Hello,
I found your site from a web search for electronics help on a model railroading project. I know very little about electronics, but would like to find out how to implement a small simple power switching circuit. I have 30 LEDs in an N scale carousel that are currently battery powered. The 30 LEDs operate on 3 volts and drain the two 1.5 volt batteries fairly quickly at shows. I have tried using external power for the LEDs, but the pickups lose contact when the carousel turns and cause the lights to flicker. I have tried using capacitors to eliminate the flicker, but while they keep the LEDs from going out completely, they cannot provide enough current to keep them from dimming and still causing a flicker effect.
Since fresh batteries can power the LEDs at 3 volts without dimming, I would like to know if there is a simple means of powering the lights with external power and only switch to the batteries for the occasional momentary power loss and then switch back to the external power without any flicker.
Any help or direction would be greatly appreciated,
John Hudson
I found your site from a web search for electronics help on a model railroading project. I know very little about electronics, but would like to find out how to implement a small simple power switching circuit. I have 30 LEDs in an N scale carousel that are currently battery powered. The 30 LEDs operate on 3 volts and drain the two 1.5 volt batteries fairly quickly at shows. I have tried using external power for the LEDs, but the pickups lose contact when the carousel turns and cause the lights to flicker. I have tried using capacitors to eliminate the flicker, but while they keep the LEDs from going out completely, they cannot provide enough current to keep them from dimming and still causing a flicker effect.
Since fresh batteries can power the LEDs at 3 volts without dimming, I would like to know if there is a simple means of powering the lights with external power and only switch to the batteries for the occasional momentary power loss and then switch back to the external power without any flicker.
Any help or direction would be greatly appreciated,
John Hudson