brymen_bm869s_ir_cable

Brymen 869s Serial PC-Comm DIY Cable.
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README (496B)

      1 # Brymen 869s Serial cable
      2 
      3 BOM:
      4 
      5   * micro controller ATTiny85
      6   * One infrared diode.
      7   * One photodiode.
      8   * 3 resistors (75R 4k7 2k)
      9   * One NPN BJT (like the 2N2222A)
     10   * A usb to serial adapter that can provide 5v.
     11 
     12 I built it on a perfboard, so no pcb design is provided.
     13 
     14 The 3D desigh fits perfectly and leaves 48 x 11 mm (more or less) of
     15 space for the pcb. An STL file can be found at (in case you don't know
     16 how to use FreeCAD):
     17 
     18 https://e1e0.net/files/brymen_cable_attachemnt_v2.stl