Tv remote connection to an Arduino I have a tv remote that I want to connect to an Arduino so that I can send a series of commands to the TV using the remote.  I would like to open the remote and solder transistors or a Transistor Array in place of the buttons.  I have never done this before, so what do I need to be aware of?  I think that I will need to power the remote using the Arduino's power supply, but I am a bit foggy on the details.
If you're just running lines to the buttons, you won't need to power the remote from the arduino.  You could just let it keep the internal batteries.  But it would be possible to wire it up for power as well.

As a learning project, you could just take it apart and see if you can access the button contacts.  See if the contacts are split.  If so, shorting one side to the other should count as a button press.  But the details have nothing to do with an arduino.  They would depend on your specific remote and how it's constructed.

If your purpose is really to control the TV (rather than learning about the remote and fiddling with it), it will be much easier (and probably cheaper) to blast the IR without involving the remote at all.  A single IR transmitter and a library would work in most cases.  As an example: http://www.righto.com/2009/08/multi-protocol-infrared-remote-library.html

P.S.  By coincidence, Adafruit just posted an updated guide to IR library use on Arduino.  https://learn.adafruit.com/using-an-infrared-library/overview