Background: I'm attempting to reverse engineer some old lighting circuits that were built in the early 80's in the hopes of replicating them. The circuit in question uses a 5V regulator, a timer, a counter, a few ULN2003A's, and some 22 Ohm 1W 10% carbon film resistors, all to "animate" a set of small 6V lamps. I believe a 6V motorcycle battery was used to power the circuit, the lamps powered directly, and the ICs through the 5V regulator.
Question: What would be the most likely use for the resistors? I know incandescent bulbs don't require them, but from what little bit of information I've been able to find, they may decrease the speed of the filament heating up and therefore help with bulb lifespan?
Question: What would be the most likely use for the resistors? I know incandescent bulbs don't require them, but from what little bit of information I've been able to find, they may decrease the speed of the filament heating up and therefore help with bulb lifespan?