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Notes.txt Notes from MK's PCB livestream - avoid non-circular holes in footprints whenever possible; some fabs charge more for ovals avoid non-circular holes in footprints whenever possible; some fabs charge more for ovals avoid non-circular holes in footprints whenever possible; some fabs charge more for ovals - make power connection traces larger; MK uses a 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 getting really weird with WireIt Schematics/Unseen Servant/Unseen Servant.kicad_prl | 2 | 1N5817 | Schottky diode | | | L1 | 1 | TL074 | Quad operational amplifier, DIP-14 A-1135 2 8 pin DIP socket A-001 1 14 pin connector, https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F215079%7FY1%7Fpdf%7FEnglish%7FENG_CD_215079_Y1.pdf%7F215079-4 connector TE-Connectivity Micro-MaTch Vertical 1-215079-8 8-215079-18 TE-Connectivity Micro-MaTch female-on-board top-entry thru-hole 12 pin 3-pin CPU fan Through hole straight pin header, 2x10, 2.00mm pitch, 6.35mm socket length, single row style2 pin1 right Through hole angled pin header THT 2x15 1.27mm double row Through hole straight socket strip, 2x09, 2.54mm pitch, 6mm pin length, double cols (from Kicad 4.0.7), script generated Through hole pin header SMD 1x15 2.00mm single row Through hole straight socket strip, 2x25, 1.27mm pitch, double rows Through hole straight socket strip, 2x22, 2.54mm pitch, double cols (from Kicad 4.0.7), script generated Through hole pin header THT 2x20 2.00mm double row Through hole socket.

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