Main question: Do logic circuits use a current source or a voltage source? My assumption is that they use current sources because the standard is to use voltage as the indicator of input and output values (usually 0V and 5V).
EDIT: There appears to be some confusion about my understanding. So here are my assumptions:
I am assuming Ohm's law
V = IR, meaning that with a constant current (current source), resistance controls voltage, but with a constant voltage (voltage source), resistance controls current.
I am assuming that (approx) 5V output/input means the bit is a 1 and (approx) 0V output/input means the bit is a 0.
Circuits change the voltage, by 1) using resistors to control the voltage range of the power, inputs, and output directions, and 2) using voltage controlled transistors to control the actual logic.
If a current source, then would it be safe to assume that using a battery or a 5V/10A power supply (usually voltage sources by my understanding) would be a bad idea with standard logic circuits?
And what would the amperage of a good current source be for a logic circuit?