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SEM attenuverter--FRAC format synthesizer module
Large Format synthesizer "attenuverter" based on a classic Oberheim design. Photo shows it in PAIA frac format, but any synth that provides +/-15V power will work.
Allows you to fine tune modulation control voltages: amplitude, phase (0 degrees, 180 degrees), and offset bias.
Github for latest build can be found here: https://github.com/cslammy/SEM_ATTENUVERTER
Github repo includes board layouts, eagle files, gerbers etc.
The project only includes the main PCB; no front panel.
For more information, please see the blog posts about this:
Improved buffers/current design as of 9-22-22
http://audiodiwhy.blogspot.com/2022/09/again-few-years-ago-i-designed-laid-out.html
Skiff build:
http://audiodiwhy.blogspot.com/2019/09/skiff-to-my-leiu-my-first-skiff.html
Initial design on perf:
http://audiodiwhy.blogspot.com/2019/08/attenuverter-part-i-prototyping-sem-way.html
SEM attenuverter--FRAC format synthesizer module
*PCBWay community is a shared platform and we are not responsible for any design issues.
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