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Our friend Quinn Dunki has a benchtop power supply, but she wasn’t entirely satisfied with it. Quinn has needs. She made a list:

  • Quick on/off switch for the board, separate from the bench supply
  • Indicator light for when the breadboard is hot
  • Switchable between unregulated supply and regulated 5V
  • A place to patch in an ammeter for measuring the draw of the entire circuit
  • A bunch of reference ground pins for scopes, meters, etc.
  • Supply to both sides of the breadboard

She got to work and the “Juice Bridge” was born. See her site, Blondihacks, for the full details and schematics (and some discussion about improvements/additions).

Getting magic smoke into your breadboard with style

Gareth Branwyn

Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of a dozen books on technology, DIY, and geek culture, including the first book about the web (Mosaic Quick Tour) and the Absolute Beginner’s Guide to Building Robots. He is currently working on a best-of collection of his writing, called Borg Like Me.


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