Hi,
I'm looking for a linear pot with center tap, to use as a balance selector using Arduino and a digital potentiometer (WM8816 can set volume for L/R channels independently).
I have an old (broken) Rotel RA1000 amp balance pot, but it's logarithmic. It has 4 pins, one marks the center resistance, the other the resistance at each specific rotation angle. Same as this:
I've seen some in ebay, but none with 4 pins. So my question is, do linear pot with center tap and 4 pins exist? I guess I would be able to use one with 3 pins, just by using the normal resistance value when the pot is rotated to the center tap and then using that value to calculate channel deviation when rotating.
Thank you
Thank you
I'm looking for a linear pot with center tap, to use as a balance selector using Arduino and a digital potentiometer (WM8816 can set volume for L/R channels independently).
I have an old (broken) Rotel RA1000 amp balance pot, but it's logarithmic. It has 4 pins, one marks the center resistance, the other the resistance at each specific rotation angle. Same as this:
I've seen some in ebay, but none with 4 pins. So my question is, do linear pot with center tap and 4 pins exist? I guess I would be able to use one with 3 pins, just by using the normal resistance value when the pot is rotated to the center tap and then using that value to calculate channel deviation when rotating.
Thank you
Thank you
yes, it'd be much easier, but I don't want
1. clicks (just the central one), nor
2. infinite rotation
thank you anyway for the idea
Why not use a separate voltage divider for the centre-tap - functionally equivalent if you aren't passing any current to the wiper or centre tap? And lower noise as it can be metal film.