Hi,
Im pretty new to electronics and im just interested in a pretty basic daily use of Infrared.

I know that we transmit IR signals from our remote control to a TV or a tuner box and that they receive it and use the signals with binary code and decodes it so the device knows how to react.

But can a TV or a tuner box transmit IR Signals as well? Or is it only 1 way?
for example can a certain device receive a signal from the tv that is sending it's current channel or volume?


Thanks

 

Some (very few) TVs have an IR transmitter, as well as a receiver, so that the TV can send a response back to the remote, or to other devices.

The majority of TVs only have an IR receiver, so cannot transmit under any circumstance.

I know of no tuner box that transmits, but I bet there are some out there that are capable.

 

In my experience working with televisions, I have NEVER seen a TV with an IR Transmitter, and the only remotes I have seen that have IR receivers are the ones you can "train" with another remote, such as the ones they used to use to control VCR's for recording, etc.