Digital Magic 8 Ball

May 11, 2012 by Brian Benchoff No comments

[sjm4306] had a small Magic 8-Ball key chain as a kid. The fluid in this key chain eventually dried up, and if [sjm] is anything like us the 20-sided die is now lost to the sands of time or at the very least hidden in a box in the basement. After remembering the old Magic 8-Ball one day, [sjm] decided to build a digital version of everyone’s favorite bewitched billiard ball.

The digital magic 8-ball uses a PIC16f886; more than enough to hold the twenty possible replies from a real magic 8-ball. The display is a tin 3 cm OLED which surprisingly emulates the ‘icosahedron with raised letters floating in purple liquid’ aesthetic very well.

Right now, this is just a breadboard prototype – there isn’t an accelerometer or tilt switch in the build yet, so shaking the project does absolutely nothing. [sjm] may add that functionality later by turning his project into a watch, key chain, or installing it in a real Magic 8-Ball case.

Generating Electricity With Swing Sets

May 11, 2012 by Caleb Kraft 7 Comments

[Guelherme Pena Costa] came up with an idea to light up a swing set using the motion of the people swinging on it to generate electricity. The goal was to get people to enjoy the playground at night and we think, this might actually be a pretty good way to achieve that. People love blink lights, especially if they are interactive.

To Light the LEd ropes, [Guelherme] has attached a gear motor to the frame of the swing set and an arm to the chain. When the swinger swings, it spins the motor generating between 6 and 10 volts at 230-400 mA. As you can see in the video below, that works fine to illuminate the LEDs, though we think a charging circuit to allow the lights to stay lit for longer would also be cool.

Cruncher: A Robotic Toy Dinosaur Dissection

May 10, 2012 by Caleb Kraft 2 Comments

When my children got these interesting and very obnoxious toy dinosaurs last year, I could barely contain my excitement. I knew that one day, they would be on my work bench giving up their secrets. Cruncher is a fairly recent addition to the robotic animal trend that we’ve been seeing the past few years. Imbued with a personality that is a mixture of T-Rex, beagle, and loudmouth jerk, he’s every kids idea of a perfect pet.

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Giant Pink Hexacopter Is Slightly Safer Than The Rest

May 2, 2012 by Caleb Kraft 11 Comments

Check out this giant pink hexacopter. We see tons of quad copters here, but their bigger brothers/sisters the hexacopters don’t visit very often. When they do though, they get all dressed up as you can see in the picture above. This prototype frame is meant to protect both the props, and the innocent bystanders as you inevitably veer into something you shouldn’t. The frame is constructed mainly from carbon fiber and adds a total of about 1 Kg of weight to the copter. While it does fly, [AirvewLive] is looking for guidance on what prop/motor combo would yield more endurance. Anyone have some recommendations?

We know some of you will notice pretty quickly that he refers to this as a “ducted fan”. We realize it isn’t and we’ll forgive him this once because his build is so cool.

[thanks for the tip Mike]

7 Foot Long Flying Dragon Breathes Fire

May 1, 2012 by Caleb Kraft 22 Comments

What do you have to do to win best of show at an R/C event in Toledo? Build a 7 foot long fire breathing radio controlled dragon of course! [Rick Hamel] stuffed his electronics, a turbine engine, a kerosene tank, and a stun gun into a home built body shaped like a dragon. You can see a few construction pics that show how he is able to steer. It looks like it flies just like any r/c airplane. This one, however could burn down a village and keep going. Check out the videos after the break to see it flying and testing out its fire breathing mechanism.

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Pinball Stomp: Part1

April 27, 2012 by Caleb Kraft 16 Comments

Despite my atrociously short attention span, I’ve always loved pinball. Maybe it is something about all the flashing lights and clunking solenoids. Maybe it is just the simple physics at the center of it all. I’m not really sure. My kids, however, don’t share my enthusiasm. I suspect part of it is that they never wandered through a fog filled arcade in the middle of the night, hopped up on Reese’s Pieces with a shrinking pile of quarters in their pocket. The other part might be the fact that they have gotten used to the Nintendo Wii and the Xbox Kinect (we just got one last week).

Watching them jump up and down playing an extremely simple and repetitive game with the Kinect gave me an idea. I envisioned pinball projected on the side of my house, the kids jumping up and down in front of it to move the paddles. Keep reading to see how I plan to build it and what I’ve done so far. There’s a full video, but also text of the entire thing.
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Micro Star Wars Arcade Game Is A Work Of Art

April 26, 2012 by Brian Benchoff 22 Comments

No, it’s not just another MAME cabinet build. [Le Chuck] over on the arcadecontrols.com forum built a fully functioning 1/6 scale replica of the classic 1983 Atari arcade game Star Wars.

The hardware is a CAANOO Linux-based portable media player running an emulation of the classing 1983 Star Wars video game. When [Le Chuck] turns his cabinet on, MAME4All boots up and goes directly into the game.

Because there are no 1/6 scale arcade parts, [Le Chuck] needed to fabricate most of his build from scratch. The case is basswood, along with the very-accurate light up coin slot doors. The joystick for the game was a bit tricky; the Star Wars game used an X Z joystick modeled after the yoke in the cockpit of an X-wing. To build this joysitck, [Le Chuck] took apart a few pots and crafted the joystick out of thin sheet metal. The controls operate exactly like the original, only in 1/6 scale.

After the break you can see the video of this incredible build in action.

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