Introduction: TV-B-Gone Gen4: Mod to Add a US/EU Switch

Picture of TV-B-Gone Gen4:  Mod to Add a US/EU Switch

If you have a Generation4 TV-B-Gone you can modify it by adding a switch to choose between European POWER code transmission or US POWER code transmission.  First check if your TV-B-Gone board looks like the one pictured below to see if you have a Gen4.

Note: If you have an older version, you might find the answer in this instructable of the inventor Mitch Altman who had helped me a lot, modifying the new version.

Step 1: Modify the Case

Picture of Modify the Case

You need a very small switch (some sort of smt switch) to fit in the original case. If you got one, figure out where to put it - best would be the side of the board where no other parts than the battery clip is mounted. Check the other half of the case - there is not much space and find a good position.

Step 2: Glue the Switch and Solder the Parts

Picture of Glue the Switch and Solder the Parts

If you have an european version, desolder R3 first. The left pad is connected to ground, the right side to pin 5 of the microprocessor (thanks to Mitch again for the schematics). The US-version shouldn't have R3.

Glue the switch in its position.

Solder a small cable from the right pad of R3 to the switch.

Solder a 1K (or something like this) resistor from the other pin of the switch to ground (I used the middle pin of the resonator).

Update: Mitch was nice enough to let me add the schematics for you.

Step 3: Test It

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If you put the batteries back in, the red led of the TV-B-Gone will blink 3 times if the switch is open (US-mode) and 6 times if the switch is closed (EU-mode). If you want to test it and take out the batteries, you have to wait a minute or so, to let the condensator discharge (otherwise the microprocessor won't reset, and the led won't blink).

Step 4: Case Closed

Picture of Case Closed

From now on you have a few more chances to turn these TVs off. I've found 2 LCDs near my place, that need to get the US-codes.

Little fun fact I've noticed: One of the last codes sent (in both modes) is the code to send any Apple Mac with an IR-Receiver in sleep mode, if it isn't paired to a single remote (that's standard).

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