van de graaff

Posts Tagged ‘van de graaff’

$2 Van de Graaff Generator

Van de Graaff generator from found parts and a $2 M&M'S candy tin

Van de Graaff generator from found parts and a $2 M&M’S candy tin

When I was a little boy I was fascinated with static electricity and played a lot with sparks and attracting little pieces of paper to a plastic comb brushed through my hair. The comb was later replaced by an ebonite rod, also brushed through my hair, which my mother, a school physics teacher, brought home. It was great fun but brushing one’s hair gets old quick and, perhaps more importantly, some 30 years later it’s become crystal clear to me that human hair won’t always be so readily available for my static electricity experiments. Unless someone else volunteers theirs. And so it has become obvious: I needed to break my dependence on human hair as the source of high voltage energy! :)

Robert Jemison Van de Graaff to the rescue! His ingenious generator, developed in 1929, appeared to be a perfect replacement of the hair/comb generation technology, and it looks super cool doing it, too, with its tall column and a shiny metal sphere at the top! So, finally, some 30 years after I first read about Van de Graaff, I decided to take action and here is what came out … Read the rest of this entry »

Tools

Coming soon ...

Recent Comments
  • Dokta: I placed the ‘boards.txt’ and the unzipped core (smeezekitty’s) into...
  • JBG: I made a (small) mistake in my previous reply, you could delete lines 107 to 109, not 105 to 111. The rest...
  • JBG: Really good work. I was working on solving this problem this afternoon but as humans mostly are, trying a far...
  • admin: Well, sure: http://elabz.com/brushless-dc- bldc-motor-with-arduino-part-3 -the-stroboscope-project/ you will...
  • gauri: will you please provide code to drive BLDC motor in arduino ?
  • Christian Stöveken: A less dirty solution to count pole pairs is to connect a small battery (e.g. AAA) or a bench...
  • Eric: Hi there. Great tutorial and overview. If I’m not mistaken however, your LEVELS truth table is organized...
  • Lego: Consider using the analog pins as these “have symmetrical drive characteristics with both high sink and...
  • Kim: Nava, You could PWM the high pins at ~10KHz 40% duty cycle to reduce your current. 5V @ 40 Ohms will consume...
  • Martin A: I am not a programmer but I was wondering if this example be run off one button instead of two? And if it...
Meta