Hello all,
First time posting here, hopefully this will be an easy one for you guys. I am having some issues with a potentiometer and I am not sure why, I am hoping someone can explain what I have dont wrong and what I can do when sizing resistors in the future
I am using an industrial computer with an analogue output (set to 10V) and a 25K potentiometer (25K Bourns 91 series) to control a fan speed (0-10Vdc) on a building site. This is so the air balancers can change the speed while I am not there. I chose a higher resistance of 25K so that there wouldn't be too much current draw and just a voltage reference point.
What seems to be happening is when the pot is dialed down low to around the 2.5Vdc output all of a sudden it jumps to 0V. Why would this be happening?
2.5Vdc - 10Vdc output works fine, I just cant get any control between 0Vdc-2.5Vdc. Any ideas? Also the pot is very sensitive so mabye I need one with more turns for the full range?
Thanks,
James
First time posting here, hopefully this will be an easy one for you guys. I am having some issues with a potentiometer and I am not sure why, I am hoping someone can explain what I have dont wrong and what I can do when sizing resistors in the future
I am using an industrial computer with an analogue output (set to 10V) and a 25K potentiometer (25K Bourns 91 series) to control a fan speed (0-10Vdc) on a building site. This is so the air balancers can change the speed while I am not there. I chose a higher resistance of 25K so that there wouldn't be too much current draw and just a voltage reference point.
What seems to be happening is when the pot is dialed down low to around the 2.5Vdc output all of a sudden it jumps to 0V. Why would this be happening?
2.5Vdc - 10Vdc output works fine, I just cant get any control between 0Vdc-2.5Vdc. Any ideas? Also the pot is very sensitive so mabye I need one with more turns for the full range?
Thanks,
James