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-   -   Yet Another IR Remote Volume Controller? No, I want one WITHOUT uC (http://www.diyaudio.com/forums/analog-line-level/224570-yet-another-ir-remote-volume-controller-no-i-want-one-without-uc.html)

yagoolar 29th November 2012 06:53 AM

Yet Another IR Remote Volume Controller? No, I want one WITHOUT uC
 
I want to add an IR remote volume controller to my tube amp (C3g+6C4C). There are a lot of circuits based on microcontrollers (AVRs, PICs, '51s etc.), but I have found 0 (zero) pure analog ones. Are there any special funtion IC, e.g. RC5 decoders, or discrete solution I can utilise to control an Alps RK168 series potentiometer?

rsavas 29th November 2012 06:34 PM

I think all the dedicated RC5 decoder IC's are all obsolete, so a MCU is the only modern day solution for what you want.

quadtech 30th November 2012 02:38 PM

If you don't want to go through the hassle of programming the microprocessor, there
are cheap kits on ebay.

yagoolar 30th November 2012 09:33 PM

Yes, I know about kits from different online shops. Found a couple. I know about discontinued SAA chips. Yet I thought someone had had a different approach. Anyway, thanks.

gmphadte 3rd December 2012 06:09 AM

Search for Holtec ICs.

Gajanan Phadte

balerit 3rd December 2012 06:43 AM

Quote:

Originally Posted by yagoolar (Post 3264793)
Yes, I know about kits from different online shops. Found a couple. I know about discontinued SAA chips. Yet I thought someone had had a different approach. Anyway, thanks.

I use the TA7630AP (also TDA 1524a) which are pure analog and would like to make it remote controlled but I know nothing about pics. The chip's volume, bass etc. is controlled by a 0-5v variable voltage on their pins and I was wondering if one could use a microcontroller to vary the voltage on these pins?

http://novelbooks.weebly.com/camm-eq...amplifier.html

yagoolar 3rd December 2012 09:50 AM

You can do that with any uC with digital to analog conversion. The choice depends on the number of lines you want to control.

balerit 3rd December 2012 10:59 AM

Quote:

Originally Posted by yagoolar (Post 3268240)
You can do that with any uC with digital to analog conversion. The choice depends on the number of lines you want to control.

Well, I would want it to obviously use a tv or similar remote control, maybe have a learning ability and would control 4 lines: Volume, bass, treble and balance. It must have mute, fade in fade out and have a preset switch on volume. But as I mentioned don't know the programming side of things, but must say my pre amp is a great sounding one.

gmphadte 4th December 2012 03:59 AM

All u want cannot be achieved easily without using a preset equaliser chip. U can do it with motorized pots but will be costly and getting the pot value will be difficult to replace in an existing circuit. However fade in and fade out will pose its own issues.

Gajanan Phadte

balerit 4th December 2012 04:08 AM

Quote:

Originally Posted by balerit (Post 3268084)
I use the TA7630AP (also TDA 1524a) which are pure analog and would like to make it remote controlled but I know nothing about pics. The chip's volume, bass etc. is controlled by a 0-5v variable voltage on their pins and I was wondering if one could use a microcontroller to vary the voltage on these pins?

DIY Preamplifier - The Book Worm

Sorry guys, this is the part number: TA7630P


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