Building battery boxes for the Speedster. While not an exciting topic, in converting almost any car to electric drive, most new builders are surprised to learn that making the car run on battery power is almost trivial. But 50% of the work centers on placing batteries and building structures to hold them. So to avoid making this episode a total yawnfest, we`ve decided to tackle a probably useful element we
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promised almost a year ago when we did our episode on the new J1772-2009 standard/plugs/connectors. That is, how to wire your car to actually do J1772 charging. With the Chevy Volt and the Nissan Leaf finally shipping. er. more or less shipping. we think you`ll finally begin to see some J1772 charging stations begin to appear. We build our cars to charge quite automatically from either 120VAC single phase or 240vac two phase power. And we almost always use a NEMA 5-15 recessed male connector on the car so that we can universally connect the car anywhere and to virtually any ordinary household extension cable - albeit you do generally want to use a heavy one. This is mildly illegal in most respects. First, NEMA5-15 is entirely meant for 120vac operation at 15 amperes or less. In practice, we charge the Speedsters at about 25 amperes and 240vac. We simply make up a cord or "adapter" with a NEMA L6-30 or NEMA 14-50 connector on one end, and the usual NEMA 5-15 female on the other. This is not good frankly. But it is very convenient. If you go to gramma`s house, you can still plug in and get a toke on her good juice, even though there`s no charge station there. We buy the best cables and connectors we can find, and while they get warm, so far no incidents. But it isn`t really kosher. And soon it will even be a disadvantage. As J1772 charge stations start to appear, at the least in the garages of friends with Nissan Leaf or...
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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