Category Archives: circuits

Physical x Wonderfl

Shigeru Kobayashi, who made Gainer and Funnel, has made yet another nifty tool for physical computing:  physical x wonderfl. It combines Gainer, Funnel, Firmata, Arduino, and Wonderfl.

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Controlling Lots of Outputs from a Microcontroller

Making LED displays is fun. There are a a few tools that get used all the time, from row-column scanning to LED driver chips to multplexers and shift registers. This tutorial discusses some of the more popular methods for controlling … Continue reading

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CD4099 Addressable Latch Used to Control LEDs

This tutorial will show how to control multiple LED outputs from a microcontroller using a CD4099B  addressable latch. Parts you’ll need: CD4099B addressable latch Arduino microcontroller (Any model will do) 16 LEDs

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CD4067 Multiplexer used to control LEDs

This tutorial will show how to control multiple LED outputs from a microcontroller using a CD4067  analog multiplexer. This is a stub. More explanation will follow, but for now, here are schematics and code for Arduino. Parts you’ll need: CD4067B … Continue reading

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STP16C596 Shift Register

This tutorial will show how to control multiple LED outputs from a microcontroller using an STP16C596 shift register. The STP16C596 is similar to the popular 74HC595 shift register, but it’s nicer because it can sink a constant current to the … Continue reading

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Tilty ball: Controlling 64 LEDs and a 2-axis accelerometer

This example shows how to control 64 LEDs and read the input from two axes of an accelerometer on an Arduino.  The Arduino used here is a Duemilanove, but it will work on any of the models out there prior … Continue reading

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A Tale of Two Pongs

When I start learning a new  platform, I have a simple rule: If you don’t know what to do with it, make pong. What I love about pong is that it’s a simple rule set, easy to understand, and implementable … Continue reading

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8×8 LED matrix control on an Arduino Mega

Once you’ve mastered microcontroller programming, you might be tempted to control a lot of LEDs.  Lots of people have this desire once they master the basics. Many microcontrollers have a limited number of output pins, however, so you might think … Continue reading

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Controlling Inkjet Printers from a microcontroller

There was an interesting thread on the Sketching in Hardware mailing list a while back on how to control an inkjet printer.   Wendy Ju started the discussion. Following are some of the links from that thread: A closed, proprietary portable … Continue reading

Posted in arduino/wiring, AVR, BX-24, circuits, pBasic (Basic stamp), PIC | Tagged | 1 Comment

Dynohubs: power from bikers

Lots of people are into mechanical generation of electrical power these days, so here’s a nice tip from the guys at Uncommon Projects: dynohubs.  I had a note in my inbox for months that just said “dynohubs, Tarikh.”  So I … Continue reading

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