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Club buzzer for DCC short circuit testing


blind_pyro1
 

My question concerns the following page:


Under the blue title section "Testing," the diagram of a "Club
Buzzer", why is the capacitor needed in the circuit. I can see how
everything else in the circuit works but I'm not sure what is being
accomplished with the capacitor. Does the capacitor delay the buzzer
circuit from becoming active for a small length of time?

Thanks,
Andy

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