Adjust signal (monostable 555 timer)

[Yoshidk]

Hello everyone

Im building a clapswitch, and i have most of it working, but i ran into a problem
The schematic is here:
**broken link removed**

The purpose of the circuit is, when sharp noises are sound (like when you clap your hands), it will make a 230V relay open or close. Then this relay can controll ie the bedroom lights..


My problem is after the first op amp, a clap will produce several pulses, i think its because of ecco, and the counter will count all of them, so i need some way to turn these signals into one
I made a paint illustrate, the first graph is the Output from IC1, and the second is what i want for input at pin14 at IC2
**broken link removed**
My signal can drop from "high to low" as well as illustratet here with "low to high"

My first thought was a Monostable 555 timer, and i found this schematic (R=80 kohm, C=0,1 uF = 0,088 sec)
**broken link removed**

But i cant get any output on the 555 timer, what am i doing wrong?

Also, is there an easier way to solve my problem of removing the "ecco spikes"?

Thank you
Jeppe Clausen

 

[audioguru]

A clap switch circuit is stupid because it is activated by any sound like a dog barking.
Echoes also cause a clap switch to be activated. Maybe you live in an Italian washroom. Replace the ceramic tiles on your floor with carpet.

None of your attached schematics can be seen.

 

[cowboybob]

What ever you do, you'll do yourself a big favor by adding to your clap detection circuit a 555 "bounce-less switch" circuit before the relay.