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Introduction to LEDs and how to use LEDs

Posted: Tue Sep 18, 2012 8:28 pm
by techman
How to calculate LED resistors, how to string multiple LEDs together to make a LED light bulb. An LED resistor calculator which shows you which resistor you need for your particular LED. An LED color chart which shows you voltage, color and current. A free online MCD (millicandelas) to Lumens calculator. How to make your own LED light bulbs and more.

Check out this collection of projects and tools here:

http://www.thediyworld.com/DIY-LED-Ligh ... -Facts.php

Use this forum to post anything about LEDs.

Re: Introduction to LEDs and how to use LEDs

Posted: Thu Oct 04, 2012 2:00 pm
by tburnham316
Does your book on The Do It Yourself LED Light Bulb (120 Volt Sockets) give links of where to purchased the components to build ?
The links that currently are listed in your instructions take you to Jameco. To buy the components from Jameco for a 40 LED Light bulb the costs are $45 + socket adapter and
$61 + socket adapter for the 60 bulb LED. This seems a little expensive to me. In a 120V socket at this cost I don't see how I would ever recover the cost of this bulb verses a few CFL's.
Thanks for your response, I originally found you on YouTube and have enjoyed watching your videos.
Tom

Re: Introduction to LEDs and how to use LEDs

Posted: Thu Oct 04, 2012 6:10 pm
by techman
Ebay is the answer. I get most of my low priced parts online there. Browse around some and you can find some incredible deals.

Re: Introduction to LEDs and how to use LEDs

Posted: Thu Nov 15, 2012 1:43 pm
by robertlelliston
Do you have any more free books on the "how to" 120 volt led bulbs

Re: Introduction to LEDs and how to use LEDs

Posted: Tue Dec 11, 2012 12:08 pm
by techman
Sorry, that give away has long run out. Thanks for asking tho.

Re: Introduction to LEDs and how to use LEDs

Posted: Sat Nov 02, 2013 11:41 pm
by Jolsonwa
How do we get the discount on mrbeems products. We have really enjoyed watching your videos, hopefully we can help in someway in the future.

Re: Introduction to LEDs and how to use LEDs

Posted: Wed Nov 06, 2013 12:00 pm
by techman
Go to www.MrBeams.com and enter the code OFFGRIDCONTEST to get 40% off your next purchase of Mr Beams lights. This code is valid until Dec 31, 2013.

Re: Introduction to LEDs and how to use LEDs

Posted: Thu Nov 06, 2014 4:51 am
by sanimirza
I need help with an LED lamp. I want it to cycle through colors and white with a small button. I'm not good at math or science so I need help figuring out the watts and rechargeable battery power and a lot more. If you could message me we could talk through a private message. The lamp will cycle through red yellow green blue white

Re: Introduction to LEDs and how to use LEDs

Posted: Sat Dec 06, 2014 11:51 am
by techman
If you are still there, I would be happy to help out out here on the forum. Private messages are not working for me anymore due to receiving too many emails right now. I have over 1,000 emails to read.