I'm looking for ideas on how to emulate a SPDT relay, i.e. when current is applied the circuit travels along path A and when current is removed the circuit travels down path b. This is for low voltage (12Vdc or less), low current (500ma or less) circuits.
One obvious (to me) solution is to use an NPN and PNP transistor, with the control current going to both bases, when on the NPN path is active, when off the PNP path is active.
What are other possible solutions and why are they better (realize this is a very subjective term) than the two transistor solution?
One obvious (to me) solution is to use an NPN and PNP transistor, with the control current going to both bases, when on the NPN path is active, when off the PNP path is active.
What are other possible solutions and why are they better (realize this is a very subjective term) than the two transistor solution?