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variable resistor... what potentiometer?

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kardzzz

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Hi Guys,
I need a variable resistor between the range 10k-100k. What potentiometer value do I look for?
in terms of wiring, Do I connect the middle pin and one other together hence making it a 2 pin device?
Thx
 
Hi Guys,
I need a variable resistor between the range 10k-100k. What potentiometer value do I look for?
in terms of wiring, Do I connect the middle pin and one other together hence making it a 2 pin device?
Thx

In what circuit is the pot going to be used.?
 
I will be using the variable resistor with a 555 timer. I want to be able to change the frequency between 2 ranges and know that i require 10k to 100k
thx
 
Which ever value you choose, make sure your pot has a linear taper, not an audio taper!
Also, while a higher resistance value will give you greater range, a smaller value will allow for finer adjustment, so you need to decide which is more important to your particular project.
 
If a value between 10 and 100K is needed use a combination of a fixed 10K resistor and a pot of 100K.

Using just a 100K pot you'll be able to crank it down to a value of zero Ω, thus making the timer circuit inop.

Boncuk
 
If a value between 10 and 100K is needed use a combination of a fixed 10K resistor and a pot of 100K.

Using just a 100K pot you'll be able to crank it down to a value of zero Ω, thus making the timer circuit inop.

Boncuk

Also you might consider using a 10 turn trim pot rather then a single turn standard pot, it makes adjustments much easier if it's a set and forget application.

Lefty
 
Also you might consider using a 10 turn trim pot rather then a single turn standard pot, it makes adjustments much easier if it's a set and forget application.

Lefty

... and last not least less sensitive to bumps which might happen during usage of a circuit. A 10 to 25 turn trim pot is driven by a worm gear, and changing the pot adjustment inadvertantly can only happen if the bumps are in resonance with the worm shaft making it rotate.

Boncuk
 
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