This area shows the construction and testing of a new half-wave (dual) Tesla coil. This type of coil has two secondaries driven by a single tank circuit. The design shown here is a small and rather in-efficient dual coil constructed from scrap parts for basic purposes. This area shows the functioning Tesla coil being tested as well as some other m
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inor improvements being made. The tesla coil project is aimed mainly at the scientific and Tesla coiler community. I intend to use my Tesla coil for lightning demonstrations and entertainment. This section shows another different type of Tesla coil design called a half-wave or "twin" Tesla coil. Basically this type is two primaries and secondaries with the primaries wound 180 degrees out of phase in a series fashion. A single tank circuit capacitor and spark gap drives both opposing primaries and a split phase output develops on each secondary top terminal with the RF ground acting as a "center tap". My dual coil was made entirely from scrap material that was left over after building the main single Tesla coil. Instead of throwing it away, I decided to build a small table-top dual Tesla coil. The self-contained system is built in a wood and plexiglass box about 6 inches high, 6 inches wide, and about 16 inches long. The HV power is provided by the same small 10 kV, 23 mA oil burner transformer used in earlier experiments. It was unpotted from its tar case, placed in its own compartment, and sealed in wax (from old candles melted down) becoming and integral part of the coil base unit. The tank circuit is two 30 kV, 0. 0025 uF doorknob type capacitors in parallel (0. 005 uF total). A MMC of 32 10 kV rated capacitors (0. 008 uF total) sealed in wax did not work too well so the doorknobs were used. The series spark gap is a...
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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