the voltage drop that it will create. Thanks in advance for any help, and let me know if I need to clarify anything.