Sound to light circuit suggestions?

[jubal81]

Working on a project and I'd like to add some groovy light effect. Breadboarded a couple sound-to-light circuits and found that using an entire optical compressor sidechain gives a very nice and smooth result. Problem of course is it's a lot of circuit.


Wondering if anyone has suggestions for something simpler with a smooth response.

[alanp]

If you google "Colour Organ" you'll get a few dozen circuits

It was a very popular disco effect.

[m-Kresol]

there is a VU meter on THcustoms website (iirc along with the Uboat suboctave pedal). It's based around just one IC and works quite well and has a low part count.

I've built it in SMD a while back: http://www.madbeanpedals.com/forum/index.php?topic=23911.msg233946#msg233946

[Leetut]

I used this one (LM386)




In this

[jubal81]

I used this one

https://postimg.cc/ZvByBzFb

In this

https://youtu.be/kYKYz5_5564

That is spectacular! Did you do a build report thread on that?

[Leetut]

Cheers man! I built a few to sell but haven't figured out how to do that yet 😂
https://postimg.cc/xcXTc0Qw

[Willybomb]

I used this in my Beast Mode.  This layout can be made quite a bit smaller if you take out the second row and you're willing to wire the resistor offboard on an LED and the grounds to wherever.

[somnif]

I used this in my Beast Mode.  This layout can be made quite a bit smaller if you take out the second row and you're willing to wire the resistor offboard on an LED and the grounds to wherever.

I'm assuming that's a 386? (or some similar audio amp?)

[HamSandwich]

I used this one

https://postimg.cc/ZvByBzFb

In this

https://youtu.be/kYKYz5_5564

That's so cool. How do the LED's light up at different times like that? Seems like chaos in a great way.

[Leetut]

Transistor led flasher
https://images.app.goo.gl/FPkW3cDRQqRiY5Nw9

[chromesphere]

sound to light fabbed pcb if you guys need it (scroll down):
https://oshpark.com/profiles/diyguitarpedals