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Topic: Centipede Shield - also a contest! (Read 7 times) previous topic - next topic


Nov 09, 2009, 02:31 pm Last Edit: Nov 09, 2009, 04:38 pm by efluon Reason: 1
great! this will make it easy for me to build a (hardly original nowadays) stepsequencer for drums. sort of like monome but 4 rows with 16 steps (using something like the sparkfun 4x4 button pads (not allowed to post that here)). there will be 16 rotary encoders, how to use them is something i'll still have to figure out for myself, but i guess it should even be possible using two of these shields!

Gabriele Bellini

This shield could be ideal for a fancy wall mounted analog clock: 60 outputs which drive 60 leds (for example, high brightness, white leds). One led for each minute (6 degrees), closing the circle. Leds are soldered in order to project each light beam almost parallel to the wall surface (it's preferable to use very narrow beam leds).
The project is very, very simple, since the software must basically drive in a very clever manner 60 different outputs (2 pushbutton inputs for time setting and/or IR input to do the same job).
The hardware part is also quite simple: if we don't want to rely on Arduino clock settings, we only need to add an RTC to the Arduino in order to keep the time as stable as possible. For the code, it's up to our fantasy to find a way to display the time. Some ideas:
1. All leds are powered off except led (or group of 2, 3, 4 or more) to show the hour; slow blinking led (or group) to show the minutes and optionally fast blinking led (leds) to show seconds;
2. All leds are powered on (pay attention to maximum sink/source current from IC) and 2 different blinking rates to show hours and minutes: this way the clock could be used also as  a very original wall mounted lamp/clock!
3. More ideas, please! (consider that you can find other purposes for this gadget, not only a clock, but: countdown timer, analog thermometer, vu-meter, whichever-physic-environmental-variable-meter...)

tom hofmann


I find this perfect for application in driving all the indicators and switches on the overhead panel of a home-built flight simulator for a B373-700 airplane.

Usually you need to run a rats nest (hundreds) of cables to the IO board located elsewhere in the electronics bay.

Using this, with a local power supply, a simple two or three wire cable is all that is needed

All the best


I have an old electric-air-blower-powered organ, with several octaves and a chord section, which works by opening/closing holes in a large box (picture a saxophone's key mechanisms).

I'd like to retrofit it with lots of solenoids for pushing the buttons, and interface it to MIDI via an Arduino.

Your Centipede Shield should provide enough outputs to do it right, with a few pins left over for control buttons and an LCD display!


Nov 10, 2009, 03:31 am Last Edit: Nov 10, 2009, 03:31 am by zzz_tek Reason: 1
I am going to be building a custom EEG/EMG monitor. I need multiple channels so I can monitor the electrical activity of various areas of the brain and muscles I'm studying.

This many I/O inputs would allow me to increase my ability to monitor and interpret the electrical impulses from a variety of sources at the same time.

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