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DAC https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer 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 the footprint. Some options: Bourns PTL series, such as: Update README.md 40588ba725f2f6c7240cc5d95c2a8af539e27e15 Update README.md 8fe829edc2a52299443ce1d2193e2aa04d060c17 From b22080a808f5ee5eddd0b607f432f7fa2c4fb139 Mon Sep 17 00:00:00 2001 Subject: [PATCH 13/18] Add footprint items for panel holes; separate panel and Pin 1, steel retention lug, horizontal PCB mount, https://www.neutrik.com/en/product/ncj6fi-h-0 Combo I series, 3 pole female XLR receptacle, grounding: mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc3fahr2 A Series, 5 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc3mafh-ph A Series, 5 pole male XLR receptacle, grounding: mating connector shell and front panel, vertical PCB mount, color coding possible, https://www.neutrik.com/en/product/nc5fav-sw A Series, 4 pole chassis connector, nickel metal square G-size flange, self tapping screw holes (A-screw), horizontal PCB mount, https://www.neutrik.com/en/product/nc5mah A Series, 4 pole chassis connector, black D-size flange, mirrored self tapping screw holes (A-screw), horizontal PCB mount, additional ground contacts, https://www.neutrik.com/en/product/nc3fbh1-e B Series, 3 pole male XLR receptacle, grounding: separate ground contact to mating connector shell to pin1 and front panel, vertical PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc5mbh-b B Series, 5 pole female XLR receptacle, grounding: without ground/shell contact, horizontal PCB mount, replaces NL8MD-V-1, https://www.neutrik.com/en/product/nl8mdxx-v-3 speakON Chassis Connectors, 4 pole chassis connector, nickel metal square G-size flange, self tapping screw holes (A-screw), vertical PCB mount, asymmetric push, https://www.neutrik.com/en/product/ncj6fa-v-da Combo A series, 3 pole female XLR receptacle, switching contacts, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nl4md-h-3 speakON Chassis Connectors, 2 pole chassis connector, black D-size flange, mirrored self tapping screw holes (A-screw), vertical PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc5fah-da A Series, 5 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc3faav2 AA Series, 3 pole male XLR receptacle, grounding: separate ground contact.

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