Alex writes – “Here’s the schematic, it works as a voltage converter to draw just 20mA from a 1.5V cell to light that white LED. The term ‘Joule Thief’ is used because the circuit will work from a cell which would otherwise be considered spent. I found that if the batteries in my Gamecube Wavebird […]
Trammell writes – “I bought one of the Sony eBook readers and wanted a way to read my blogs and other documents offline. So I wrote a tool using a variety of Perl modules to transform RSS feeds into LaTeX and a style sheet to make it formatted for the small screen.” – Link. Related: […]
Westfw writes – “It used to be that the number of different microcontroller chips available to the hobbyist was pretty limited. You got to use whatever you could manage to buy from the mail-order chip dealer, and that narrowed down the choice to a small number of chips. But times have changed. Digikey lists over […]
We completely agree with Maxim/Dallas semiconductor… “Disposable metal candy boxes, such as those from Altoids, make excellent shielded enclosures for lab tests. Engineers put extensive effort into designing and constructing lab test circuits which often are left in a drawer, undocumented and vulnerable to damage. The next time the same function is required, either the […]
Eecue got a tour of the Triforium control center in LA – “…Even now the Triforium has been drawing praise and scorn, most recently from the City Attorney’s office which has been claiming that the music is disturbing them and has requested it only play from 11am to 1pm, which completely defeats the purpose of […]
This looks like it might be interesting to (re)make, from “How To Build It 1932”- “HERE is a combination water and weight clock that anyone reasonably adept with a soldering iron can construct. It makes a novel addition to the den and generally draws the interest of persons unfamiliar with the principle on which it […]
EnglishRussia writes – “A guy from Ukraine, Alexandr Pashkevich, has made a model of Eiffel Tower from matches. The height of the structure is 3,3 ft (1 meter) and it consits of 15 000 different details made from 7464 matches. More than that there is a illumination in the tower, made of numerous LEDs.” [via] […]
