I have attached a circuit that I am having trouble understanding. Here is what I think about the circuit so far. C1 charges through R1 and R2. Q1 is active for a short time until C1 is charged. Q1 takes Q2's base to ground activating Q2 since it is a PNP. The speaker is active during this time. I do not understand what / how discharges C1. Does Q2 discharge it when it activates, thus discharging back through R1 and R2? This circuit is out of a kit and does not give any real explanation to its operation. Any explanation or corrections to my thoughts would be greatly appreciated.
6.8 KB Views: 35