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RD Build-Off Notes

Post-Build May 1, 2022

Electronics Enclosure

  • The arduino nano has to go. this thing keeps having problems. Either move to an embedded ESP for space, or a micro
  • The left (output) side output needs to be shifted about an inch outwards
  • The FETs need to be more stable. Active low needs to stick around thanks to the bars, but pulldowns and stuff should be prioritized
  • On top of the buck converter, voltage protection is a MUST on the arduino. Even if it's just a zener diode stopping the vin from passing a threshold
  • The threads need to be shrunk so that the arduino can stay down

Wiring Harness

  • 18awg is NOT enough for the main rail. move to at least 14
  • I need a mounted fuse block and preferably a distribution block for power
  • the lights and ignition should be fused separately, after the main fuse
  • the motogadget M unit is probably the way to stay, NFC will be stinky difficult, unless I wanna put time and ESP resources into it

May 2, 2022

What actually failed

  • As it turns out, logic-level MOSFETs do not have a very high VGS. As a reesult, I burned out the FET gate after extended exposure to 12V. Although VDS is 60V, we need to maintain a low VGS.
  • Somehow, an 18awg wire burned, drawing 2.5 amps.
  • The 18awg has been replaced by 12awg for the main battery wire
  • The motogadget will not stay on, even with no load on the system. It MAY need a backing capacitor

keith z