Category Archives: sensors

Hall affect limit switches

Posted on April 4, 2013 by robertwilkie

I like this idea, most of the limit switches I use for CNC are mechanical based.  This is a magnetic field based and is contact less.  It doesn’t look like it would cost much to make either.. http://hackaday.com/2013/04/03/hall-effect-limit-switches-for-a-3d-printer/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+hackaday%2FLgoM+%28Hack+a+Day%29  

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Make a water tilt switch

Posted on March 19, 2013 by robertwilkie

Simple directions for a basic “trigger” when the water tips.  Why would you do this?  To see if something is “leaning” when it should not be. http://www.instructables.com/id/make-a-water-tilt-switch/

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Water fill circuit

Posted on March 19, 2013 by robertwilkie

Nice write-up on how to build a circuit to control the water level without using a standard float switch.  This could be something interesting to do in the future. http://www.instructables.com/id/Build-a-simple-water-level-control/?ALLSTEPS

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Portable Powered Motion Sensor

Posted on March 7, 2013 by robertwilkie

So why would you want this.  Think haloween props and other holidays where you want something to turn on to greet guests. http://www.instructables.com/id/MOTION-SENSOR-Good-to-GoQuick-Easy/  

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Nice intro to capactitive touch sensors

Posted on March 6, 2013 by robertwilkie

Nice intro into how it works. http://dangerousprototypes.com/2013/03/02/microchip-capacitive-proximity-design-guide/

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Smartpulse, opensource pulse/O2 reader

Posted on February 26, 2013 by robertwilkie

This is neat, and small, its an opensource project in a competition for the insertcoin contest.  It can read O2 and pulse of a person and apparently can connect to other systems via bluetooth 4.  I didn’t pull up any … Continue reading →

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Build a Wireless Robot

Posted on February 17, 2013 by robertwilkie

Interesting build with some scrap parts (kids old toys) , a quazi arduino, and other bits.  I think I would have skipped using bluetooth thought… http://www.instructables.com/id/Wireless-Robot-V2-Support-WiFi-Bluetooth/

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Phonejack Thermometers

Posted on January 18, 2013 by robertwilkie

Nice write-up on making some Thermometers that you can run off of existing phone lines.  Why would you do this, well record what room is in what temp.  Re-use phone lines (who uses POTS anymore anyways?).  Of course the controller … Continue reading →

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Use a TP-Link as a camera broadcaster

Posted on December 30, 2012 by robertwilkie

OK something else to add to my list.  Why would this be useful, think cheap wireless camera.  I have some good  cameras that would be nice to “network” them.  And TP-link are cheap.  http://forums.openpilot.org/blog/52/entry-91-tp-link-wr703n-as-telemetry-link-and-camera-broadcasting-part3-video/ http://dangerousprototypes.com/2012/12/13/tp-link-wr703n-as-telemetry-link-and-camera-broadcasting-tutorial/  

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3D scanner with an arduino, a motor, and some legos

Posted on December 3, 2012 by robertwilkie

Nice writeup on building a 3D scanner.  Which you will need to scann in and print out 3D objects  🙂 http://www.instructables.com/id/Lets-cook-3D-scanner-based-on-Arduino-and-Proces/

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