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DH Package; 16-Lead Plastic Small Outline Narrow Body (QR)-.150" Body [QSOP] (http://www.allegromicro.com/~/media/Files/Datasheets/ACS726-Datasheet.ashx?la=en Allegro Microsystems SIP-3, 1.27mm Pitch (http://www.allegromicro.com/~/media/Files/Datasheets/A1369-Datasheet.ashx Allegro Microsystems 12-Lead (10-Lead Populated) Quad Flat Pack, 3x3mm Body, 0.5mm Pitch (http://www.ti.com/lit/ds/symlink/lm4990.pdf WSON, 12 Pin (https://www.analog.com/media/en/technical-documentation/data-sheets/6957fb.pdf#page=36), generated with kicad-footprint-generator ipc_gullwing_generator.py eSIP-7C Vertical Flat Package with Heatsink Tab https://ac-dc.power.com/sites/default/files/product-docs/linkswitch-ph_family_datasheet.pdf SIP4 Footprint for Mini-Circuits case HF1139 (https://ww2.minicircuits.com/case_style/HF1139.pdf Footprint for Mini-Circuits case TT1224 (https://ww2.minicircuits.com/case_style/TT1224.pdf) following land-pattern PL-258, including GND-vias (https://ww2.minicircuits.com/pcb/98-pl035.pdf Footprint for Mini-Circuits case BK377 (https://ww2.minicircuits.com/case_style/BK276.pdf) according to the base panel's thickness to account for squishing width = 12; // overkill; currently three 3.5mm jacks needing 8mm //calculated x value of exact middle of slider panel (between steps 5 and 6); middle of panel after deducting left/right sub-panels // top horizontal rib h_wall(h=1.6, l=right_rib_x); // bottom horizontal rib // one more vertical to mount a circuit outside the full dev board (in some cases) Arduino + 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.

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