IR Clap light switch

Recoil12

I'm trying to use a sound to light board to activate my room light switch.The switch can be controlled through infrared once transmitted at a consistent frequency,so far I am unable to attain this consistency.I have ported the route of one LED(purple/grey wire in picture) from the board and am running it through a 555 timer frequency circuit on the breadboard and then transmitting through an infra-red LED.The sound to light board is being powered by a 9V battery and the frequency circuit at 6V(4xAAA).
In theory when I clap or make certain sound the light should turn on/off every time.

Any ideas on where I'm going wrong would be helpful.






Sound to light Circuitry:http://www.maplin.co.uk/sound-to-light-led-22545

Chet T16

Is it working at all? i.e. ever?

The sound to like circuit is working?

The IR LED comes on at all? (check with a camera)

Is there datasheet or something for the lightswitch?

Chet T16

Whats the 16 pin DIP chip too?

Recoil12

It does work,but only 1/10 claps would work.The 16 pin photocoupler is to tie the circuits together.

Chet T16

But the red LED's work every time?

What frequency does the switch need?

Recoil12

The red LEDs work every time.The switch needs "any button on a standard remote control" according to instructions,so whatever that frequency is.

Chet T16

38khz for most remotes. What's the 555 set for? What's the value of the caps/resistors

Recoil12

3x 1K5 resistors.2 in series 821K .Capacitors are 0.01uf.

Chet T16

What is where with respect to your second attachment in the first post?

Recoil12

Forgive my paint skills,but hopefully this might explain slightly better.

Chet T16

I still can't see where they're connected

Can you fill the values in on this?
https://us.v-cdn.net/6034073/uploads/attachments/531010/238005.JPG

Recoil12

This is the guide I followed:
http://www.mycircuits9.com/2012/06/infrared-transmitter-using-555.html

Chet T16

You're really not helping me to help you!

ZENER

Using just the 555 circuit and the IR LED does the light switch work ? Leave out the Sound to Light circuit and just apply power to the 555 circuit ? Struggling to see any connection between the OPTO and the 555 circuit, how does it trigger the 555 ?

Also the location of the IR LED would make it difficult for the IR Light Switch to pick it up unless it were to reflect of something.

Ken

Chet T16

ZENER wrote: »

Struggling to see any connection between the OPTO and the 555 circuit, how does it trigger the 555 ?

It looks to me like the output from the LED is connected to pins 14 & 16, triggering the output to the positive rail (jumper from pin 1) which comes in via the yellow wire with the red end.

ZENER

Ah, see it now. So he's supplying the 555 via the opto ? Given the trigger sound is a clap - a very short duration - then maybe the 555 isn't getting up to frequency before the supply is cut to it again? The other problem I can see is which type of output the OPTO uses. If the LEDs on the Sound to Light board don't get to full brightness during the trigger sound then how hard does the output of the OPTO switch on ?

Maybe switching the the 555s output through the opto would work better leaving it running and then just connecting the IR LED during periods of the trigger sound. Just a thought.

Ken

Chet T16

If you had another 555 you could set up a monostable circuit that would run for a second or two and run the second 555 off this.

OP, i don't get why you have the optocoupler in there, you don't need it and as said its just adding another unknown.