Need help in transmitting TV signals thru an IR Led via mydaq

Hi,
I currently have this project that uses mydaq to receive the TV remote signals and stored in a measurement file.
I have come to the stage where i can store the demodulated signal via IR receiver in a text file. However, I have difficulty in transmitting the signal thru the IR Led that is connected to ao1. I have already multiplied the stored waveform with a 38khz carrier frequency square wave. Can anyone help me on this?

What kind of problems are you having? Do you get errors? Does the TV always switch to "I Love Lucy" reruns? What kind of amplifier/driver are you using for the LED? The myDAQ AO lines are limitied to 2 mA, which is at the low end for driving an LED.
Are you using the correct modulation scheme? The Philips RC-5 code, for example, would not be generated by multiplying a waveform by a carrier. The myDAQ anaolog output is fast enough to generate this signal, but I do not know if the timing can be set to the exact frequency required. The pulse is specified at 6.94 us.
Lynn

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VinylCouture.com
(706) 326-7911

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