Hi everyone
Guys project which is assigned to me is to operate led with my voice
I have came across a couple of circuits i tried to implement them on proteus IsIS but was unable to provide audio signal in order to get my output
if anyone of u guys have any idea about this please help me out currently i am in 3 semester and it is really giving me a tough time

 

Hi everyone
Guys project which is assigned to me is to operate led with my voice
I have came across a couple of circuits i tried to implement them on proteus IsIS but was unable to provide audio signal in order to get my output
if anyone of u guys have any idea about this please help me out currently i am in 3 semester and it is really giving me a tough time

You can simulate audio input from a mic by using an AC voltage source that puts out a few millivolts. You'll need an amplifier to amplify the signal to a few volts which can then be seen on the LED.

I am assuming you want the LED to flash/change brightness depending on your voice. Or do you want it to turn on when you say "ON", or something like that instead?

 

thanks DerStrom8
i actually want to turn ON the led when i speak
currently i am working on following circuit

this circuit will be activated when it gets an audio signal and it will remain ON till it gets the audio signal
and i was thinking to use led's instead of relay

 

I see. I would say you'll need a flip-flop, and probably a 555 timer to put in the delay, so that it doesn't re-trigger immediately. You can still use an AC voltage source to provide a simulated audio input. I would feed it into an amplifier (as suggested before) to bring up the signal amplitude, and feed it into a 555 timer wired for one-shot operation. This will give a small delay so that you have time to finish your "on" command before it re-triggers. The output of the 555 could feed into the flip-flop, so each output pulse from the 555 would activate it (either turn it on or off). The flip-flop would then drive the LED.

That's just how I'd do it, though I would understand if you'd rather use discrete components. However it will require a bit more work and more complex wiring. Using a 555 timer and a flip-flop (and an op-amp for the amplifier) would make things a lot simpler, i think.

 

Google "clapper" Last time I looked, there were lots of schematics for this. Pick the one that looks most promising.

 

You can try this;

 

You can try this;

Hi Andy--

Is that latched though? I don't see how it would turn on with one sound and turn off with the next....?

 

Hi Andy--

Is that latched though? I don't see how it would turn on with one sound and turn off with the next....?

Opps sorry not latched but it does pre amp a mic.

 

OK look here;
http://www.eeweb.com/blog/extreme_circuits/clap-sensitive-on-off-relay

 

Heres a simple one ........

 

Heres a simple one ........

That will not run off a mic or latch.
The OP is looking for something more like a clapper, only for an LED.