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CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules f80e4975fb checkpoint before trying to implement chaining Add splits and labels to get below 200bpm - C1 is too small for a single 0.75 mm² wires, reinforced insulation, conductor diameter 0.65mm, outer diameter 3.6mm, size source Multi-Contact FLEXI-E 0.1 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Hirose DF13 through hole, common anode, https://docs.broadcom.com/docs/AV02-2553EN One digit 7 segment orange common anode Single digit 7 segement blue LED with left dot Overflow +- 1 red LED One digit 7 segment green, https://docs.broadcom.com/docs/AV02-2553EN One digit 7 segement blue LED with right hand decimal, https://docs.broadcom.com/docs/AV02-1589EN 2 Digit 7 segemnt blue LED, right hand decimal, https://docs.broadcom.com/docs/AV02-1589EN 2 Digit 7 segemnt blue LED, right hand decimal 10-Element Bar Graph Array 10-Element Red Yellow Green Bar Graph Array 10-Element Green Bar Graph Array https://docs.broadcom.com/docs/AV02-1798EN 10-Element Red Bar Graph Array 10-Element Yellow Bar Graph Array https://docs.broadcom.com/docs/AV02-1798EN 10-Element Bar Graph Array https://docs.broadcom.com/docs/AV02-1798EN 10-Element Yellow Bar Graph Array LCD 16x2 Alphanumeric 16pin 16 x 2 Character LCD LCD LM16255 16x2 character http://www.datasheetlib.com/datasheet/259542/lm16255_sharp-electronics.html 7-Segment Display, LTS67x0, http://optoelectronics.liteon.com/upload/download/DS30-2001-355/S6760jd.pdf 7Segment LED LTS6760 LTS6780 Single Digit 7-segment RGB LED NeoPixel, https://cdn-shop.adafruit.com/datasheets/WS2812B.pdf Wurth Common anode RGB LED, through hole, DF11-22DP-2DSA, 11 Pins (https://www.molex.com/pdm_docs/sd/026605050_sd.pdf), generated with kicad-footprint-generator JST SH series connector, 501331-1507 (http://www.molex.com/pdm_docs/sd/5013310207_sd.pdf), generated with kicad-footprint-generator JST XH series connector, (https://www.stocko-contact.com/downloads/steckverbindersystem-raster-2,5-mm.pdf#page=15), generated with kicad-footprint-generator JST PHD series connector, 53398-1571 (http://www.molex.com/pdm_docs/sd/533980271_sd.pdf), generated with kicad-footprint-generator JST SUR series connector, 504050-0791 (http://www.molex.com/pdm_docs/sd/5040500891_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-140-02-xx-DV-PE-LC, 40 Pins per row (http://www.molex.com/pdm_docs/sd/1053131208_sd.pdf), generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55932-0810, with PCB locator, 13 Pins per row (http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=82181_SOFTSHELL_HIGH_DENSITY&DocType=CS&DocLang=EN), generated with kicad-footprint-generator Soldered wire connection, for 5 times 2 mm² wire, basic insulation, conductor diameter 0.48mm, outer.

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