16F628A ired with battery

[Michael]

Looks like your building a winamp interface...."Keywiz"?...I'll have to look into that....sounds interesting.

So, if your getting noise on the infrared receiver output, it really never goes through the timeout?

I think what I may need to add in my code is "IF DAT = 0" then GOTO START and keep it in that loop.

DAT= 0

START:
SERIN BLAH BLAH [QUALA,QUALB],DAT

IF DAT = 0 THEN START


I know the 16F628a will operate on 3v minimum but I imagine 4 aaa cells would be safer.....wish there was a button cell that was readily available, inexpensive and do the job....that would be nice.

[penelopepug]

Hi again. I forgot that you are using IR not RF. So I assume you are genereating a 38khz carrier. I'm not actually sure if IR receivers are sussceptible to IR noise because the requirement for a 38khz carrier should elliminate most noise issues if not all, I would guess. I would just put a logic probe on your serin pin or scope it. Sorry for the RF information. Here is a link to an Energizer (cylindrical) battery performance information, if you plan to use alkalines. http://data.energizer.com/PDFs/alkaline_appman.pdf. There's a lot more out there for other battery types if you search for "battery discharge curves" for example.

I found that my 16F876 operated down to about 2.4 volts with the brownout detect disabled. As such I am running my transmitter on 2 AAs. Of course there is low voltage versions of most PICs including the 16F628A as I recall.