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25th October 2006, 07:45 PM
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 electric buzzer hello i've attached the circuit diagram for an electric buzzer which i am supposed to make. i need to write a description on the working of the buzzer. but i dont understand it.  could u tell me in detail how it works? please | |
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25th October 2006, 08:00 PM
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 It's an extremely old (40+ years?), extremely crude, blocking oscillator - the transformer is used to give phase inversion for the positive feedback. The horrible way the circuit is drawn also confuses the issue!. | |
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25th October 2006, 08:31 PM
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| I still have a few very old AC127 germanium transistors and some BY127 rectifiers (green ones?). The rectifier is rated for only 1250V! 
__________________ Uncle $crooge | |
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