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Https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on https://www.analog.com/media/en/technical-documentation/data-sheets/8063fa.pdf Altera BGA-36 V36 VBGA BGA-48 - pitch 0.8 mm Highspeed card edge connector for PCB's with 50 contacts (not polarized Highspeed card edge connector for PCB's with 08 contacts (not polarized Highspeed card edge connector for 1.6mm PCB's with 70 contacts (not polarized Highspeed card edge connector for IQRF TR-x2D(C)(T) modules, http://iqrf.org/weben/downloads.php?id=104 8 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 female-on-board top-entry thru-hole 18 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 female-on-board top-entry thru-hole 14 pin DIP socket A-001 1 14 pin DIP socket | | 2 | 1N5817 | Schottky Barrier Rectifier Diode, DO-41 D3, D4, D5, D6, D7, D8, D9, D10 | 8 | 1N4148 | 100V 0.15A standard switching diode, DO-35 Push button switch, generic, two pins | Dailywell | PAS7B3M1CESA6-5 | Tayda | A-159 | | | | | J3, J4, J5 | 3 create mode 100644 Schematics/Unseen Servant/Unseen Servant.kicad_sch | 1 | 3_pin_Molex_connector | 3 | 10 nF ## Erratum C13 is marked on.

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