2 layers19 × 13 mm

Breakbeam receiver
SSL-A-Team/electrical
circuit board design files, gerbers, and circuit analysis
7 parts6MIT
Boards in 1 GitHub repository, designed in KiCad, that use the OP506B by OPTEK (-40℃~+100℃ 0.4V@250uA 100mW 100nA 20° 30V 5.95mA 935nm NPN - Phototransistors ROHS). See how each wires it, with its parts, size, README and files; the OP506B’s symbol, footprint and pinout are on its own page.

SSL-A-Team/electrical
circuit board design files, gerbers, and circuit analysis

SSL-A-Team/electrical
circuit board design files, gerbers, and circuit analysis

SSL-A-Team/electrical
circuit board design files, gerbers, and circuit analysis