Category Archives: Electronics

The EBCs of BJTs

Posted on 2014-11-30 by M. Eric Carr

Bipolar Junction transistors (BJTs — NPN and PNP types) are inexpensive, reliable, relatively easy to use, and very useful. Here’s how they are used. Continue reading →

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Components: Servos

Posted on 2014-10-31 by M. Eric Carr

Servo motors are useful devices. Here’s how to drive them using a microcontroller or similar device. Continue reading →

Posted in Components, Digital, Electronics, HOW-TO, Robotics | Leave a comment

FreePCB Arduino Shield Template

Posted on 2014-09-16 by M. Eric Carr

Having been too busy / lazy to sit down and learn Eagle CAD or another “real” PCB program, I’ve been using FreePCB to make all kinds of PC boards on the LPKF board plotter at work. With our increasing use of … Continue reading →

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Resistive Security Loops

Posted on 2014-07-30 by M. Eric Carr

Incorporating a resistor into a security system loop circuit can make it a lot harder to spoof — provided it’s done correctly. Continue reading →

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