Infra-Red Extender - Problems

[elMickotanko]

Hello, Im in dire need of some help.
Im starting out in electronics, Im fine with the theory which I learn at college but theres not nearly enough practical work. Ive tried various projects on my own which never seem to work. Its very frustrating. One such project is this **broken link removed**, a pic of the circuit is attached.
I built this on veroboard with the IR emitter on a seperate small bit of veroboard, connected by wire. I also used the daylight filtered version of the Photodiode.
When I operate a remote control pointing at it, LED1 (indicator) flashes like its supposed to, but LED0 (when pointed at the television) doesnt pass on the signal.

Im thinking: LED1 filckering suggests that the circuit is operating correctly but the infra-red pulse code is being distorted?
Ive tried the CD player and the Cable TV box also

Can any1 suggest how i could fix it? I can get most common parts from college. Or even modify it to do something else hobby-like (you know, something i can impress people with)? as this is the closest ive got to getting a circuit to work Im determined to get it working.
Any help would be greatly appreciated

 

[pike]

I think the 2.2k resistor behind the IR led is too high. You can use a lower value for this resistor as the IR led is only turned on for a short amount of time.

If the red LED flashes that means that you are getting a signal, but like you said it might be distorted. You could try using different IC for the amplification.

 

[carlosthejackle2001]

Look into the HOLTEK chips HT12D and HT12E, you will easilly be able to create an infra-red transmitter and receiver... Check out their data sheets they come with recommended circuits to build.

Need any other help you can email me at rampant_tup@yahoo.co.uk

I am using these chips for my infra-red project at college and they have made things very simple

Carl

 

[elMickotanko]

Those chips are a bit over my head at the minute. But i'll try a lower resistor and a different chip. My construction skills are very poor also, maybe this has something to do with it?
Thanks for your help.

 

[pike]

don't go past 50 ohms for the resistor below IR1

I found it so hard to determine if an IR led was burntout or not (you can't see infrared)