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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Remote control modulator & demodulator
Hi Good Pals,
I'm designing an infrared remote controlled circuit with at least 6 functions. I need ICs that can transmit(thru LED)codes or modulate signals(from the keypad) and a corresponding ic that will decode or demodulate the signalsa to activate the loads. A matching circuit for the IC or circuit of any kind similar to mine will be welcome. Thanks |
#2
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Remote control modulator & demodulator
wrote in message ... Hi Good Pals, I'm designing an infrared remote controlled circuit with at least 6 functions. I need ICs that can transmit(thru LED)codes or modulate signals(from the keypad) and a corresponding ic that will decode or demodulate the signalsa to activate the loads. A matching circuit for the IC or circuit of any kind similar to mine will be welcome. Thanks Any old IC producing RC5 or whatever code will do at your sending end. I would think that the easiest thing to do would be to break down an old remote control handset, and cull all the necessary parts to make your custom sender. I'm not sure if there are any dedicated decoder ICs still available these days though. As far as I know, just about every piece of equipment that uses remote control, carries out the decoding as a background task of the system control processor. It would, however, be a trivial job to program a PIC to do the job, and I am sure that ready written code modules for just about any commonly used data format, would be readily available for free download on the 'net. Arfa |
#3
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Remote control modulator & demodulator
Arfa Daily wrote:
wrote in message ... Hi Good Pals, I'm designing an infrared remote controlled circuit with at least 6 functions. I need ICs that can transmit(thru LED)codes or modulate signals(from the keypad) and a corresponding ic that will decode or demodulate the signalsa to activate the loads. A matching circuit for the IC or circuit of any kind similar to mine will be welcome. Thanks Any old IC producing RC5 or whatever code will do at your sending end. I would think that the easiest thing to do would be to break down an old remote control handset, and cull all the necessary parts to make your custom sender. I'm not sure if there are any dedicated decoder ICs still available these days though. As far as I know, just about every piece of equipment that uses remote control, carries out the decoding as a background task of the system control processor. It would, however, be a trivial job to program a PIC to do the job, and I am sure that ready written code modules for just about any commonly used data format, would be readily available for free download on the 'net. Arfa Radio Shack (yeah, this was long ago) used to sell matched modules for this, but I don't have any and am not sure what was inside the modules. It must have been something pretty cheap and off the shelf though. |
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