MS20-VCF clone based on BartonSynth version.
2 filters in one with a possibility to bridge them and get a band pass filter.
When using the band pass mode, signal IN on filter 1 and out on filter 2.
cutoff + resonance, with a switch to chose low pass or high pass mode.
CV control on the filter cutoff.
Self oscilation if resonance pushed to maximum, can be adjusted with 2 trimmers :
You'll find only the first filter below, the second filter is exactly the same.
You have a bom in excel format available in the bom folder.
Uses an SMD LM13700 because the DIP ones are not produced anymore, hence more expensive.
Regular build, I use ceramic capacitors but you can use film/polyester.
:warning: When building modules, always do it in this order (from smallest component to highest):
To solder the headers, place them and place both PCBs in their final position before fully soldering the pin headers/sockets.
For the next parts, always place them without soldering them on:
Once placed, put the front panel in place, then fasten all components to it. Once this is done, you can solder all the remaining components.