• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Variable Resistors

Status
Not open for further replies.

afs87

New Member
Could somebody please tell me what the difference is between a linear and log. variable resistor please. Also why do variable resistors have 3 outputs? I only use 2 --- is this wrong?

Thankyou.
 

kinjalgp

Active Member
The resistance of linear potentiometer (or variable resistor) varies linearly with wiper movement whereas that of log. pot. varies on a logarithmic scale.

Pot. has three terminals. The resistance between end terminals is fixed whereas the centre terminal which is connected to the wiper has variable resistance with either of the fixed resistance end terminals.

In most applications, one fixed terminal and the wiper are shorted thereby forming a two terminal variable resistor.
 
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top