I've got a simple circuit that uses a BC337 NPN transistor to switch a DC buzzer on and off.. It's set up as a classic common emitter switch eg The Buzzer is in the collector circuit and the base is driven by a micro via a
1K resistor. The problem is the pesky thing oscillates. I didn't do the PCB layout and I suspect that the cause is some inductance in the emiter trace? Any ideas for a cure?- posted
20 years ago