HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Gadget Freak
Gadget Freak Case #230: The Inexpensive Dimmable LED Desk Lamp
11/30/2012

Image 1 of 2      Next >

Andrew Morris designed a dimmable LED driver circuit that is simple and energy efficient. He then installed the circuit into a portable fluorescent lamp.
Andrew Morris designed a dimmable LED driver circuit that is simple and energy efficient. He then installed
the circuit into a portable fluorescent lamp.

Image 1 of 2      Next >

Return to Article

View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 6/6
armorris
User Rank
Platinum
You could create your own lamp.
armorris   11/30/2012 8:30:04 AM
NO RATINGS

You could use my circuit to create your own custom LED lamp. You could make a beautiful LED desk lamp out of wood. My father was a skilled furniture maker, who went into electronics when his employer moved to an assembly-line manufacturing style. When he got engaged to my mother, he had no money for a diamond engagement ring, so he made her a small, but very beautiful wooden table lamp. That lamp was far more precious to her than any diamond ring could have been. One of my sisters has the lamp now.

 

armorris
User Rank
Platinum
It's economical too.
armorris   11/30/2012 8:27:46 AM
NO RATINGS

The original 9-watt fluorescent tube in the lamp costs about $5 and lasts about a year with heavy use. I spent $21 on the LEDs I installed in the lamp and they should last for many years of heavy use. The remaining parts cost about $10, not including the lamp itself. The 72 LEDs produce plenty of light for reading. The lamp does not light up the whole room like the fluorescent version did, but it brilliantly illuminates whatever it's aimed at. At its focal-point it's a lot brighter than the 14-watt fluorescent lamp (with a new tube in it) that I had been using for reading. The color is better, too. Now, I'll just use my fluorescent lamps for area lighting.

armorris
User Rank
Platinum
It's just what I need.
armorris   11/30/2012 8:18:18 AM
NO RATINGS

My new LED desk lamp is just what I need. I set it on a table beside my easy-chair. It produces a natural white light, like daylight. The light from the LED array is very focused, like a big flashlight. BTW, you should use LEDs with a viewing angle of 30 degrees or wider. The dimmer greatly enhances the lamp's utility. I can turn the brightness up for easy reading, or I can dim it down to the point where it perfectly illuminates my laptop keyboard, without the hassles of my USB light. Turned all the way down, the lamp produces enough light to illuminate my TV remote while not affecting the view of my TV. I also use it as a nightlight. I also use the lamp as a work light, because it can be folded or rotated to illuminate my work surface, without being in my way. The lamp is very portable and is much lighter than it was, having lost its heavy ballast coil and glass tube.

<<  <  Page 6/6
Partner Zone
More Blogs from Gadget Freak
Adam Berger hacked a computer keyboard into a mini key-tar to play with his band.
Dick Bipes couldn't find a boat lift remote with the specs he wanted, so he created his own for automatic operation.
This Gadget Freak Review looks at a keyless Bluetooth padlock that works with your smartphone, along with a system that tracks your sleep behavior and wakes you at the perfect time in your sleep cycle to avoid morning grogginess.
Colorado State University students have created “One Shot Two Shot, Red Shot Blue Shot” -- a Dr. Seuss themed target game where the objective is to get the most points with six shots from the gun.
This solar charge controller, which is placed between a solar panel and a battery, regulates the voltage and current coming from your solar panel. It is used to maintain proper charging voltage on the batteries.
Design News Webinar Series
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
7/17/2014 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.
Oct 20 - 24, How to Design & Build an Embedded Web Server: An Embedded TCP/IP Tutorial
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.
Next Class: October 1 - 30
Sponsored by Gates Corporation
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