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 Photo 229 229948-Gadget Freak Case 154 Table Saw Quick Clean Up
Latest Gadget Freak! Table Saw quick cleanup, simple Hall effect sensor project -

When John Dawson turns on his table saw he wants a Shop-Vac to automatically turn on, too. He might have controlled a duplex outlet from a wall switch, but where’s the fun in that? Instead, he uses a Hall-Effect sensor to detect current flow in the saw’s power cord and then turn on the vacuum cleaner via a relay. John’s design adapts well to other control situations, too. Don’t get sucked into a simple switch circuit.

Phillip Torrone

Editor at large – Make magazine. Creative director – Adafruit Industries, contributing editor – Popular Science. Previously: Founded – Hack-a-Day, how-to editor – Engadget, Director of product development – Fallon Worldwide, Technology Director – Braincraft.


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Comments

  1. spiwrx says:

    We’ve been using a current switch for purposes like this, quick, easy, and cheap…

    http://www.hankselectric.net/detail.aspx?ID=6368

    Or Search ‘current switch’ on this site, hankselectric.net

  2. Clint says:

    Sears is the only place I’ve found that sells a pre-made saw-accessory switch. It works perfect for my needs and the $20 price is hard to beat.

    http://www.sears.com/shc/s/p_10153_12605_00924031000P

    My only complaint is that I’d like a manual ON switch for the accessory sockets so I can turn the vacuum on occasionally without having to power up the saw itself.

    At some point, I’ll post my disassembly photos of it somewhere.