All related build items and informations are here:
http://ebolatone.blogspot.com/2014/02/buchla-110-quad-gate-diy-build.html
This is an untested edit of the Quad 110 artwork, cut down to possibly work in Eurack format. I don't have art for a Euro power header. This build only uses +15V and ground, the large pads at the edge of the board...remember that this expects +15V CV to fully open, and is happiest with about 2V audio signals, and will output at that level as well, requiring a make-up circuit for the outputs. You should be able to use the input attenuators to set Euro signal levels to where this circuit is happy.
I'm told by a builder that this circuit works just fine with 12V supplies!
Replace R8, 68K, at the CV Input pad, with a 33K or so to use with 200e and later 200 system modules and clones which output 10V CV signals.
NOTE THAT FOR THIS ARTWORK, THE ERROR IN POWER CAPACITOR (100uF DIRECTLY NEXT TO THE SOLE 10R RESISTOR) POLARIZATION HAS BEEN CORRECTED. STUFF THAT PART PER THE "+" INDICATOR ON THE PCB ARTWORK. THE "+" INDICATOR SHOULD ALWAYS LEAD TO THE "+" POWER RAIL, NEGATIVE CAPACITOR LEAD TO THE GROUND RAIL.
Click here for PDF artwork from which to etch.
Ugh, don't know where those random dots came from. I haven't etched from this, it's untested, but if the dots don't cause bridging, this should work. Must be bitmap vs. grayscale.
Remember to set all trimpots to 500r before soldering them in; it will save you a great deal of time in the calibration procedure.
http://ebolatone.blogspot.com/2014/02/buchla-110-quad-gate-diy-build.html
This is an untested edit of the Quad 110 artwork, cut down to possibly work in Eurack format. I don't have art for a Euro power header. This build only uses +15V and ground, the large pads at the edge of the board...remember that this expects +15V CV to fully open, and is happiest with about 2V audio signals, and will output at that level as well, requiring a make-up circuit for the outputs. You should be able to use the input attenuators to set Euro signal levels to where this circuit is happy.
I'm told by a builder that this circuit works just fine with 12V supplies!
Replace R8, 68K, at the CV Input pad, with a 33K or so to use with 200e and later 200 system modules and clones which output 10V CV signals.
NOTE THAT FOR THIS ARTWORK, THE ERROR IN POWER CAPACITOR (100uF DIRECTLY NEXT TO THE SOLE 10R RESISTOR) POLARIZATION HAS BEEN CORRECTED. STUFF THAT PART PER THE "+" INDICATOR ON THE PCB ARTWORK. THE "+" INDICATOR SHOULD ALWAYS LEAD TO THE "+" POWER RAIL, NEGATIVE CAPACITOR LEAD TO THE GROUND RAIL.
Click here for PDF artwork from which to etch.
Ugh, don't know where those random dots came from. I haven't etched from this, it's untested, but if the dots don't cause bridging, this should work. Must be bitmap vs. grayscale.
Remember to set all trimpots to 500r before soldering them in; it will save you a great deal of time in the calibration procedure.
