18-year-old electrical engineer student, Chris Rieger, has been working on his levitating light bulb project ” fittingly referred to as the LevLight Project ” for about six months now. Recently he posted images and a video of the project, both of which have since made their rounds on tech sites all across the Internet under the headline, Ho
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w many engineers does it take to float a lightbulb (It was, admittedly, really hard to not make that the headline here. ) The project is impressive, and Rieger was kind enough to provide Electronic Products with the details of how he worked it out, as well as video of his levitating light bulb in action. Rieger is quick to point out that magnetic levitation is not easy. Countless hours, he explains, were spent pouring over papers and textbooks, reading up on every project ever associated with the technology. There were many failed attempts, and countless components and boards wasted in an effort to get his light bulb off the ground. Rieger used a 3-pin linear Hall Effect sensor to act as a feedback mechanism, and a 1. 325mV/g sensor ” the smallest sensitivity he could find, as the magnetic flux it was sensing was maxing out the reading on others. This was the hardest part of the project, according to Rieger. He started off using 555 oscillators, but found the power transfer wasn`t strong enough and waveform nowhere near useful. He decided to instead update an old but simple design by 4hv. org board member Marko, so as to better limit the heat being generated. He then went ahead and built the wireless power receive circuit: A simple LC circuit tuned at exactly 1Mhz. The aspiring EE then used his scope and components to manually tune it, making small changes over a series of nights to the geometry of the coil to change the...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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