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BackBoard with shipping for 128.5mm x 100mm, from pcbshopper Lion - India; $11.53 per board with shipping for 128.5mm x 100mm, from pcbshopper JLCPCB - China, included for reference. $33.20/board from pcbshopper estimate on 02/06/2025 Digikey RED - worth looking into, mixed reviews Delete Page Deleting the wiki page "Future Module Ideas" cannot be undone. Continue? Fdd5744d78 Checkpoint after converting most things to SMD Checkpoint after tweaking footprints some more, starting over at 14hp Added hard sync to schematic, laid out PCB with 2 copper strips SMD Solder Jumper, 1x1.5mm rounded Pads, 0.3mm gap, open, labeled with numbers SMD Solder 3-pad Jumper, 1x1.5mm Triangular Pads, 0.3mm gap, open, labeled with numbers LUMILEDS LUXEON TX L1T2 LED LED 1W 3W 5W LED SMD 0402 (1005 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size source: https://www.vishay.com/docs/20052/crcw0201e3.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py DFN6 3*3 MM, 0.95 PITCH; http://www.ti.com/lit/ds/symlink/lmr62421.pdf 8-Lead Plastic DFN (5.55mm x 5.2mm), Pin 5-8 connected to trigger, gate jack is normalized\nto +12 V, 10 mA -12 V ## Photos ### Photos ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: make power connection traces larger; MK uses .6mm -- this is actually a pushbutton momentary, but roughly same dimensions as toggle switch ON-ON Push button switch OFF-(ON CMOS General Purpose Timer, 555 compatible, PDIP-8"/>