This is fairly confusing to me. I have a bunch of transistors connected to LEDs, but they don’t work unless i touch the leads, specifically the base.
The transistors function normally, in that they respond to the signal, when they are touched. The current is less than it should be under normal operation, but on is on and off is off.
I know contact will definitely cause a change in capacitance. Am I missing some capacitors in my circuit? I’ve never heard of capacitors being required to make a transistor work, so that seems unlikely.
I am using a TLC5940 to PWM each transistor base, and the chip is working fine. I decided that I could eliminate the base resistors by using the constant current function of the chip. I do have resistors on the LEDs themselves.