Digitally controlled relay volume regulator

veteran · 20th September 2009, 11:20 AM

This is something that we (Peter Daniel and I) built – digital potentiometer with fully analog signal path. What's most important – input impedance is constant (excluding fist three steps) just like in normal pot.

Features:
- attenuation from -56.8 to 0dB
- completely passive signal path
- constant input impedance (set by resistor network: 10k, 20k, 50k, …)
- great display (used in Mark Levinson products)
- control type: infrared remote, buttons, encoders
- 6 input selector (additional mute output and on/off relay) connector

jam · 20th September 2009, 12:52 PM

How many steps and when are you arranging a group buy?

Jam

piero7 · 20th September 2009, 01:06 PM

Cool! Waiting for a group buy!

veteran · 20th September 2009, 08:26 PM

131 steps in this version and for a group buy - I can prepare limited amount of such sets (first four with display):

jormajj · 20th September 2009, 08:30 PM

count me in !

joemana · 21st September 2009, 04:41 AM

How much is the unit cost ?

gooki · 21st September 2009, 08:50 AM

What would it take to make an 8 channel version (with or without lcd display)?

CeeVee · 21st September 2009, 11:04 AM

I'm in as well.

Could we have some more info on the project, and pricing for the boards and PIC?

arthur · 21st September 2009, 11:21 AM

me2!
1 want 4 sets

veteran · 21st September 2009, 08:02 PM

I will calculate the cost, prepare the BOM list and let you know.

And for multichannel connection - yes, this is possible. As you can see there are two connectors that easily drive 4 or 6 channels simultaneously (maybe even 8 with darlington transistors).

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20th September 2009, 12:52 PM	#2
jam diyAudio Member Join Date: May 2001 Location: Charlotte,NC,USA	How many steps and when are you arranging a group buy? Jam

20th September 2009, 01:06 PM	#3
piero7 diyAudio Member Join Date: Apr 2009 Location: Matera	Cool! Waiting for a group buy!

20th September 2009, 08:30 PM	#5
jormajj diyAudio Member Join Date: Nov 2002 Location: Finland	count me in !

21st September 2009, 04:41 AM	#6
joemana diyAudio Member Join Date: Oct 2006 Location: San Jose	How much is the unit cost ?

21st September 2009, 08:50 AM	#7
gooki diyAudio Member Join Date: Dec 2008	What would it take to make an 8 channel version (with or without lcd display)?

21st September 2009, 11:04 AM	#8
CeeVee diyAudio Member Join Date: Dec 2006	I'm in as well. Could we have some more info on the project, and pricing for the boards and PIC?

21st September 2009, 11:21 AM	#9
arthur diyAudio Member Join Date: Oct 2001 Location: .	me2! 1 want 4 sets

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