# My build progress **URL:** \ **Category:** DIY STUFF\ **Created:** [March 1, 2020, 8:57pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345 "2020-03-01T20:57:53Z")\ **Posts on this page:** 1\ **Showing post:** 6057
**Author:** ![K.ostas](https://avatars.discourse-cdn.com/v4/letter/k/ed655f/32.png) [@K.ostas](https://lookmumnocomputer.discourse.group/u/K.ostas)\ **Post date:** [October 5, 2023, 5:41pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/6057 "2023-10-05T17:41:54Z")
In my last build I mentioned that I needed a proper mixer to explore the sounds that I could get from the fuzz distortion module so I set to build one. Initially I thought I’d build a stripped down version of Ken Stone’s [matrix mixer](http://synthpanel.com/modules/cgs33_matrix_mixer.html), but I quickly decided that it was an overkill for what I needed. So I built a classic “multiple inputs into two inverting op amps” kind. There must be quite a few variations of this topology, but I used a simplified version of @ShedSynth 's [mixer](https://shedsynth.wordpress.com/mixer/), that doesn’t use any switches or clipping indicator. ![20231005_112243](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/8/3/839d41c4b8e7e3e11c61d45a230b3201dc0e0cbd.jpeg) Now I am pretty sure that someone must have posted a stripboard layout for this in the forum, but I had this 12x9 stripboard offcut so I gave myself a challenge to fit as much as possible in there, including one of the potentiometers. I also didn’t have any 100ohm resistors, and the closest I found was a chunky 1w resistor. I figured that it’s only used to prevent short circuits at the op amp output, so I just soldered it directly to the output. Good enough for rock 'n roll I guess 😄 ![20231005_112310](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/8/0/80777571523bc5c1b549e2d22ef75a25ec75068e.jpeg) --- _[View the full topic](https://lookmumnocomputer.discourse.group/t/my-build-progress/345)._