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Self driven piezo

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piezo red- supply
piezo black- ground
piezo blue- feedback
most of the times the feedback is connected to base of the transistor...but here it is connected to emitter...
cannot understand the configuration...
the purple lines describe the outputs coming from timer 555 to activate the transistors
Piezo Self driven.PNG
 

AnalogKid

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Hard to say without more information. I agree, the feedback connection usually is a high impedance if the circuit is self-oscillating. Can you show more of the overall circuit?

ak
 

audioguru

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A simple piezo beeper is wired like this:
 

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i would have shown the ckt..if i could have
but it wont matter...the transistors are getting activated by the 555 timer ics
I dont understand why an INDUCTOR is connected along emitter...any clue???
 

alec_t

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DerStrom8

Super Moderator
Where did you get this schematic? It's absolutely HORRID!
 

alec_t

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