This Propane – Oxygen Cannon & Shock Tube is one heck of a project. Looks great and should work very well, don’t think there is a video of this one in action though.  “When a stoichiometric mixture of gasses is ignited, it is known as a deflagration, which results in a subsonic pressure wave. The principal behind the shock tube is to use the subsonic wave to compress a
Have a look at the Bluetooth Smart Car Project from Elecfreaks. If you are looking for a new project they provide some nice step by step instructions to get you going on this one. Thanks for the tip Kathy “DIY enthusiasts can build their own smart car with simple kits like building blocks, controlled with Bluetooth 4.0 joystick or app. With simple communication protocol, the car can achieve human-computer
I had one of these Siemens 100 Amp Double Pole Breakers go bad I was curious what went wrong. The failure mode was one phase was good under a load of 20 or 30 amps but the second phase dropped to around 60 or 70 VAC under load. You can see in the video that the copper braided cable had a weld that failed. I make some wrong assumptions
 DonEduardo built a Talking Autonomous Robot that has some personality. It wonders around looking around with his ultrasonic sensors, it can look to see if it is enclosed where it can take a nap. Every now and then he speaks. Very cute robot! The brains of the robot is Parallax based, the locomotion comes from a Roomba.
