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ATtiny13 12-LED blinker with motion detection and scripted blinks



I can hear you screaming:”Not another LED blinker!” and yet here it is, packaged into yet another transparent Ferrero Rocher chocolate box, just like the first one. Why another ATtiny13 LED project? I needed to change the software to add a new feature and I had another box stashed away after Christmas – that alone should have been a reason enough :) Additionally, I have to admit right here that there will likely be one more post that includes an ATtiny13, LEDs and chocolates before I let it go (soon, I promise) and move onto more serious things, such as the DVD-CNC project that’s been languishing on and off my workbench for more than a year now.

That said, if you are still interested in programming ATtiny13 with the Arduino IDE to blink 12 Charlieplexed LEDs, respond to motion (shaking) and have the LED on/off sequence scripted in an orderly fashion rather than random or simply 1 through 12, then read on! Read the rest of this entry »

$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 »

Pimp Your Chocolates with Arduino IDE and ATTiny13

Way too late for the Valentine’s Day yet maybe just in time for the Mother’s Day this year, I’d like to introduce an electronics project that came about as a result of my reluctance to throw away a nice looking empty box. This year Valentine’s Day came around just about the time I was playing with ATTiny13 micros – I was setting my Arduino IDE up to be able to write code for and burn the program into smaller 8-bit AVR MCUs like ATTiny13. Once the box of chocolates has been freed of its original content by my dear wife Tanya, on the way to the trash I turned it over and realised that there’s a lot of space available inside the plastic insert. I could easily tuck a battery, an MCU and a bunch of LEDs in there for a nice blinking light effect. Read the rest of this entry »

Eadweard Muybridge, zoetrope (zoopraxiscope) and … Google?

Google's Zoetrope Doodle (04-09-2012) to celebrate the birthday of Eadweard Muybridge

Google's Zoetrope Doodle (04-09-2012) to celebrate the birthday of Eadweard Muybridge

Starting the Arduino Stroboscope, one of my recent projects, I had no idea the ancient technique could still have such universal appeal in the age of full-length 3D animated movies. It was a rather pleasant surprise to see Google celebrating today (04-09-2012) the birthday of Eadweard Muybridge, the stop-motion photography pioneer, with a special animated (obviously) doodle. The static snapshot of the doodle does it little justice, you need to head over to Google and click that “play” button in the middle to see the iconic galloping horse animation play out. Well, OK, trotting – I’m not much of an equestrian :) . Read the rest of this entry »

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Recent Comments
  • admin: Thanks! Glad you made it work! This way of driving a bipolar stepper was just to prove a point that it’s...
  • Matt: Hey bud I got this all to work after some trial and error, now how ever I would like to drive 2 steppers for my...
  • admin: How did you measure the 225mA output? Did you connect 4 diodes (regular rectifier diodes, not laser of course)...
  • David: Hello. I have extracted a 5.6mm diode from a 16x DL dvd burner, I already have an AiXiz module and driver...
  • admin: Thank you for stopping by, Mark! If you are using the same hardware, just be sure to not overload the driver...
  • Mark N: Spot on. exactly what I want. Just a fwd/Rev speed control, stepper motor to drive the X axis on my Milling...
  • admin: That’s right – R4 pulls the Enable input of the chip down, and the driver will be off until...
  • Nate: I have a question on the R3/R4 and ttl. So you say that if R4 is installed its normally off. So the laser is...
  • admin: Thanks for stopping by, Tom. I don’t have a ready-made DXF but the Eagle board file attached above in...
  • admin: It does need to be on a ferrous material for a great increase in performance. Although I do believe you can...
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