[mythtv-users] IR Blaster not always changing channel

[Christopher Kerr]

On Thu, Dec 16, 2010 at 2:57 PM, Brian Wood <beww at beww.org> wrote:
> On Wednesday, December 15, 2010 08:44:02 pm Chris Tepe wrote:
>> On mine I have the emitter taped to the IR extender that came with
>> the STB and taped over the ir port on the box itself.  since the
>> emitter box has an 1/8 jack for the emitter and the STB has an 1/8
>> jack for the extender.  Is it possible to just hard wire the two
>> together and eliminate the ir sender and receiver ends?
>> Chris
>
> Sounds like something I'd try, but I fry a lot of gear.
>
> But you really want to know what the voltage levels are, perhaps take a
> peek with a scope. It might work, or you might have to design a little
> one transistor buffer amp, maybe an emitter follower, to match things up.
>
> Or perhaps an OpAmp would work, something like a 741.

I'd think an optoisolator (which is nothing more than a little LED and
reciever in a sealed box anyway) would be appropriate.

- Chris