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Monthly Archives: February 2015
Simple write-up on making an H Bridge
Important circuit for converting AC to DC to/from a motor. Good write-up. http://www.instructables.com/id/DIY-H-bridge-for-Motor-Control/
Posted in Cheap, Teaching and Learning
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DIY Metal Etcher
This is not a toy for kids, the author basically uses a DC power supply and a wire to do the etching. Fun to watch. If I made one, I would only use it with rubber gloves…thick ones. http://www.instructables.com/id/DIY-Metal-Etcher/
The Switcheroo, some new Kickstarter project that looks interesting
I stumbled on this kickstarter via instructables, called Switcheroo (which starts 2/15). The instructables look promising (below). But… Smartlock http://www.instructables.com/id/Use-the-Switcheroo-to-unlock-doors-with-your-smart/ remote light http://www.instructables.com/id/Use-the-Switcheroo-to-turn-on-lights-with-your-sma/ Garage door opener
Posted in Misc-Life
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A cheaper way to convert a Fluorescent light to LED
Author did a nice job writing up converting a 4 foot Fluorescent fixture to LED for $30. I think it can be done for $20 myself and that includes powersupply. Funny thing is this is only a little more work … Continue reading
Poor mans IR receiver
I like this idea, the author basically takes a cheap IR LED, some resistors, and one of the A/D lines on the arduino to read IR traffic. This could be a good way to re-use old IR remotes from TV’s … Continue reading
Programming an arduino with a cheap bluetooth adapter
By cheap, I mean under $5 on ebay. Basically the authors where using an HC-06 bluetooth adapter and tied the arduino reset to one of its pins so that they could program it over bluetooth. Not a bad hack. http://morf.lv/modules.php?name=tutorials&lasit=30
How to use Android and Bluetooth
The author wrote a nice set of series on how to talk to other devices over bluetooth on android. Well for programming that is. http://www.lucadentella.it/en/2014/03/11/android-e-bluetooth-1/ http://www.lucadentella.it/en/2014/03/18/android-e-bluetooth-2/ http://www.lucadentella.it/en/2014/04/28/android-e-bluetooth-3/ http://www.lucadentella.it/en/2014/05/02/android-e-bluetooth-4/ http://www.lucadentella.it/en/2014/05/04/android-e-bluetooth-5/
Posted in android, Misc-Life, robots, Teaching and Learning
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Simple convert for a watercolorbot to a laser engraver
Nice post where the author converted his watercolor bot into a laser engraver. Note this can be done only with the newer version of the watercolorbot. I am pretty sure the original kickstarter one may not beable to hold the … Continue reading
Posted in CNC/3D-printing, Teaching and Learning
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The poor man’s forge
I have always been interested in trying out a forge, and this sure looks like a simple and cheap way to do it. But…..I am a little worried about working with molten metal (see bottom link). And of course here … Continue reading
Make a keychain with an old bike chain
clever idea, the author basically takes an old bike chain, breaks off a chunk with a breaker, and puts a keychain ring thru it. This could be a good kid project for crafts to give to family. http://www.instructables.com/id/Things-out-of-an-old-bike-chain/
Posted in Cheap, Misc-Life, Teaching and Learning
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