Comments on: Resistors 5: Pots

By: kryss

kryss — Mon, 05 Sep 2011 13:25:04 +0000

i’m so new to electronics and my professor ask us to make an electronic project(where our main requirement is to make a pcb). i decided to make a light sensitive alarm because i thought it would be good to start making a project i’m interested in and i thought it was a simple project(for me, i guess). i started the project by buying all the components before i made a pcb layout… my problem is how do i add a preset resistor in the layout? its an adjustable resistor and i need it for the light sensitivity and bleeper duration. it has three pins but i’m just used to the ones with two pins. i found the project in the website called Electronics club.
-is it okay if instead of using the preset resistors, i just use the two pins resistor with the same value?

By: JohnG

JohnG — Sat, 30 Jul 2011 13:52:59 +0000

neldom: The (central) wiper connection can sometimes go bad and no circuit is made. Having the 2 lugs tied together ensures that if the wiper connection DOES go bad, you’ll at least still have a complete circuit that will work; just a little safety net

By: neldom

neldom — Wed, 23 Feb 2011 19:17:06 +0000

What is the difference between the variable resistor method with the 2 lugs tied together and just using one lug and the wiper, leaving the third wiper empty.
Why do you see them used the two different ways?

Regards,
Neldom

By: gaussmarkov

gaussmarkov — Tue, 28 Oct 2008 00:07:40 +0000

hi chris,

thanks for the note. you are right about there being a problem with that text. i can only guess that i meant “with the complete resistive strip between lug2 and lug1.”

cheers, paul

By: Chris Haughey

Chris Haughey — Thu, 23 Oct 2008 15:55:04 +0000

Hi Paul – I love this site!
One thing I noticed which confused me a little . . .

“On the other hand, when the pot is “turned up” (fully clockwise), lug 2 is connected directly to lug 3 with the complete resistive strip between them.”

Should this be “…lug 2 is connected to lug 3 without any resistive strip between them” OR “…lug 2 is connected to lug 1 with the complete resistive strip between them” ?

By: Electronics-Lab.com Blog » Blog Archive » [Basic Electronics] - Resistors Tutorial

Fri, 01 Feb 2008 09:41:51 +0000

[...] Resistors 5: Pots [...]

By: gaussmarkov

gaussmarkov — Wed, 16 Jan 2008 19:56:28 +0000

Absolutely! Thanks for pointing out that mistake. I will fix it now.

By: Mike Olson

Mike Olson — Wed, 16 Jan 2008 16:11:11 +0000

“If you hook up a volume pot the way the voltage divider is drawn in the schematic, with the voltage source connected to lug 3, ground connected to lug 2, and the output connected to lug 2 …”

Shouldn’t this be “… ground connected to lug 1…”?