IR Remote codes that alternate?

I'm looking at the data output from a Thomson RCT110S remote and the code is not consistent for the same button press. Instead it seems to alternate between codes for each press of that button. i.e, press "1" and I get one code, press "1" again and I get a different code, press "1" a third time and it goes back to the first code I got. Occasionally it will give me something else entirely and then go back to alternating, crazy. It does the same thing with both an IR receiver chip and a discrete photo transistor, so it's not the receiver chip going wonky.

Another Thomson remote I have (RCT4130S) also does this.

But all my other remotes (Sony HT, no name DVD, aircon etc) all give a single consistent code for the same button, as I'd expect.

Anyone know what on earth the Thomson remote is doing?

Thanks Dave :)

Reply to
David L. Jones
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David L. Jones wrote: > Anyone know what on earth the Thomson remote is doing?

It's how the receiver differentiates between you holding the button down, and pressing it multiple times. I thought all remotes did that.

Clifford Heath.

Reply to
Clifford Heath

Some codes does have a toggle bit, this bit toggles each time your start on a new keypress.

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Can show your curves for many different remote controls.

Reply to
HKJ

Apparently not, all my other remotes send exactly the same code each time the same button is pressed. The Thomson seems to be the odd one out.

Dave :)

Reply to
David L. Jones

that.

I've seen some send the same code every time, some toggle back and forth and some have a "repeat" bit position that indicates that the button is being held down. Some controllers only transmit the code once with a single button press, some send the same code three times. There are more schemes than there are manufacturers.

Reply to
Anthony Fremont

Hi Dave,

sounds pretty normal for an RC5 based remote.

Real PITA if you try to use a 3rd party learning remote. You can turn the TV off, but not back on, unless you press a different code first.

Cheers, Ray

Reply to
Ray

Thanks guys. Looks like I'll just have to "deal with it"!

Dave :)

Reply to
David L. Jones

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