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laserdudephil
User Rank
Iron
Nice!
laserdudephil   9/28/2011 3:25:41 PM
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Thanks Rob,

    I use a similar circuit to turn on a shopvac whenever any woodworking tools are turned on for dust collection.  It was built from an 30 year old Radio or Popular or Elementary Electronics magazine article (was that yours?.)  Is that a Klipsch in the background?

BradLevy
User Rank
Iron
Correction
BradLevy   9/28/2011 3:50:28 PM
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It would indeed be very unique if it actually used a "Selective Catalytic Reduction" voltage regulator. With better editing, I think the article would have stated more correctly that it uses a Silicon Controlled Rectifier voltage regulator.

armorris
User Rank
Platinum
No, it came from my own futile little mind
armorris   9/28/2011 10:42:12 PM
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No, I created the original version of this gadget back in 1973 entirely on my own. The updated version is also entirely my work. Up until I saw a Sears unit for power tools in 2003, I had never seen or heard of such a thing before. I have already emailed the editor about the SCR mistake. I don't know where he got that from. I took for granted that everyone who would be interested in building the gadget would know what an SCR was.

RoboKaren
User Rank
Silver
Looks great!
RoboKaren   9/29/2011 9:24:12 AM
NO RATINGS
Looks like a very nice design! I was going to make my own using a hall effect sensor, a PICAXE micro, and a relay. The use of a MPU gives a bit more flexibility in programming the  current sensing sensitivity and delayable on-off period. 

Karen

Jluminais
User Rank
Silver
Re: No, it came from my own futile little mind
Jluminais   9/29/2011 10:08:10 AM
NO RATINGS
If you google SCR, the term Selective Catalytic Reduction occurs right after the Wikipedia article on Silicon Controlled Rectifier.  I suppose the term Selective Catalytic Reduction sounded cooler.

Jason
User Rank
Gold
Re: Looks great!
Jason   9/29/2011 5:10:01 PM
NO RATINGS
If you do decide to create this using the PICAXE, please share the design with the rest of us!

Tim
User Rank
Platinum
Great design
Tim   9/29/2011 7:10:29 PM
NO RATINGS
This a great compact design.  It is great to apply your work career into your home life.  Good job.



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