This year I found a fair amount of IR LED's in my X-mas stocking and am keen to start work on a very basic IR proximity sensor.
I've read that a reverse polarity LED can be used as a crude receiver, but gives rather poor feedback (current/voltage wise) and as such, to use one, you'd need to include an Op-Amp into the circuit to boost it to a usable level.
I have more than enough IR LED's, but no receivers.
I have some LM324N Op-Amp's to assist with the amplification.
What I'm wanting to know is:
Is it worth waiting/buying/harvesting proper receivers for the job
Would it be efficient to try and do this with the reversed IR LED & LM324N [as I already have these on hand]
It's my 1st attempt at making such a sensor, so was wanting some feedback/opinions before proceeding.
Thanks in advance,
P.S: Sorry if this is long winded :-/