Wanted : design PCB for relay controlled volume

ElectroNick · 18th January 2003, 07:00 PM

I'm looking for a PCB design for a relay controlled volume potmeter.
Anyone made such a PCB ? I'm trying to build a system like shown in the Pass Aleph P manual.
It looks that relay control has less problems/costs than a analog pot (unless u use a stepped switch)

So if anyone made such thing or has ideas of usefull links....please !

Gr,
Nick

jleaman · 18th January 2003, 07:13 PM

yeah id like to get one too.

xsnailx · 18th January 2003, 08:12 PM

i would be intersted too

macka · 18th January 2003, 10:45 PM

Guys,

Do a search for Panos29, you will find a layout there designed by Panos using the ADC804 for the 64 step ladder as per the Aleph V1.00 volume control.

If you care to be patient however , Wayne Coburn of Passlabs has a remote passive preamp project in the wings which I understand will be 256 steps.

I should think this will be an excellent design looking at Wayne's previous handy work.

Good luck

Ian

jleaman · 18th January 2003, 10:49 PM

Quote:

Originally posted by macka
Guys,

Do a search for Panos29, you will find a layout there designed by Panos using the ADC804 for the 64 step ladder as per the Aleph V1.00 volume control.

If you care to be patient however , Wayne Coburn of Passlabs has a remote passive preamp project in the wings which I understand will be 256 steps.

I should think this will be an excellent design looking at Wayne's previous handy work.

Good luck

Ian

when is he going to post info and laout plans or info to build it. Im under his wings and want his stuff. LOL..

J'

Cobra2 · 18th January 2003, 11:44 PM

Hi, all!
I'm also building a new pre-amp, and my plan is to use a remote-kit from here; http://www.circuitsonweb.com/resourc...jects/mir.html
It's so cheap (compared to others) that I just had to take the chance...
I guess it probably will be easier to drive a motor-pot than a relay-based pot with this?

Arne K
NORWAY

Thomas · 19th January 2003, 12:46 AM

Hi Nick

At this moment I'm doing a layout for the Aleph P volume control on a seperate PCB. I plan for a preamp made out of Aleph L circuitry but with aleph P 1.0 (ADC0804) style volume control.

I've finished boards for Aleph L1.2 PSU and Aleph L1.2 amp boards a few days ago and are currently doing the volume board. I wish to use 8 bits instead of only 6 as in Aleph P, but there is some instability issues in the LSB I have to solve.

If you are interested in this project you have to wait untill I'm finished.

No, realy. It took me less than 1 week to do the PSU and amp boards, but I'm facing examens within three weeks, so I realy don't know. Maby one, maby four weeks.

panos29 · 19th January 2003, 11:22 AM

So, as it seems, there is some some demand for my pcb design so I post it here. Note though that my design incorporates and alephL stage mated with aleph p volume control. I should also note that the volume has some kind of instability from time to time but nothing serious.(something has to do with the lsb bit of the adc0804, but i am not a digital wizard). The pre is built some 11 months ago and serves well til now. However I noticed on my scope that when the input is more than 4Volts there is some serious distortion on the waveforms, especially in low setting of the volume control that is probably due to the overloading of the output stage because of the powerfull signal on the small ohmic value of the low settings. If u use it full clockwise it works good to about 20volts rms output.

Sincerely,

Panos

loovet · 19th January 2003, 01:37 PM

How about this one...

xsnailx · 19th January 2003, 04:13 PM

shouldnt we use latching relays instead
i know it is a tricky one but i think it is worth exploring

18th January 2003, 07:00 PM	#1
ElectroNick diyAudio Member Join Date: Dec 2002 Location: The Netherlands	Wanted : design PCB for relay controlled volume I'm looking for a PCB design for a relay controlled volume potmeter. Anyone made such a PCB ? I'm trying to build a system like shown in the Pass Aleph P manual. It looks that relay control has less problems/costs than a analog pot (unless u use a stepped switch) So if anyone made such thing or has ideas of usefull links....please ! Gr, Nick

18th January 2003, 11:44 PM	#6
Cobra2 DIY ! diyAudio Member Join Date: Apr 2002 Location: Stavanger, Norway	Aleph P Hi, all! I'm also building a new pre-amp, and my plan is to use a remote-kit from here; http://www.circuitsonweb.com/resourc...jects/mir.html It's so cheap (compared to others) that I just had to take the chance... I guess it probably will be easier to drive a motor-pot than a relay-based pot with this? Arne K NORWAY

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18th January 2003, 07:13 PM	#2
jleaman Banned Join Date: Apr 2002	yeah id like to get one too.

18th January 2003, 08:12 PM	#3
xsnailx diyAudio Member Join Date: Dec 2002 Location: Poland, Cieszyn	i would be intersted too

18th January 2003, 10:45 PM	#4
macka diyAudio Member Join Date: Dec 2001 Location: Australia	Guys, Do a search for Panos29, you will find a layout there designed by Panos using the ADC804 for the 64 step ladder as per the Aleph V1.00 volume control. If you care to be patient however , Wayne Coburn of Passlabs has a remote passive preamp project in the wings which I understand will be 256 steps. I should think this will be an excellent design looking at Wayne's previous handy work. Good luck Ian

19th January 2003, 12:46 AM	#7
Thomas diyAudio Member Join Date: May 2001 Location: Right here	Hi Nick At this moment I'm doing a layout for the Aleph P volume control on a seperate PCB. I plan for a preamp made out of Aleph L circuitry but with aleph P 1.0 (ADC0804) style volume control. I've finished boards for Aleph L1.2 PSU and Aleph L1.2 amp boards a few days ago and are currently doing the volume board. I wish to use 8 bits instead of only 6 as in Aleph P, but there is some instability issues in the LSB I have to solve. If you are interested in this project you have to wait untill I'm finished. No, realy. It took me less than 1 week to do the PSU and amp boards, but I'm facing examens within three weeks, so I realy don't know. Maby one, maby four weeks.

19th January 2003, 04:13 PM	#10
xsnailx diyAudio Member Join Date: Dec 2002 Location: Poland, Cieszyn	shouldnt we use latching relays instead i know it is a tricky one but i think it is worth exploring