I'm trying to power a circuit that is composed of a string of LEDs (30 LEDs in parallel, 2.1-2.2 forward voltage, each with a 47 ohm resistor) and a 3v mini DC motor. I can either do this on two separate circuits connected by a DPST switch or on one circuit with a SPST switch. What size battery should I use for either option, and which would be the better choice?
I'd prefer the SPST just because I want to use a momentary push button switch and I already have some (I'd have to order a DPST online), but I want max brightness for the LEDs and sound/vibrations from the motor. Either way the circuit(s) will only be closed for a few seconds at a time with the momentary switch.
I'd prefer the SPST just because I want to use a momentary push button switch and I already have some (I'd have to order a DPST online), but I want max brightness for the LEDs and sound/vibrations from the motor. Either way the circuit(s) will only be closed for a few seconds at a time with the momentary switch.