DC buzzer/noisemaker that doesn’t use a transistor? Answered
I’ve got some nice homemade field phones I made out of old carbon microphone handsets. I’ve currently got DC piezo buzzers for ringers (which have transistors in them).
I want to them to be able to survive an EMP, so I don’t want to use transistors.
Is there anything I can use for a DC buzzer/noisemaker that doesn’t need AC power, or a transistor?
The voltage of the phones is 1.5v - 3v dc