HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
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.

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!

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.

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

armorris
User Rank
Platinum
No, it came from my own futile little mind
armorris   9/28/2011 10:42:12 PM
NO RATINGS

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.

BradLevy
User Rank
Iron
Correction
BradLevy   9/28/2011 3:50:28 PM
NO RATINGS
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.

laserdudephil
User Rank
Iron
Nice!
laserdudephil   9/28/2011 3:25:41 PM
NO RATINGS
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?



Partner Zone
Latest Analysis
McLaren is one of the biggest names in auto racing. But now it has its eyes on a whole new challenge -- innovating healthcare.
What if algae borne of fertilizer runoff that pollutes rivers and lakes could be harvested and used as biofuel feedstock? What if the leftovers could be recycled into farm soil nutrients, eliminating at least some of the need for artificial fertilizers in the first place? Western Michigan University researchers have a plan.
PTC will stream its LiveWrox IoT conference for free beginning Tuesday, May 5.
Manufacturers of plastic parts recognize the potential of conformal cooling to reduce molding cycle times. Problem is, conformal molds require additive manufacturing (AM), and technologies in that space are still evolving. Costs also can be high, and beyond that, many manufacturing organizations lack the knowledge and expertise needed to apply and incorporate additive technologies into their operations.
Stratasys has announced the winners in its 11th annual Extreme Redesign contest for middle school, high school, and college students around the world in engineering, design, and art or architecture.
More:Blogs|News
Design News Webinar Series
3/31/2015 11:00 a.m. California / 2:00 p.m. New York
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
5/7/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
May 4 - 8, Designing Low Power Systems using Battery and Energy Harvesting Energy Sources
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Last Archived Class
Sponsored by Proto Labs
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service