Post by thread:[PIC]: IR learning Part Two

Hello. Thanks for the replies that I did get, but I have not quite found what I'm looking for. I am hopeful that there might be further information out there. I am designing a device that can learn remote controls in the field, optimally without a PC. I am interested in an IR learner that would analyze and encode IR signals, and make those results available to a microcontroller so that we could reproduce the code. Has anyone seen such a component or device, or worked towards that end? Reproducing the signal is no problem once we have the carrier frequency and the code structure. We have a working device which does just that, but we have to specify the IR information for the device on a remote-by-remote basis. The last time this topic came up several months ago, several people expressed interest in such a device but nothing seemed to come out of it. Anyone out there still interested? Barnaby Thieme Product Engineer, SP Controls, Inc. spam_OUTbthiemeTakeThisOuTspcontrols.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

> I am designing a device that can learn remote controls in the field, > optimally without a PC. I am interested in an IR learner that would > analyze and encode IR signals, and make those results available to a > microcontroller so that we could reproduce the code. Has anyone seen > such a component or device, or worked towards that end? I designed something like this for a client a few years back. Can't help with code or too much information but I don't recall it being too difficult. I used a 16F84 and used the fact that the remote sent the data several times. First determine the carrier frequency (there were only a couple of values) and save that information. Then determine the minimum useful bit time and then sample at that rate to create a bitstream which is stored. No effort was made to decode it as the remote just had to regurgitate the bitstream. IIRC, there was one system that toggled a bit with each send and one (Sky TV) that used a baseband method. I think all the consumer ones we tried worked. It's not an 'off the shelf' solution but knowing that it is possible and the general method is a big step forward. Steve. ====================================================== Steve Baldwin Electronic Product Design TLA Microsystems Ltd Microcontroller Specialists PO Box 15-680, New Lynn http://www.tla.co.nz Auckland, New Zealand ph +64 9 820-2221 email: .....stevebKILLspam@spam@tla.co.nz fax +64 9 820-1929 ====================================================== -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

I have a program for my Palm Pilot that will turn it into a remote control for my TV, VCR, etc. Would something like that work for you? Barnaby Thieme wrote: {Quote hidden}> Hello. > > Thanks for the replies that I did get, but I have not quite found what I'm > looking for. I am hopeful that there might be further information out > there. > > I am designing a device that can learn remote controls in the field, > optimally without a PC. I am interested in an IR learner that would analyze > and encode IR signals, and make those results available to a microcontroller > so that we could reproduce the code. Has anyone seen such a component or > device, or worked towards that end? > > Reproducing the signal is no problem once we have the carrier frequency and > the code structure. We have a working device which does just that, but we > have to specify the IR information for the device on a remote-by-remote > basis. > > The last time this topic came up several months ago, several people > expressed interest in such a device but nothing seemed to come out of it. > Anyone out there still interested? > > Barnaby Thieme > Product Engineer, SP Controls, Inc. > bthiemeKILLspamspcontrols.com > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Barnaby Thieme wrote: > > Hello. > > Thanks for the replies that I did get, but I have not quite found what I'm > looking for. I am hopeful that there might be further information out > there. > > I am designing a device that can learn remote controls in the field, > optimally without a PC. I am interested in an IR learner that would analyze > and encode IR signals, and make those results available to a microcontroller > so that we could reproduce the code. Has anyone seen such a component or > device, or worked towards that end? Hi Barnaby, yes we have been selling them for years. Most of the appliance shops sell "learning remotes" although the pre-programmed ones seem to be getting more common. Our catalogue shows Dai-1chi and Remotec still make them, from about $23 to $38 US trade price. -Roman -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

part 1 152 bytes content-type:text/plain; (decoded 7bit) If you need to capture / reproduce just one signal, here's a pretty neat design found on the net that does the job. part 2 10297 bytes content-type:application/x-zip-compressed; (decode) part 3 136 bytes -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email .....listservKILLspam.....mitvma.mit.edu with SET PICList DIGEST in the body