Power Distribution and Communications Board v1.3

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Revision as of 21:52, 28 August 2007 by ZachSmith (talk) (version migrated from twiki)
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Power and Communications Board v1.3

Note: development on Kicad boards should be done in the electronics/powercomms directory in subversion

Schematic

Changes (Done)

  • Add debug LED's to TTL Tx/Rx lines (nophead)
  • Add debug LED's to RS232 Tx/Rx lines (nophead)
  • Add extra capacitor to filter out high frequency noise as per data sheet (nophead)
  • Figure out bug with 78L05 and cvpcb failing. (Zach Smith)
  • Change power connector to 12v/G alternating connectors. (Zach Smith)
  • Swap 4700uF capacitor for two 2200uF capacitors (Simon McAuliffe)

PCB Layout

TODO List

  • Double check silkscreens
  • Make .100" holes slightly bigger

Finished

  • Move RS232 led's closer to control lines
  • Move tx/rx led's to each side of their respective connections.
  • Insert new capacitor near 5v regulator
  • give the .100 connectors a proper silkscreen for Tx/Rx as well as power.
  • Fastener holes: ensure clearance fit for 1/8" (3.125mm) diameter shank (Imperial equivalent of M3). Dia 3.5mm should do it.
  • Fastener washer space: ensure circuits avoid the radius of an M3 washer on the fastener holes (metal washers might short the circuit).
  • The C6/C8 capacitors are to spec as per the Mouser datasheet.
  • Move 1uf capacitor closer to MAX232

General TODO

  • Test LED modifications on v1.2.1 board with 'green wire' mods.

Technical Documentation

  • PowerComms 1.3.0 2007-08-19 schematic as JPG:
PowerCommsBoard 1 3-comms and power distribution-sch.jpg
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