Hello,
I am a beginner to electronics and came up with this circuit on my own, so there's a good chance i've done it completely wrong. The circuit is supposed to pulse an LED to music, and it does this just fine for the first few seconds. After letting the circuit run for a short time, the LED will slowly start to dim, as if the volume of the input were decreasing. At first i thought that i was frying my LEDs, but they are just fine. Removing either the power, or the audio source and then replacing them will bring the LED back to full brightness.
Could someone explain to me why this would be, or a better way to design this circuit. (I have a very limited supply of components)
Here is the schematic of the circuit:
**broken link removed**
[This was my first time drawing a schematic, so things may be backwards. The transistor, Q1, is a 2N2222 NPN.]
Thank you in advance,
Travis