I was looking for a simple pot and I ran into this and it has continuous rotation?
How is this possible? Say I wanted to read the analog value of this, after 360 degrees of rotation does it just go back to analog 0?
It will rotate from 0 Ohms up to its max, and then back to 0. So depending on how you hook up your pins, yes, it could just go back to an analog input of 0.
Thank you
I have seen pots like those ind old Tektronix test-equipment. The output is read by an analog input, and the software can then detect how long the pot has traveled by the amount of change in voltage. A quick jump from low to high, or vice versa is no problem, the software know this is only possible by turning it past it's zero-point.
// Per.
THLL:
I was looking for a simple pot and I ran into this and it has continuous rotation?6639S-1-102 Bourns Inc. | Potentiometers, Variable Resistors | DigiKey
How is this possible? Say I wanted to read the analog value of this, after 360 degrees of rotation does it just go back to analog 0?
Yes, eventually, as there will always be a small wiper terminal 'discontinuity' between the 100% and 0% resistance where the wiper will not have any connection to the other two pot terminals, and will present a floating input to whatever you are wiring the wiper to. This may or not be something you have to deal with depending on the application the pot is used in.
The electrical range is roughly 340 degrees of rotation so there is a "dead" area of about 20 degrees.