Remote volume - existing remote

[pikkujöpö]

Hi

I reacently assembled a remote kit from Dantimax.
It uses the same code as some Philips televisions.So if your existing remote can control the Philips televisions as well,the changes are good.
My remotes from Sony DVD and Yamaha hometheater amp both are able to control the dantimax kit.They both have few buttons that can be programmed.

[BrianDonegan]

I get confused,

Different Brian

I just hooked up a remote controlled pot

The one he is talking about uses a remote chip from Rentron (Microchip PIC with remote decoder code preprogrammed). It gives you an output for vol up/dn, channel up/dn, and digits 0-9, plus a toggling power output. I just used the Vol Up/Dn to drive an h-bridge chip from TI the controls a motorized pot.

You could easily use it to control multiple motorized pots, for volume, balance, bass, treble, etc.

Here's a link to the board I made. It's a really simple circuit (not much design involved).

[ppcblaster]

Thank You, I may have more questions.

One step at a time.

Thanks again

[BrianDonegan]

Keeping it all very simple, you could even go with digipots for all the controls, have up/down buttons for each, and piggy back the remote outputs with them.

Maxim DS1804 pots have a simple up/down interface and they come in nice DIP-size packages. Cheaper than a motorized pot too.

EDIT: Actually, it only works on transitions, so you would need to set up an oscillator for each, still pretty simple. Not as easy as programming a PIC to do all the work, but...

[Stuey]

Hi Brian,

What's an 'H-bridge chip' if you don't mind me asking?

I've had other thoughts. I was thinking that I could use the existing Marantz CD remote (which has Volume up/down buttons for the headphone jack volume control). I figured there may be a chance that the 'system remote out' RCA socket could provide an output for volume when these buttons are pressed...or they MAY only work the volume via the volume control IC. Not sure.

But it'd be neat if I could drive a receiver in the amp via a simple RCA remote cord from the CD player system remote output.

Cheers

Stuey

[BrianDonegan]

An H-bridge is a circuit used to drive, among other things, a bidirectional motor.

Here's a link I found quickly: http://www.bobblick.com/techref/proj...e/hbridge.html

Here's the chip I used:
http://focus.ti.com/lit/ds/symlink/sn754410.pdf

It is a quad half h-bridge, enough to drive two motors.

[Stuey]

Thanks Brian.