Cable remote...

[Dxvideo]

Finally I fixed my 2xLM1876 sub+sat system's 100Hz noise problem. It costs me a new PCB... Now I want to design a cable remote control to him! I will use TDA1074 dc controlled tandem pot IC for this. But I want to add a power button on that remote control unit. And it will control the mains. Is there any way to control mains by "triac+diac" before the transformer? And if I connect the diacs pin to my power button on RC, does it dangerous?

(These all clear?)

Thanks for your responses...

[tecnofossil]

Greetings,
since you will have a DC supply going to your remote unit, why not simply use a switch to supply DC to a power relay located by your power supply. You would need to have a "always on" DC supply for the remote.

I bought a 12 channel IR remote control in kit form for 39 dollars (USD). It came with a fully assembled hand held remote. I'm using a Alps motorized pot in a "shunt" configuration for volume. (balance I set trimmers on the preamp itself since readjust is pretty infrequent) It is driven by one of the output sets. I also am using 4 of the outputs for controling relays that are mounted by the audio input jacks.

Check it out here: http://www.electronickits.com/kit/co...lec/ck1615.htm

Good luck....

Tom

[Dxvideo]

Well, its a good solution. But we need an extra 12v PSU for it! And it will need another AC switch. Then we will need another RC'd relay, and and and... Thats an infinite loop! (Do the relays run toggle or not?)

And the motorised pot is another good idea! But I tried TDA1074. And it gives really good results. First of all; its an (quad) auido attenuator and it works better than a pot. Second is; no mechanical noise problem. I prefer National's digitally controlled qpot IC's (plus a mcu of course) for a IR remote controlled circuit. But that all will be very complex solutions..

My solution is just a TDA1074 + dc line to a remote pot (with a little control current) and a power switch line! So the problem is in this point. I cannot draw high currents to a remote switch; first, in this case it needs thick cables (seems bad), second, I guess it will be dangerous! Because in the remote box the mains switch and dc pot will be together. Is it?

Thanks for your advice.. Sincerely.