Hi there,

I know this is old school but cell phone with IR blaster is very useful, I use my phone to control most of my AV equipment and stuffs, unfortunately very few new phones still offer this functionality, user has to DIY if they want that, I have a thought don't know if it will work.

Most of the cell phone comes with LED flash for camera, but they are not IR, I wonder if it is possible to write an app to feed the control signal to the LED, and cover an IR filter over the LED to produce the same effect ? if works, this is more elegant than put an huge plug in IR blaster on the earphone/USB jack, and will not need to turn the phone upside down to send the beam, comment ?