Posted on August 15th, 2010 22 comments
A follow on from some of the recent blogs that have involved basic thermal heatsink calculation. This time around Dave takes you though the basic theory of thermal design and how heatsink calculations work. Then there are some real world temperature measurements to see how close to the theory we get.
How do you read a heatsink thermal response graph? What is emissivity? It’s all here in thermal design 101.
Posted on August 1st, 2010 65 comments
Dave grabs a few junkbox parts and builds a useful constant current load for switch mode power supply, battery testing, and other applications.
Posted on July 5th, 2010 52 comments
Microsoft’s new Instaload battery technology allows batteries to be inserted into a product either way around.
Is it one of those brilliant “why didn’t anyone think of that before” moments, or just another silly patent on a really obvious idea?
Is it workable in practice?
Can YOU bust the patent by finding prior art before 2006?
See the Microsoft Patent here:
OR DOWNLOAD THE FULL PDF PATENT HERE: http://www.eevblog.com/files/Microsoft%20Instaload%20Patent%20US7527893.pdf
You can get Dave’s T-Shirt here:
Posted on January 31st, 2010 23 comments
Look, up in the sky, is it a hardware fault?, is it a software fault?, no, it’s a bloody FPGA
Posted on January 7th, 2010 42 comments
Dave tangles with Murphy’s Law and Microchip silicon bugs with his latest PIC project.
The PIC24FJ256 errata
And that Jim’s Mowing Franchise looks pretty tempting.