Power Distribution and Communications Board v1.3

Power and Communications Board v1.3

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

Schematic

TODO

• Change power connector to 12v/G alternating connectors.

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.

PCB Layout

TODO List

• Insert new capacitor near 5v regulator
• Move 100uf capacitor closer to MAX232
• Move RS232 led's closer to control lines
• Move tx/rx led's to each side of their respective connections.
• Make .100" holes slightly bigger
• The holes for the C6 capacitor are slightly too close together so the legs have to be bent to fit into the holes and so it isn't seated flush with the board (or in my case even level).

Finished

• 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).

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:
  

• [[File:PowerCommsBoard 1 3-comms and power distribution-sch.pdf: PowerComms 1.3.0 2007-08-19 schematic as PDF|thumb]]