0

Can Someone To Capture A Few Codes For Me Please...
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

by oPossum on Sun Dec 23, 2007 7:09 pm

DIY IR capture that measures pulse time and carrier frequency.

Most DIY and many commercial solutions can not measure carrier frequency and often suffer from poor resolution and jitter.
oPossum
 
Posts: 636
Joined: Fri Oct 26, 2007 12:42 am
Location: Michigan, USA

by maltman23 on Sun Dec 23, 2007 10:41 pm

Thanks for the IR Widget info. That looks really nice! I'm going to have to try building one.

Mitch.

maltman23
 
Posts: 134
Joined: Fri Jul 13, 2007 4:54 pm
Location: San Francisco

by nutt318 on Tue Feb 12, 2008 3:25 pm

oPossum wrote:DIY IR capture that measures pulse time and carrier frequency.

Most DIY and many commercial solutions can not measure carrier frequency and often suffer from poor resolution and jitter.




Is there a parts list for this project? I download the zip file and it had 4 schematics, I am confused on which one to use. Thanks.
nutt318
 
Posts: 65
Joined: Fri Jan 25, 2008 5:43 pm

by caitsith2 on Tue Feb 12, 2008 6:10 pm

There may be 4 schematics, but there is only one with a matching board file. Use that one.

Your part list for this would be: (note, for this project, I ordered all the parts other than the demodulator through digikey, so I will be referencing those part numbers.)


Code: Select all | TOGGLE FULL SIZE
Part                    x Quantity      - Digikey part number
QSE157                  x 1             - QSE157
1N4148 Diode            x 2             - 1N4148DICT-ND
1N5231 Zener Diode      x 1             - 1N5231BDICT-ND
10K resistor            x 1             - 10KQBK-ND (min quantity 5 from digikey)
2.2uF ceramic cap       x 1             - 399-4403-ND
Serial port connector   x 1             - 3209FE-ND
8 Pin DIP socket        x 1             - A24807-ND
PIC 12F629 or 12F675    x 1             - PIC12F675-I/P-ND


If you plan on having this PCB made, to run into the same pitfall I did. I didn't expect the holes for the QSE157 to be too small. Also, I couldn't find IR demodulators on digikey, which is why I don't have a part number to list. You can get them from mouser, or if your lucky like I was, anything remote controlled, that is dead, is likely to have one you can salvage.
caitsith2
 
Posts: 217
Joined: Thu Jan 18, 2007 11:21 pm

by nutt318 on Tue Feb 12, 2008 6:17 pm

Thanks for the info caitsith2. I may play around with a breadboard first and see if I can get it working one of these days.
nutt318
 
Posts: 65
Joined: Fri Jan 25, 2008 5:43 pm

Please be positive and constructive with your questions and comments.