40106 lunetta drone

Deedalo12 · Joined: Oct 28, 2021 Posts: 10 Location: Buenos Aires

Hi happy new year! im tryiing to do my first "lunetta machine" (im continue failing XD) and now i have this problem:

I have to cables soldered in to the pcb that goes to a 5v breadbord powersuply. I cant get sound when i plug some of the out of the 40106. In one out y have noise that modulates with one of the potenciometers.

I saw the conexion good, use a multimeter to chek it, maybe must have missed something.

[img]https://ibb.co/Kjpm9y6C[/img]
[img]https://ibb.co/gLGT9xsk[/img]

blue hell · Posted: Fri Jan 09, 2026 3:05 am Post subject:

I've added the images from the above post by using the first BB code mentioned ;

Posted Image, might have been reduced in size. Click Image to view fullscreen.

elektrouwe · Joined: May 27, 2012 Posts: 149 Location: Germany

PHOBoS · Posted: Tue Jan 20, 2026 10:36 am Post subject: Re: 40106 lunetta drone

mosc · Posted: Sat Jan 24, 2026 2:16 pm Post subject:

I don't see the center pins on the pots connected to anything. Of course, if you just use the outside pins you just have a non-variable resistor.