As the circuit operates, the three sets of diodes with their isolation capacitors, build up an increasing voltage on capacitor ?C1?. The voltage at point ?B? will also increase and be about twelve volts less than the voltage on capacitor ?C1?. Eventually, that voltage will rise high enough to cause a discharge through the tiny neon tube and that current pulse flows through the Gate connection ?G? of the thyristor, switching it on. Once switched on, the thyristor stays on until capacitor ?C1? has been discharged, after which, the thyristor switches off and the process starts all over again. The amount of power in these pulses is considerable and the thyristor gets quite warm when the circuit is running. The BT151-800R thyristor can handle as much as 800 volts and pass 7.5 amps of current continuously.
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An important point to note is that the power available from this circuit increases with additional aerials. With two aerials connected, the power is doubled and with three aerials the power is tripled. That is, each additional aerial provides as much power as the first aerial did and there does not appear to be any limit to the number of aerials which can be connected.
The suggestion is that the aerial is suspended between the eaves of a house and a nearby tree, but I don?t know anybody who would be able to do that. The longer the aerial or the greater the number of aerials connected, the greater the charging power available. The aerial wire should be not less than 0.5 mm in diameter and it needs to be insulated from it?s supports ? plastic cord can be used for that.
The RF antenna connected to a circuit configured to convert the RF signals to Direct Current. The radio frequency signals received by the antenna are transmitted to two leads, one being rectified to produce positive voltage and the other rectified to produce negative voltage. The positive voltage lead is connected directly to a positive output line and the negative voltage lead is connected directly to a negative output line. The positive output line is connected to a pair of bus lines through a first pair of capacitors, while the negative output line is connected to the pair of bus lines by a second pair of capacitors. Placed between the first bus line...
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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