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To online 8-note schematic, or extend MK's 5-note sequencer. Compare to online 8-note schematic, or extend MK's 5-note to 8-note. Expanding out to 8 notes means ~$16-20 in parts, two tl074 op amps and otherwise a bunch of wires backwards Fix getting a bunch of wires backwards e6b834b08c Fix floating pin for op amp 54f1a61ba5 gets jiggy with PCB cutout, light-direction downwards, see http://www.everlight.com/file/ProductFile/ITR8307.pdf refective opto couple photo coupler IR Receiver Vishay TSOP-xxxx MINIMOLD IR Receiver Vishay TSOP-xxxx, MINICAST package, see https://www.vishay.com/docs/82669/tsop32s40f.pdf IR Receiver Vishay TSOP-xxxx MINICAST IR Receiver Vishay TSOP-xxxx, MINICAST package, see https://www.vishay.com/docs/82669/tsop32s40f.pdf IR Receiver Vishay TSOP-xxxx MINICAST IR Receiver Vishay TSOP-xxxx MINIMOLD IR Receiver Vishay TSOP-xxxx, MINIMOLD package, see https://www.vishay.com/docs/82669/tsop32s40f.pdf IR Receiver Vishay TSOP-xxxx MINICAST IR Receiver Vishay TSOP-xxxx, CAST package, see https://www.vishay.com/docs/82493/tsop311.pdf package for Omron G6H-2F relais, see http://cdn-reichelt.de/documents/datenblatt/C300/G6H%23OMR.pdf Omron G6K-2F relay package http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6k.pdf Omron G6K-2G relay package http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6k.pdf Omron G6K-2F-Y relay package http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6k.pdf Omron G6K-2G relay package http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6k.pdf Omron G6K-2G-Y relay package http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6k.pdf Relay Omron G6SK-2G, see http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6s.pdf Relay Omron G6S-2G, see http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6s.pdf Relay Omron G6S-2F, see http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6s.pdf Panasonic Relay SPST, https://www3.panasonic.biz/ac/e_download/control/relay/power/catalog/mech_eng_lfg.pdf Bourns rotary encoder, PEC09, with switch, vertical shaft, http://www.alps.com/prod/info/E/HTML/Encoder/Incremental/EC11/EC11E15204A3.html Alps rotary encoder, PEC12R, with switch, vertical shaft, mounting holes 63.5mm, distance of mounting holes 33.3mm, distance of mounting holes 33.3mm, distance of mounting holes 47.1mm, distance of mounting holes to PCB edge 9.12mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 26-pin D-Sub connector straight vertical THT female pitch 2.77x2.84mm mounting holes 25mm, distance of mounting holes to PCB edge 11.32mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.77x2.84mm, distance of mounting holes 33.3mm, distance of mounting holes to PCB edge 7.4799999999999995mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 62-pin D-Sub connector horizontal angled 90deg THT female pitch 2.77x2.84mm pin-PCB-offset 7.699999999999999mm mounting-holes-distance 25mm mounting-hole-offset 25mm 9-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.77x2.84mm, pin-PCB-offset 7.699999999999999mm, distance of mounting holes 33.3mm, distance of mounting holes 47.1mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 9-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.29x1.98mm, pin-PCB-offset 3.0300000000000002mm, distance of mounting holes distance 63.5mm 37-pin D-Sub connector horizontal angled 90deg THT male pitch 2.77x2.84mm pin-PCB-offset 4.9399999999999995mm mounting-holes-distance 25mm mounting-hole-offset 25mm 9-pin D-Sub connector.

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