Optics

Archive for the ‘Optics’ Category

Belated 2012 Transit of Venus report

Sun projection with Venus shadow at 19:20:51 EST

Sun projection with Venus shadow at 19:20:51 EST

Although most of the posts you see on this blog are about electronics, hence the name: Elabz, I can’t resist the urge to post about of my other hobbies here. I haven’t done it before in all of the three year history of this blog but from this point onward my visitors are going to have to endure a non-electronics post every once in a while.

Astronomy is one of those not-yet-covered-here hobbies of mine and one of the rarest, easy to observe and just overall interesting astronomy events has just happened recently – the June 5, 2012 Transit of Venus. Since I had a camera handy, I had to snap some pictures and brag about it here :) It was the very first time I saw an image of the Sun projected through optics and it was a rather illuminating experience, pun totally intended. Read the rest of this entry »

Tools

Coming soon ...

Recent Comments
  • Christian Stöveken: A less dirty solution to count pole pairs is to connect a small battery (e.g. AAA) or a bench...
  • 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...
  • Nava Whiteford: I’ve found you can actually drive these steppers directly from an Arduino without a driver,...
  • CHAARI: need an eagle file for the control of a stepper motor with easy drive or a microstepping driver
  • admin: Awesome! Thank you very much for sharing, Dani!
  • Dani: Here is my version, not perfect but I learned a lot. http://youtu.be/yrOzLo7bk_E
  • Dani: Thanks for your reply! :)
  • Andreas Carmblad: Thanks for answer :) I use easydriver yes. The problem is solved though. I thought I was supposed...
Meta