Ir learning and IR distribution

[PT]

Jon

I have read in another post about the possibility of changing a resistor in the uirt to allow higher line signals.
I am currently using the uirt with a 3 zone setup. The external jack is split into two feeds with one going to an Ir distribution box the other directly linked to an ir emitter. The question is can I somehow either amplify or make the signal stronger to the ir emitter.I am using the following from Maplin.co.uk CY85G .I would like to use the ( YH70M (code number) which is a high power emitter. Cable run is approx 40 ft. Does reducing the transistor value improve the line signal?

Second question relates to ir codes
I seem to have some problelms with a philips code for a DVD player I use Housebot and I can learn the code but when i try and use it(arrow keys) it works once and then will not work again unless I have another command inbetween ie down arrow will not not work twice in succession the led blinks ok on unit.Any ideas

[jrhees]

Yes reducing the resistor value will probably improve the signal.

As far as the Philips IR codes, it sounds like it uses a toggling code. There are two ways to work around this:

1. If possible, insert a 'benign' code between each transmission.

2. If that does not work, the USB-UIRT can automatically toggle between two codes, but it will require manually editing the IR codes housebot has stored. If you can find where these codes are stored, email support@usbuirt.com for more details.

-Jon