[mythtv-users] IR transmitter help

[David Watkins]

> The IR emitter is connected to the receiver with a 3.5 mm jack.  I
> tried swapping the emitter with the one from my old TiVo, which has
> the same size jack, but when I do that I don't see it blinking either
> visibly or in the IR (on a digital camera display).

I'd guess there's a 50% chance that the polarity of that jack is the
other way round, even if the voltage is correct.