Circuit Break - A MacroFab Podcast

MEP EP#237: Ice Cream Solder Paste Equipotential

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MEP EP#237: Ice Cream Solder Paste Equipotential

Parker

  • Cat Feeder Unreminder
    • Started designing the parts and symbols in Eagle.
    • Will post more on twitter as I build the components and put together the symbols
    • Garage Door opener hacking
      • Converting my normal style garage door opener to a “jackshaft” style opener
      • Why?
      • LiftMaster, Chamberlain, Craftsmen are all the same
      • Mine is a Liftmaster Formula 1
        • Belt drive need to convert to chain drive to attach to the jackshaft
        • All of these use similar drive mechs
        • Other things that are needed
          • Garage door auto lock
            • SureLock Garage Door DeadBolt
            • Cable tension switch
              • LiftMaster 41A6104

                • Stephen

                • High voltage low current measurement
                  • Resistive dividers?
                    • Caddock 1776-C681
                    • 10M ohm
                    • 0.1% tolerance with 0.05% matching
                    • Low PPM
                    • This method is ok but requires a rather large current sense resistor which is not great.
                    • Floating supplies
                      • This is how multimeters work. The reference is floating.
                      • Isolation solution
                        • May go with an isolated solution - basically a power supply that isolates the secondary.
                        • Isolated digital communication down to LV side.
                        • Tests for pcb shielding
                          • Did a shield plane test on a new pcb assembly.
                          • Top and bottom pours that respect clearance rules.
                          • 5mm pitch via stitching.
                          • All terminate to one pin on a 2 pin header.
                            • Second pin connects to a plated bolt hole that goes to chassis.
                              • ...more
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                              Circuit Break - A MacroFab PodcastBy MacroFab, Inc.
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