Circuitbenders Forum

Circuitbenders Forum => Circuitbending discussion => Topic started by: kick52 on December 11, 2007, 10:39:09 PM

Title: How do I wire those trim pot clock speed/pitch things? (Like in VTech toys)
Post by: kick52 on December 11, 2007, 10:39:09 PM

They are like this:

   0. 0 0
0            0      (0 = solder point)
   0    0.

On the surface they are little metal boxes with a screw on top like a trim preset pot.
Screwing it makes the pitch go up down/up.
If I connect the solder points with a dot next to each other, it does an insane pitch bend, though you cannot use more resistance for less pitch..

How do I wire these bitches up? Or is it not a potentiometer?

Title: Re: How do I wire those trim pot clock speed/pitch things? (Like in VTech toys)
Post by: the_zombiest on December 12, 2007, 12:53:46 AM

As far as i'm aware, the thing you're describing is a coil. They function kinda like a crystal resonator does, meaning that you can't just replace it with a pot. You've gotta replace it with an oscillator if you wanna pitch bend.
Sailormouth has some osc schematics on his page.
http://www.sailormouth.org/index2.php?pg=useosc.inc
Hope it helps :)

Title: Re: How do I wire those trim pot clock speed/pitch things? (Like in VTech toys)
Post by: kick52 on December 12, 2007, 09:56:12 AM

Ah thanks, that helps alot.