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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 mixture of flammable gas and oxygen in a tube of specific geometry so rapidly that the driven gas mixture detonates rather than deflagrates generating a supersonic shock wave. In this particular type of shock tube pressure waves have been generated as high as Mach 7.”
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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 interaction.” |
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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 along the way, I had always thought that double pole breakers were simply 2 single pole breakers bolted together as one unit and didn’t have any interaction other than the linking bar. As you will see in the video they have a mechanism of tripping each other. The trip mechanism is quite simple, it was tested with a direct application of heat rather than enough current to actually trip it since I am thinking it would take a sustained 120 or 130 amps to make it trip and I don’t have anything that can supply that kind of current. To see the pictures of the breaker in Hi Res click here.
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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.
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The prize this week is the thing you are guessing. Please do not give the answer in the comments. Send an email to contest @ hackedgadgets.com with “Name the Thing Contest” as the subject, and the message body consisting of:
The winner will be chosen at random from all of the correct entries. Below is a picture of the prize.
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Ever wonder what marvelous things were inside a Mechanical Light Switch Timer? Me neither, but I had one go bad on me and I was curious what caused the failure. Turned out a tiny piece of plastic cause the failure. This could have been built just the tiniest bit beefier and it would still be working. To see the below pictures in hi-res click here.
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Thanks to Gear Best for sending in a Syma X5C Remote Quadcopter for us to take apart and review. Use the coupon code below to get a special Hacked Gadgets price for this unit. This is the first quadcopter I have looked at so I am no expert. Unfortunately the weather conditions in Winnipeg are not the best for doing any outdoor flying so the most we could do is a basic buzz around the livingroom. This thing can get some great altitude and seems to take some good video when in daylight. The few pictures I took were in the livingroom in a low light conditions. The first video goes over what is in the box and a short indoor flight. The second video shows us what makes the magic happen. If you want to see what it can do outdoors (can’t wait till summer) have a look at the video that Quadcopter 101 made here.
Get the Syma X5C-1 6 Axis Gyro Quadcopter now for $49.99 using the code below. Coupon Code: GBX5CCN
You can see the full sized images here. The three main chips on the control board are: Processor : NUVOTON MINI 54ZAN Wireless : BEKEN BK2423 Stability : INVENSENSE MPU 6050C
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There are always a few entries where the guess is the prize, this week all of those entries will be correct! This contest will run for one week (Nov 29 – Dec 5, 2014). Ending time is based on central standard time. To enter, identify the item above and what it can be used for. Please note the image above is a side view of the thing.
