MEP EP#224: The Normal Chaos

Stephen

• DC Heating and Thermal Testing
  • A low voltage moderate current linear power supply
  • 12.6V dc @ 0.55A 6.93W
  • LM2940T-12.0 LDO
  • TIP42 bootstrap transistor to share the load
  • 12V @ 2A transformer supplies ~16.2vdc with 200mV ripple
  • ~2W of heat to be handled
  • Shooting for about 250mW in the regulator and the transistor then the rest will get dumped in some resistors
  • PCB heatsinking
• Diptrace 4.0 is finally here!
  • Snapping and aligning items
  • Circles and arcs actually have a center now…
  • Paste and Mask layers are finally visible
  • Pad angles other than 0 and 90 are now available in the pattern editor
  • One button for removing silkscreen from pads
  • Progressive searching for components instead of the seizure it used to be
  • Export options now can export all the manufacturing files as a single zip
  • Teardrops!

Parker

• Wagoneer Engine Work
  • Timing cover
    • Water pump
    • Timing chain
    • Distributor gear
    • Distributor camshaft gear
    • Harmonic Balancer
    • All the gaskets
  • Radiator next
  • Dash Cluster
• Fixing a wine chiller