Thursday, August 2, 2012
Simple mixer for my modular synthesizer
I found the schematic here and modified it just a little bit by adding some Caps on the input. From what I've come to understand, Caps will help filter out DC? I dunno, I'm really just kind of playing around over here. It occurs to me now that I could have put a Cap on the output too.
I built it on a breadboard first without the caps and it seemed to work fine.
So I went ahead and tried out with the caps. It all worked so I stuck it in a perf board and soldered it up.
Turned it into a module.
The mixer is on the Right. just to the left of my Ring Modulator which I haven't written about because I'm still working on it. You can see the mixer has 4 inputs above and an output below.
I build these modules with the intent, to return to them--after my knowledge has grown-- and modify them. I will eventually add some trim pots to this circuit for volume control.
One of the cool things about building a modular synth, is being able to work in steps. Each modules is isolated and if one doesn't work, I can still chug along trying different stuff--teaching myself all along the way. They also share a common power supply, meaning I don't have to build that circuit each time. There's nothing quite like learning by necessity, and I've learned more about electronics in the last 3 months than I did in the 8 years prior.
ps. My portamento module worked but I'm waiting on some supplies to come from Jameco before I solder it up.