Why my IR repeater works only with some devices?

[joe_ng_sg]

IR repeater

Dear guys,

I am doing IR repeater for my own hobby.

Receiving module is from Vishay TSOP7xxx that could detect well beams out from remote control.

I am using 555 IC to regenerate 40KHz exactly to modulate the signal out from TSOP7xxx. This signal is amplified and feed a IR TX LED via a about 10 meters of cable.

My question is: this could work with some device (like Toshiba TV) but not with some (like Panasonic TV)

Any one knows why? Is it due to frequecy?

Pls help!

Thks

 

[Analyzer]

Hi

It is related with signal coding system.I think Panasonic TV uses different system to en/dec signals.Check this :

**broken link removed**

Analyzer