Daily Archives: September 23, 2014

Build a simple Hydraulic machine

Posted on September 23, 2014 by robertwilkie

Nice build on what to use with those suction medicine gizmos.  Make a demo hydraulic system for kids. http://www.instructables.com/id/Open-Ended-Hydraulic-Machines/

Posted in Cheap, Teaching and Learning | Comments Off on Build a simple Hydraulic machine

Waterproof matches with leftover nail polish

Posted on September 23, 2014 by robertwilkie

I was trying to figure out what to do with some leftover nail polish, and stumbled onto this article.  basically you dip, or paint the polish on the matches and bang, waterproof matches.  The author also mentions you can do … Continue reading →

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Nice simple RFID reader for security doors

Posted on September 23, 2014 by robertwilkie

The author build a $3 arduino board, and uses that Parallax RFID reader (about $40) and some relays to add RFID to a door to unlock it.  Nice build, code could be a bit cleaner thought. http://theifdark.blogspot.ca/2014/07/arduino-rfid-card-door-lock-system-100.html

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How to re-tin your solder iron tip

Posted on September 23, 2014 by robertwilkie

I have always tossed mine out when they get bad and get a new one, but this is a nice write-up on how to use salt, well Sal ammoniac to re-tip it. http://www.evilmadscientist.com/2014/tinning/

Posted in Cheap, Tools | Comments Off on How to re-tin your solder iron tip

Amazing chart of spaceships

Posted on September 23, 2014 by robertwilkie

This is an amazing chart of many scifi spaceships all lumped together with size comparisons. http://www.engadget.com/2014/09/22/sci-fi-spaceship-comparison-chart/?ncid=rss_truncated

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PWM for Arduino Due

Posted on September 23, 2014 by robertwilkie

Nice write-up on a better Pulse Width Modulator for the Arduino Due (the ARM based one). Which is much faster and cleaner than running on original arduino. http://www.kerrywong.com/2014/09/21/on-arduino-due-pwm-frequency/

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The evolution of 3D printed guns

Posted on September 23, 2014 by robertwilkie

Its an interesting article that goes over the fast pace the development into 3D printed guns is undergoing.  My 2 cents, it would be a heck of alot easier and cheaper (most folks don’t have a 3D printer) to build … Continue reading →

Posted in CNC/3D-printing, weapons | Comments Off on The evolution of 3D printed guns