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Power-switch & Volume-control in one?
Power-switch & Volume-control in one?
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Old 22nd October 2019, 03:53 PM   #1
myleftear is offline myleftear  Switzerland
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Power-switch & Volume-control in one?
Default Power-switch & Volume-control in one?

Hello everyone!

Im in the process of Building my own gear, quite basic, and think about making it as minimalistic (looking &#129299 as possible. (Ill end up with some rather fancy stuff inside but thats ok.)
Heres what bites me for the moment: Id like to combine the power on/off and the volume-knob, just like in these old pocket-transistor-radios... on the other hand, Im drooling over those ladder-attenuators...
Can they be brought together somehow (electronically, mechanically, ...)

Thanks already!
Da.
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Old 22nd October 2019, 05:04 PM   #2
DF96 is offline DF96  England
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Putting 230V AC about a cm from an audio signal is not always a good idea.
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Old 22nd October 2019, 06:47 PM   #3
myleftear is offline myleftear  Switzerland
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Power-switch & Volume-control in one?
I guessed so. :-)
I rather imagined something like triggering a relay, electronically or mechanically (with a sort of a "dent"). How are those made?
I'm convinced a solution is possible, but I prefer to look around before reinventing stuff ...

on/off is combined with the band-selector:
https://images-na.ssl-images-amazon....AC_SL1200_.jpg

on/off is combined with the volume:
https://ae01.alicdn.com/kf/HTB1DrtOv...ered-Tuner.jpg
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Old 22nd October 2019, 07:41 PM   #4
russc is offline russc  England
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How about a rotary encoder cw momentary contact push switch?
The fancy stuff inside would need to include a microprocessor!
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Old 22nd October 2019, 07:53 PM   #5
myleftear is offline myleftear  Switzerland
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Power-switch & Volume-control in one?
Quote:
Originally Posted by russc View Post
How about a rotary encoder cw momentary contact push switch?
The fancy stuff inside would need to include a microprocessor!
Yes! (even less ideas how to make this work, though)

Or, if there'd a way to "turn it on" the contact push switch could then also be used as input selector (instead of power on/off)?
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Old 22nd October 2019, 08:08 PM   #6
ubergeeknz is online now ubergeeknz  New Zealand
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Plenty of tutorials online for doing all kinds of things with an Arduino. It's not as difficult as you might imagine Power-switch & Volume-control in one?
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Old 22nd October 2019, 08:10 PM   #7
ubergeeknz is online now ubergeeknz  New Zealand
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Another trick would be a cam which triggers a microswitch on a low power independent "standby" DC supply, the microswitch activates a larger relay on the mains input for the main transformer. There's actually many ways you could skin this cat...
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Old 24th October 2019, 08:46 PM   #8
Andersonix is offline Andersonix  Sweden
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Power-switch & Volume-control in one?
If it's "basic" and "minimalist" then why even have a power switch? Let it come on when it's plugged in.
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Old 25th October 2019, 09:07 PM   #9
Vovk Z is online now Vovk Z  Ukraine
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Power-switch & Volume-control in one?
Quote:
Originally Posted by myleftear View Post
Here‘s what bites me for the moment: I‘d like to combine the power on/off and the volume-knob, just like in these old pocket-transistor-radios... on the other hand, I‘m drooling over those ladder-attenuators...
It's ok ONLY if that is a battery-powered device or you put a switch in low-voltage secondary power lines, isolated from primary mains (mains are always connected).

Last edited by Vovk Z; 25th October 2019 at 09:09 PM.
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Old 25th October 2019, 09:08 PM   #10
Vovk Z is online now Vovk Z  Ukraine
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Power-switch & Volume-control in one?
Quote:
Originally Posted by myleftear View Post
on/off is combined with the band-selector:
https://images-na.ssl-images-amazon....AC_SL1200_.jpg

on/off is combined with the volume:
https://ae01.alicdn.com/kf/HTB1DrtOv...ered-Tuner.jpg
- they are all battery powered! Don't do that with 110-230 VAC!
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