Capacitor selector switch.. Teach Me!

[swelchy]

How do I mod a switch to select a different cap value? I did as pictured and my build is not working.. only getting bypass mode.. did I do this wrong?
I used a dpdt on/on toggle.

 

[benny_profane]

Did the circuit work before adding the switch? The diagram you’ve provided is correct.

 

[swelchy]

Did the circuit work before adding the switch? The diagram you’ve provided is correct.

its fresh build.. it's a kliche.. I've built probably 8-9 kliche's previously but maybe I did something wrong... I'll double check

 

[BryGuy]

Looks correct. Sure you have a good switch?

 

[swelchy]

lol.... omg. Just popped it open and I had one of the TL072 in backwards... Spun it around and all is well.. I'm a goof

 

[Ale_jellybelly]

Would it work as a Vibrobot speed selector switch?
as described here

 

[Feral Feline]

View attachment 87028
Would it work as a Vibrobot speed selector switch?
as described here

That'll work. You could make it an on-off-on and keep C6 as 100n for
super-slow / super-fast / stock (medium-fast).

If you don't have the SPDT on-off-on, but have a DPDT on-off-on you could have all the caps on the switch and just fly the wires to the PCBs C6-pads.

Use a DPDT on-on-on and you can then have the speed in proper order of magnitude:
Slow/Moderate/Fast.

The following should work, too:
Install the 100n, then add the 470n on a POT, blending the 470n in with the 100n in parallel for a fully adjustable speed-dial.

 

[Ale_jellybelly]

That'll work. You could make it an on-off-on and keep C6 as 100n for
super-slow / super-fast / stock (medium-fast).

If you don't have the SPDT on-off-on, but have a DPDT on-off-on you could have all the caps on the switch and just fly the wires to the PCBs C6-pads.

Use a DPDT on-on-on and you can then have the speed in proper order of magnitude:
Slow/Moderate/Fast.

The following should work, too:
Install the 100n, then add the 470n on a POT, blending the 470n in with the 100n in parallel for a fully adjustable speed-dial.

Thanks!
I think I'll put a socket and try some stuff.
Leaving c6 as 100nf would put the caps on the switch as parallel right?

 

[Feral Feline]

That's right, so you'd add them together; 100n paralleled to the 220n = 320n; etc.

Experiment to find what 3 cap values (or just 2) are useful to you. Super-duper fast will give you a faux ring-mod effect.