Universal IR Sender

[kalpakchiev]

Current version of PBP file is for SONY codes, but can be modified to match other brands, PWM is set to 38KHz.

Tested

Best regrds

[metal]

Are you implementing this as you showed us here? If so then this is problematic.

[kalpakchiev]

Are you implementing this as you showed us here? If so then this is problematic.

It is part of another project where I use it. PIC receives RS232 commands and sends corresponding IR codes. Which part is problematic hardware, software or both?

[metal]

I should have asked you if you supply the transmitter by batteries? If yes, then your hardware and software should be changed, otherwise, ur good to go without any changes. I think you have to put the PIC into sleep and wake it up when a button is changed, this would save power, because you are running the PWM all the time, and in general PIC is running normal all the time, this will kill the batteries soon.

[kalpakchiev]

No it is not battery powered because the purpose of the device was not to substitute a remote control, but to send automatically previously defined IR commands or combination (sequence) of IR commands when something happen.   You are right - if the power comes from a battery then definitely must be taken cares about minimizing of power consumption.
At least for example in main program PWM must be turned off and at beginning of SEND subroutine to turn it on and when sending is finished to turn it off again.

[metal]

Some diodes and an interrupt will do the job