All About Circuits Forum Super bright LED heat
 Register Blogs FAQ Members List Today's Posts Search Today's Posts Mark Forums Read

 The Projects Forum Working on an electronics project and would like some suggestions, help or critiques? If you would like to comment or assist others with their projects, this is the place to do it.

#11
09-17-2013, 08:37 AM
 #12 Senior Member Join Date: Dec 2010 Location: 15 miles west of Tampa, Florida Posts: 7,082 Blog Entries: 9

Let's get the basics down. Any part which is heated by a current will get hotter until the radiated heat comes into equilibrium with the generated heat. If it was perfectly insulated, the temperature would theoretically rise toward infinity. In practical terms, if you make a nice wad of fiberglass insulation for the part to be contained, you can get most anything to smoke or burst into flames.

So, how much heat does a 1 watt part make? One watt second per second. How hot will it get? It depends entirely on what it is surrounded with.

Metalmann gave us a clue about how hot an LED would get when surrounded by air. That is a good starting point. You just have to decide what to surround the LED with to get the temperature where you want it.
__________________
It's only my opinion, and sometimes I'm wrong.
(I learn something almost every day on this site.)
#12
09-19-2013, 11:06 PM
 trader007 Senior Member Join Date: Feb 2010 Posts: 144

#12 is correct. Take my custom troublelight as an example. The LED's are mounted to a steel pipe, which conducts heat fairly well. But with LED's, the heat sinks out the back, so the inside of the pipe warms up. That air in there just gets hotter and hotter. If you dont drill a couple holes in the bottom and top (convection cooling) the whole light will get too hot to touch after an hour or so, and the LEDs burn out eventually.

If you drill just two 1/4" holes in the bottom, and two in the top, its more then enough to keep the whole light cool. I mean it still gets warm, but you can put your cheek next to the top holes and feel the heat pouring out. It works incredibly well.

 Tags bright, heat, led, super

 Similar Threads Thread Thread Starter Forum Replies Last Post Zanac-X General Electronics Chat 8 09-09-2012 09:44 PM docb The Projects Forum 12 09-15-2010 03:06 AM MingJae Homework Help 20 02-25-2010 02:54 PM

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Electronics Forums     General Electronics Chat     The Projects Forum     Homework Help     Electronics Resources Software, Microcomputing, and Communications Forums     Programmer's Corner     Embedded Systems and Microcontrollers     Computing and Networks     Radio and Communications Circuits and Projects     The Completed Projects Collection Abstract Forums     Math     Physics     General Science All About Circuits Commmunity Forums     Off-Topic     The Flea Market     Feedback and Suggestions

All times are GMT. The time now is 10:28 PM.