Can any one help with a circuit for a PIEZOELECTRIC TRANSDUCER DRIVER CIRCUIT WITH ADJUSTABLE OUTPUT LEVEL
Thank you Roger.
Sorry I only uploaded part of my request.
I need to amplifier a clock ticking so that it sounds much louder. the circuit needs to be battery powered. I have made a purchased kit retailed as a (spy bug) using an LM386n-3 IC and a electret microphone as the pickup, the circuit works ok. At maximum volume the sound from the speaker is very low; the power supple is 3x 1.5v batteries. My main supplier is Maplin **broken link removed**
Thank you all Roger