HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Gadget Freak

Gadget Freak Case #226: Speed Regulator for Rotary Tool

View Comments: Oldest First|Newest First|Threaded View
<<  <  Page 3/5  >  >>
Nancy Golden
User Rank
Platinum
Re: Handy project!
Nancy Golden   9/21/2012 11:26:24 AM
NO RATINGS
What a cool looking kit, mrdon - that looks like a lot of fun. Thanks for the link, it makes me want to start playing with my PIC stuff again. Another thing I love about using Microchip products is the technical support that is available, their extensive documentation of their PICs, and their forum community. I have gotten some excellent help when I was stumped on a project that I was contracted to do and wound up making a great friend and partnering on the project with him that (speaking of patents) was eventually patented by the company we wrote the code for.

armorris
User Rank
Platinum
Re: Monitoring back EMF?
armorris   9/21/2012 12:03:05 PM
NO RATINGS
Yes, it measures the back EMF after momentarily disconnecting the motor. This scheme would not work with a universal motor. You need to use IR compensation for that kind of motor. The analog version of this gadget, referenced in the article, uses IR compensation. A scaled-up version of that circuit would work fine with a universal motor, like the Dremel Moto-tool.

Also, why do you need to have extremely high speed for working on hearing aids. A Dremel moto-tool runs extremely fast without boosting the voltage. I'm afraid to do delicate work at high speed. Do you know something I don't? High speed would melt plastic parts.

armorris
User Rank
Platinum
Re: Handy project!
armorris   9/21/2012 12:09:00 PM
NO RATINGS
The PICLIST forum has gotten so huge now, that I find it almost impossible to find whatever help I need. It was a big help to me years ago, when I was first learning about PICs.

 

Nancy Golden
User Rank
Platinum
Re: Handy project!
Nancy Golden   9/21/2012 12:16:28 PM
NO RATINGS
Sorry to hear that armorris - that has not been my experience. I am not saying you did this, but what I did find is that there is little patience on the forum for questions that are just thrown out there without evidence of the person trying to solve the problem themselves first. I did notice that when I went into detail as to what I had already tried and where I was stuck with code examples - plenty of folks jumped in with some great suggestions. There are also different areas that help localize where you should post to get the best chance of receiving knowledgeable help. You might want to give it another try - or maybe jump on it to help someone else out ;)

armorris
User Rank
Platinum
Re: Handy project!
armorris   9/21/2012 12:27:48 PM
NO RATINGS
Thanks, Nancy. I'll take your advice next time I need help. When I needed help, I didn't actually ask for it. I tried to find the answer from comments that were already posted, but the archive is just so huge, and I do not know how to sort through them in any useful way.

I saw plenty of people willing to give advice for a fee.

Nancy Golden
User Rank
Platinum
Re: Handy project!
Nancy Golden   9/21/2012 12:37:22 PM
NO RATINGS
For a fee????  Times have changed...but I am willing to bet there are still plenty of folks who love what they are doing and love sharing their knowledge with others. I needed some help with my last project and had four different people offering very intelligent suggestions that helped me resolve the issue I was having - and they never asked for compensation.

Rob Spiegel
User Rank
Blogger
Re: Handy project!
Rob Spiegel   9/21/2012 12:50:05 PM
NO RATINGS
Andy, the small changes you describe to get around patents doesn't seem to work in the world of smartphones. There is a great number of patent suits in that world. Some of the suits are quite successful at banning companies from selling their products in a number of countries.

armorris
User Rank
Platinum
Re: Handy project!
armorris   9/21/2012 12:59:16 PM
NO RATINGS
Yes, Rob. You're absolutely right, but the patent work I did was almost 10 years ago. Also, far more money is involved in the smartphone business.

Rob Spiegel
User Rank
Blogger
Re: Handy project!
Rob Spiegel   9/21/2012 1:00:21 PM
NO RATINGS
That makes sense, Nancy. And chances are, you'll never run into trouble. And if someone wants it -- as has been pointed out in these comments -- that person can make a small change. 

mrdon
User Rank
Gold
Re: Handy project!
mrdon   9/21/2012 2:01:15 PM
NO RATINGS
Hi Nancy, Your quite welcome. I agree, Microchip does have awesome documentation and their forums provide a wealth of technical support and solutions  to some tricky design application problems.

<<  <  Page 3/5  >  >>
Partner Zone
More Blogs from Gadget Freak
The Arduino is great for connecting with hardware but has a limited user interface. Apple’s iOS devices have a great user interface but are limited when connecting with hardware.
The Window Watcher stops the burglar before he does damage or enters the house. House alarm service companies set off alarms and call the service only after the burglar has damaged and entered the house.
The DDV-IP is a two-wheeled self-balancing robot that can deliver cold beverages to thirsty folks on hot summer days. A wireless RF remote enables manual control of the device beyond the act of self-balancing. All of the features of the DDV-IP result in an effective delivery vehicle while providing entertainment to the user.
Design News and Allied Electronics have raised the stakes for our second-annual Gadget Freak of the Year contest. The top three gadgeteers will be awarded a total of $10,000. Don't delay, enter today!
Adam Berger hacked a computer keyboard into a mini key-tar to play with his band.
Design News Webinar Series
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 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.
Nov 3 - 7, Engineering Principles behind Advanced User Interface Technologies
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


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 Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service