These dual-channel sliders are common among cheaper stereo radio receivers of the past as they would control volume for both audio channels at the same time.
FYI, the proper name for these is "Dual Ganged, Slide Potentiometer". Dual ganged means that the two resistor elements are isolated, but they respond to the same physical input. When buying these, watch out for whether you're buying a linear one, like the one in this video, or the 'audio taper' variety that responds non-linearly. These ones are preferable when manipulating signals where an logarithmic response is desired, such as audio. For even more fun, these 'pots' can be bought with small motors so the output of the pot can be adjusted by your circuit and/or program.
I used three 1MOhm ones for controlling the colour of an LED Strip. I wired the linear pot in such a way that the two 1Ms were in series, giving 2MOhm, then I connected the base of a Transistor with a small as possible gain, I think it was around 15 or so :) and wired it to the led Strip. It worked a treat, and I can manually create all the colours I want, and learn how much rgb it is. The whole thing is now lighting up the inside of my selfmade reflow-oven. ..
Hi David, thanks for your video! In audio usually logarithmic potentiometers are used. This is because human hearing is not linear and to give the user more control around unity gain (the "0db mark"). For example: In the beginning of the channel a movement of 10mm corresponds with 30db volume increase, whereas further up the channel the same movement corresponds to 10db volume increase.
I salvaged mine from an old broken lighting board. Very usefull little things. Mine dont have the circuit board attached. Just bare pins on the underside. I soldered wires on to use with breadboard.
I love your voice. So relaxing. Just please lower your mic speaker, it's gotten increasingly louder and more of an echo over last few months. Can't get volume at the right level so I can hear that great voice without hurting my ears. Luv u man!!
See if you can attach a motor to it and turn it into a servo :P You can even use the circuit board from a spare/old/damaged servo and build a "linear actuator" type thing :D
Hi David. How you are well. So my keyboard’s volume slider finally packed up. (Roland EP7) very old model.(1990) . I would like to know what would be the outcome if I had to replace the 10k B x2 slide potentiometer with a single 10k slide potentiometer… my keyboard just finally stopped pushing out volume…
The taper just describes the resistance profile (I think) B isn't linear. So the resistance will be the same from 0-10k but it'll be a different volume across the range of movement but it will still work. Not sure what the x2 means, two slide pots?
I think someone else said this in the comments (so props to them) but human hearing isn't very linear so that is why those potentiometers are different.
@@KennethNicholson1972 They exist in mono since many audio mixing consoles have mono channels so you have two faders as they are called for the two channels.
These dual-channel sliders are common among cheaper stereo radio receivers of the past as they would control volume for both audio channels at the same time.
Jason Simpson I believe you are thinking of logarithmic dual sliders (for volume control), not linear.
FYI, the proper name for these is "Dual Ganged, Slide Potentiometer". Dual ganged means that the two resistor elements are isolated, but they respond to the same physical input.
When buying these, watch out for whether you're buying a linear one, like the one in this video, or the 'audio taper' variety that responds non-linearly. These ones are preferable when manipulating signals where an logarithmic response is desired, such as audio.
For even more fun, these 'pots' can be bought with small motors so the output of the pot can be adjusted by your circuit and/or program.
Stereo ... Left and Right channels for audio mixing... probably the most common use. Simple, but great fun!
I used three 1MOhm ones for controlling the colour of an LED Strip. I wired the linear pot in such a way that the two 1Ms were in series, giving 2MOhm, then I connected the base of a Transistor with a small as possible gain, I think it was around 15 or so :) and wired it to the led Strip. It worked a treat, and I can manually create all the colours I want, and learn how much rgb it is. The whole thing is now lighting up the inside of my selfmade reflow-oven. ..
That sounds pretty ace, I bet it is a lot of fun throwing those sliders up and down.
Hi David, thanks for your video! In audio usually logarithmic potentiometers are used. This is because human hearing is not linear and to give the user more control around unity gain (the "0db mark"). For example: In the beginning of the channel a movement of 10mm corresponds with 30db volume increase, whereas further up the channel the same movement corresponds to 10db volume increase.
Not see you about for a while Dustin. I might have to pick up a logarithmic one too!
@@DavidWatts I've not been able to participate in the online community as I would have liked...
Funny you talked about audio equipment, I used to work for a company call Soundcraft and saw a lot of these. The motorised ones are good fun.
Lighting boards might use them still . Perhaps they are using now using hall effect for scene and cues
I have seen apps used in the industry on iPad type things but I have to admit I forgot about lighting boards.
I salvaged mine from an old broken lighting board. Very usefull little things. Mine dont have the circuit board attached. Just bare pins on the underside. I soldered wires on to use with breadboard.
Thank you for posting this video, it helped me work out my projects wiring!
What a coincidence - I've just ordered a few of these to add to my parts accumulation.
Perfect for my transporter controls ;)
This will be useful for my FSX throttle.
I love your voice. So relaxing. Just please lower your mic speaker, it's gotten increasingly louder and more of an echo over last few months. Can't get volume at the right level so I can hear that great voice without hurting my ears. Luv u man!!
weird af
I wonder how these might look into an archtop guitar wooden pickguard, I see that there are 500k as well
Can use as a virtual pinball plunger
He he, I've just ordered some of them :)
There is nothing you can buy that you don't already have in electronics ;-)
See if you can attach a motor to it and turn it into a servo :P You can even use the circuit board from a spare/old/damaged servo and build a "linear actuator" type thing :D
Hi David. How you are well. So my keyboard’s volume slider finally packed up. (Roland EP7) very old model.(1990) . I would like to know what would be the outcome if I had to replace the 10k B x2 slide potentiometer with a single 10k slide potentiometer… my keyboard just finally stopped pushing out volume…
The taper just describes the resistance profile (I think) B isn't linear. So the resistance will be the same from 0-10k but it'll be a different volume across the range of movement but it will still work. Not sure what the x2 means, two slide pots?
i hove you still active , is there another model the is more accurate?
Where did you get the power distribution PCB with barrel jack and pins etc. to bring (what I assume is 5V regulated) into the board?
Yo! You can pick one up for pennies. "breadboard power supply" will get you there. It brings out 5v, 3.3v and VIN
Can I use one output to Arduino and the other with a led ?
I have one of these slidey things and this is the first vid I’ve come across that gives me an excuse to play with it... 👍🏻 🧐 🐍
Better to have something and not need it, than to need something and not have it
I'll let you know if I am £1 short for the roof over my head ha ha ha
These things are usually inspirational rather than fully practical to be honest
Why do you sound EXACTLY like Steve Mould?
is there a way to use these linear ones for volume control? When I connect those, they jump a big difference. Nearly 60% of the trail seems useless.
I think someone else said this in the comments (so props to them) but human hearing isn't very linear so that is why those potentiometers are different.
@@DavidWatts Yes, log ones are for sound, I was just wondering if there's a way. I have a bunch of these lying around, that's why. :)
can it support 12v?
Does this work with Arduino?
Why do you choose the vc97 over the 61e?
Bigger digits and the 61e battery is running low. Otherwise I am 61e all the way.
First!
Didn't realise that they had 2 channels.
How else can you control stereo audio volume.
@@KennethNicholson1972 They exist in mono since many audio mixing consoles have mono channels so you have two faders as they are called for the two channels.
Very helpful