Labels Milestones
BackKS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on EPCOS.
- 6.88717 facet normal -8.613040e-01 -5.080899e-01 -0.000000e+00 facet.
- 7.811890e-001 4.276928e-001 facet normal 1.304262e-001 -2.235998e-001 9.659152e-001.
- 7.071116e-001 facet normal 0.0645475 0.533422 0.843383 vertex.