There are easier things to make than a DIY speaker but the essential pieces of a speaker are able to be cobbled together in your workshop. It may not sound better than a $5 store bought one but at least you can say you built it with your own hands in your workshop. As Gursimran Singh mentions you might need a small amplifier to get a bit more volume
GlassKNees takes us through the build and what was needed to get this quadcopter working. Upgrading the quad to the APM controller required a few modification such as prop rotation to work, this is just since this is not standardized. “The GPS/magnetometer are inside the white dome, the telemetry transceiver is the little green circuit board on the left with the antenna pointing down – the board has a
If your car doesn’t show you the direction you are traveling it would be handy to build this DIY Car Compass. DaAwesomeP built this neat device, most cell phones have this capability but it is nice to have a piece of hardware doing the work in a fixed location. A Pro Mini is used to read in position data from a magnetometer and then output the results on a
 AvE takes apart tons of tools and when he wanted to measure torque he didn’t want to spend thousands of dollars for a professional system. He ordered some parts from ebay, connected them up to an arduino and output some serial results direct on his computer. The main component that is doing the work is a load cell which outputs a small resistance change when force is applied to
We drive across bridges all the time and take them for granted. Have a look at this 100 year old Newport Transporter Bridge. The design is absolutely fantastic. Not practical for high volume traffic but for the time this was a very novel solution and it is still operating today. “The height of the towers is 73.6 metres (241.5Â ft), and the height to the underside of the main girder
Here is a great video that explains how a conventional CPU operates. Now of course when we are dealing with a microcontroller most of this is on the single chip. This Visual Transistor-level Simulation is interesting to see what is going on.
 Turns out there is a hole in the UConnect entertainment system that can be found in many cars on the road today. This can allow hackers to take control over things like the vehicle systems like acceleration and braking. “Two hackers have developed a tool that can hijack a Jeep over the internet. WIRED senior writer Andy Greenberg takes the SUV for a spin on the highway while the
