10k pot problem

[jamroll]

Hi guys can anybody tell me why my 10k precision pot in my power supply project goes anti clock to increase the voltage and clock wise to decrease it its wired correct to the layout their are 3 pins have i got them the wrong way round i am building a project from DRONEBOT WORKSHOP site which is great for a beginner like me got it working but this does frustrate me thanks

 

[bertus]

Hello,

What type of potmeter did you use?
Is it a multiturn from bourns?

Precision Pots Multiturn

Bourns precision potentiometers (potentiometer) are designed for control applications where accuracy and high-reliability is important."

www.bourns.com

Bertus

 

[Kiwi]

My guess would be that you have got the two power supply wires on the wrong terminals.
Leave the signal/wiper/output wire where it is and swap the other two over.

 

[jamroll]

many thanks

 

[AnalogKid]

Many pots have pin numbers molded into the body somewhere. For the ones that do, the most common pin assignment is:

1 - CCW - the counter-clockwise end of the resistive element.

2 - Wiper

3 - CW - the clockwise end of the resistive element.

If the pot is not a pcb type, then the most simple thing to try first is reversing the wires to pins 1 and 3. If it is pcb-mount, then consider desoldering the pot from the board, and reconnecting it with pins 1 and 3 reversed using short jumpers. In this way you can test if this is the correct solution before cutting and jumpering traces.

ak

 

[jamroll]

Hi thanks thats very helpful will try it