Thanks everybody,
I was unsure about the circuit that's why i thought it better to ask, lucky i did, thanks.
Ok, i have an AC sinewave output of around 200Mv peak to peak that decreases when an object nears the sensor & can go to 0v with large or close objects. I can adjust this to around 500Mv output but not with the Piezo tones.
How can i drive a small 8 ohm speaker with a pleasant threshold tone that dips when an object is near the sensor.
Is there a certain type of circuit that i can look up or any suggestions.
The sensor circuit is very sensitive & works nicely & i would like to finish it but i am having trouble with trying to get a good fast responding pleasant tone & one that doesn't die out to no sound with the voltage decrease.
The Piezo is to high pitched, is there a way to make the piezo have a more pleasant tone maybe, besides hitting it with a hammer
The circuit power supply is 12v, Frequency of the sinewave is 1kHz.
Any suggestions would be very helpful.
Thanks