Hi, I'm trying to figure out how to trigger a 555 timer using sound, sort of.
Basically I have a small speaker and want it to charge a cap by lightly tapping it. When the cap discharges, it triggers the timer. By changing the value of the cap I should be able to change the time it takes to charge the cap. So I can set the how long you have to tap the speaker before the timer fires.
Sure could use some ideas....please
Thanks
George
Basically I have a small speaker and want it to charge a cap by lightly tapping it. When the cap discharges, it triggers the timer. By changing the value of the cap I should be able to change the time it takes to charge the cap. So I can set the how long you have to tap the speaker before the timer fires.
Sure could use some ideas....please
Thanks
George