How to control a TV without a remote control, from a phone?

Question

Electronics

I have a phone, but the phone does not have an IR diode like in the remote control; can you do it yourself?

Answer 1

for about $ 2 you take a 3V power supply or a pair of batteries with a holder
for $ 1 you take esp8266, which has wi-fi on board and a little brains
for a few more cents you take an IR LED, a resistor and a box
Then write the firmware for the ESP-shki so that it showed you the web interface, and when you clicked on the buttons, it blinked an LED.
Assembly guides and even ready-made firmware are easily googled .
And yes, it is much easier to buy a new remote control for about the same money. Maybe even a trainee.

Answer 2

It is possible, but quite difficult, you will need to build a non-trivial electronic circuit.

Answer 3

Plug an IR transmitter into the headphone jack + install a program that will send remote control signals.
there are quite compact models.

Answer 4

Or an IR transmitter in a minijack or in usb, for example, from a fresh one from Baseus.
Or take a BroadLink combine