Flashing LED problem? Answered
Hi everyone. I mess around with HO scale slot cars and have had decent success lighting them with LEDs using track voltage and simple resistors to power them. I have ventured into the use of full wave rectifiers to smooth out the power and a small capacitor to eliminate the flicker. The problem I am having is when trying to use multiple blinking LEDs. Single blinking LEDs haven't caused any problems and I've had good results with them. The problem starts when I use more than one. I can get a pair of them to work on the bench with out any problem at all, but when they are soldered to the slot car chassis they might work for 3-5 minutes and then they stop blinking, and usually get hung up on one LED staying lit. What is even stranger is if I take a piece of brass rod and touch the anode of the dead LED, it will light up momentarily (and the other will go out). I only have so much room to work with so flashing circuits, large capacitors and voltage regulators are out of the question. Keep in mind, these cars are the size of a hot wheels or matchbox car, and the chassis uses up most of the internal space. Any help would be greatly appreciated!!!