madbeanpedals::forum

Projects => General Questions => Topic started by: Govmnt_Lacky on December 18, 2016, 06:44:02 PM

Title: Need help with board mounted pot selection
Post by: Govmnt_Lacky on December 18, 2016, 06:44:02 PM
I am looking to use board mounted pots with a project. The PCB will have a 26mm Alpha enclosed rotary switch soldered to it like this one:

(http://cdn6.bigcommerce.com/s-sxoup5r/products/3238/images/4226/3P4T__95774.1409778527.1280.1280.jpg?c=2)

Do I need to use the standard right angle pin pots like these?

(http://cdn6.bigcommerce.com/s-sxoup5r/products/3450/images/4755/5206066__49495.1444923775.1280.1280.jpg?c=2)

OR... do I need the LONG pin version like these?

(http://cdn6.bigcommerce.com/s-sxoup5r/products/2611/images/3725/16mmLongPin__37140.1409778332.1280.1280.JPG?c=2)
Title: Re: Need help with board mounted pot selection
Post by: dbp512 on December 18, 2016, 06:58:03 PM
I believe the regular pots will be fine. If thats the same type of rotary as the multiplex uses, its only a bit taller than the regular length pcb pots. I've never actually used the long pins so I can't comment for sure, but I remember other users here saying that they are really damn long.
Title: Re: Need help with board mounted pot selection
Post by: matmosphere on December 18, 2016, 07:09:32 PM
There is a good explanation in the BOM for the 1776 Multiplex that explains how to use the standard right angle pots with that type of switch.
Title: Re: Need help with board mounted pot selection
Post by: davent on December 18, 2016, 07:35:36 PM
Just go with standard lugged pots and pieces of solid core wire to diy your perfect length pcb mount pot.

dave
Title: Re: Need help with board mounted pot selection
Post by: Govmnt_Lacky on December 18, 2016, 07:41:21 PM
Quote from: davent on December 18, 2016, 07:35:36 PM
Just go with standard lugged pots and pieces of solid core wire to diy your perfect length pcb mount pot.

dave

This is sort of what I usually do. I typically use solder lug pots and solder on resistor lead bits to extend them. I wanted to use a sturdier approach this time but wanted to get a consult before purchasing.

Ill look into the Multiplexer BOM. Thanks for the tip Mat  ;)
Title: Re: Need help with board mounted pot selection
Post by: davent on December 18, 2016, 07:47:48 PM
I've used 20awg and 22awg wires, the 20awg makes for a beast of a connection, the 22awg allows easier wandering, creative pot placement and still pretty decent support.

dave
Title: Re: Need help with board mounted pot selection
Post by: pickdropper on December 18, 2016, 10:04:01 PM
FWIW, with the FFX Clusterfuzz, we use standard board mount pots but we had to do a separate PCB/header arrangement for the rotary because it is taller than the Alpha 16mm pots.