John Edgar Park

John Edgar Park

John Edgar Park likes to make things and tell people about it. He works in CG animation at DisneyToon Studios and writes for Make, Boing Boing, and other places online and in print. You can find him at and twitter @johnedgarpark -- if you like that sort of thing.

Latest from John Edgar Park

I'm building an Arduino Nerf sentry gun. In the previous post, I showed how I wired and mounted the trigger connector. Next, I needed a circuit to fire the gun from the Arduino microcontroller. To me, the most straightforward way to do this is with a small, 5V relay wired... Read more »

This video shows how I built an ultrasonic tape measure using an Arduino Duemilanove, a PING))) sensor, and a 7-Segment Shield. Read more »

I'm building an Arduino-controlled Nerf sentry gun. Rather than build it and present the finished project all at once, I decided to chronicle the build here on Make: Online. The first step was to add wiring and a two-wire connector to control the trigger circuit. I opened up the Nerf... Read more »

I built this ultrasonic tape measure today using an Arduino, a PING))) sensor, and a 7-Segment shield. Read more »

This is an impressive use of Arduino, two servos, a webcam and Processing to tilt a ball platform. I was pretty sure I saw a copy of Make: magazine under the platform... Read more »

I put together the breadboarded relay oscillator experiment from the excellent Make: Electronics book, using the parts from the Make: Electronics Components Pack 1, both of which are available from the Maker Shed. Since the power adapter in the kit has some barrel plugs I didn't want to sever, I... Read more »

I've been playing around with the for Arduino from the Maker Shed, and I realized that I needed a basic understanding of how the seven segment display works, in order to do anything interesting with it. When addressing the display from the sample Arduino sketch, I was pulling pre-formed characters... Read more »


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