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Old 8th Apr 2019, 10:26 pm   #8
rambo1152
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Join Date: May 2010
Location: Manchester, UK.
Posts: 1,279
Default Re: Another pulse to tone possibility

The item pictured at the foot of my post #2 is basically the circuit Joe ThePillenwerfer described. My contribution was to miniturise it using a sandwich of two fragments of perforated project board so it fits into the tiny eBay trinket case shown.
I'll gladly post the layout I used next week and if nothing else, following Joe's instructions will teach you a useful skill; how to programme Atmel microcontrollers
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