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Remote preamp volume control choice
Remote preamp volume control choice
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Old 21st October 2018, 08:21 PM   #1
keilau is offline keilau  United States
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Default Remote preamp volume control choice

What is the pros and cons of CS3310 digital volume control vs. a motorized ALPS potentiometer?
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Old 21st October 2018, 08:27 PM   #2
nimnul is offline nimnul
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Choose instead a stepped relay ladder volume for best result.
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Old 21st October 2018, 08:59 PM   #3
keilau is offline keilau  United States
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Quote:
Originally Posted by nimnul View Post
Choose instead a stepped relay ladder volume for best result.
It is a good idea in theory.

To get a -90dB control in 0.5dB steps will need 180 relays? It may be a bit bulky, not say expensive to implement. A -90dB control in 0.5dB steps may not be necessary. What is a generic implementation like? Did anyone make a PCB and BOM for it? Thank you for the information.
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Old 21st October 2018, 09:01 PM   #4
scottjoplin is offline scottjoplin  Wales
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Old 21st October 2018, 09:01 PM   #5
nimnul is offline nimnul
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No, not really. 7 relays will make 128 steps.
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Old 21st October 2018, 09:10 PM   #6
keilau is offline keilau  United States
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Quote:
Originally Posted by nimnul View Post
Choose instead a stepped relay ladder volume for best result.
Are you thinking about something like this, or similar?
Remote control Passive Volume Control with Display
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Old 21st October 2018, 09:12 PM   #7
keilau is offline keilau  United States
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Quote:
Originally Posted by nimnul View Post
No, not really. 7 relays will make 128 steps.
I am new to this concept. Can you link a schematic? Is there a control IC designed for this? Thank you.
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Old 21st October 2018, 09:14 PM   #8
nimnul is offline nimnul
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Quote:
Originally Posted by keilau View Post
Are you thinking about something like this, or similar?
Remote control Passive Volume Control with Display
Exactly, there are many options.
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Old 21st October 2018, 09:25 PM   #9
nimnul is offline nimnul
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Assembled HIFI remote volume control board 128 steps dual display 50K | eBay
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Old 21st October 2018, 09:25 PM   #10
nimnul is offline nimnul
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Just add a buffer stage and you are done
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