Mystery Potentiometer Cherkfan r1610ny I'm looking for more info in ( English ) on this Mystery Potentiometer that is part of my Guitar Circuit. Can anyone help me find a data sheet in English?
February 01, 2013
Had a Google. No luck.
You need to characterise it.
1) Disconnect 2 of the three wires.
2) Using an Ohmeter, find which are the two ends of the track - not the slider - and note the resistance, R.
3) Connect a suitable voltage V across these terminals (keep V^2/R < 250mW), +V to one end 0V to the other;
4) Connect a voltmeter from 0V to the slider.
5) The slider will rotate about 300 degrees, maybe more, maybe less. Mark on a graph a horizontal axis of 0 to 300 degrees or whatever it is in, say, 30 degree steps. Make the steps equal, i.e. the horizontal axis is linear.
6) measure the voltage at those steps, i.e,; 0 degrees, 30 degrees, 60 degrees and so on up to the max rotation.
7) Plot these voltages on a linear vertical axis of your graph.
If the line you get on the graph is roughly linear voltage vs angle then you have a linear pot of value R.
If the line you get on the graph is curved then you almost certainly have a log or an antilog pot of value R. It is certainly a non-linear pot.
If you take the log of each voltage and plot them on a linear vertical axis and you get a roughly straight line then you have a log pot. The line won't be exactly straight because so called log pots are rarely exactly log all the way round. If I recall correctly they tend to turn more linear at one extreme or the other.
Have a Google/Wiki about potentiometer laws or "tapers".
Then order one like it from Farnell etc.
February 01, 2013
CircuitLab is an in-browser schematic capture and circuit simulation software tool to help you rapidly design and analyze analog and digital electronics systems.
|New @ CircuitLab|