I'm not expert in eletronics circuits, but I need make a device to learn the IR signal from a DVD-Record (panasonic dvd dmr-ez28) and send to PC. Then, users interact with the software and it sends the signal directly to a DVD (not over IR Led, to not lost samples).
The IR Module is like this one:
The output is HIGH if NOT detecting any infrared signal and goes LOW if infrared is detected..
Based on circuits over the internet, I made this circuit attached.
I have some troubles:
The LED on the MAX232 be always ON. When the signal is received from IR module, the LED blinks. The right is the LED stays off and flashes when receiving the signal.
Serial port don't stop receiving information, even when the IR module is not sending signal. It looks like some kind of interference.
The DVD player does not recognize the signals sent by the PC.
Remote controls don't send RS232, or anything like it, so you can't use aserial port like that - and there are huge numbers of totally different systems in use.
If you check my PIC tutorials it explains the Sony system (SIRC) and how to read and write it.
Use a fast opto coupler from the printer port to the IR. You need to send an unmodulated code, see LANCs / SIRCs (Sony) for examples. Your Panasonic will have its own protocol but the method will be the same.
From the hardware standpoint:
If it is 5 volts comming frove the dvr then the 7805 regulator won't work. If it is 12 volts it will be to high for the ir sensor.
From the hardware standpoint:
If it is 5 volts comming frove the dvr then the 7805 regulator won't work. If it is 12 volts it will be to high for the ir sensor.
You right. This diagram is old... For my test, I used a external font connect into to regulator 7805. Just the ground is common between the font and the DVD/IR Module.
The both... I need learn the all buttons of the remote control, to create a "virtual remote control" in the software. Then, the software over the circuit can inject directly the signal on the DVD...
I can't use IR Led to send the signal. This I already made and work, but some times the DVD loses one signal, and all sequence are compromised...
This recorder is of my (old) father. He used it. When him record some videos, he put the text on "chapter". But to do that, it's need, with the remote control, navegate into the letters over the screen. This is has a lot of work!
My father don't know work with software to record DVD. I alredy tried that... Then, I made a while ago another circuit to send signals through the IR Led, but allways the DVD lost some samples...