A thyristor is like a diode; it can pass electricity in a forward direction but, blocks it in a reverse direction. The difference between a diode and a thyristor is that the thyristor is a three terminal device consisting of an anode, cathode and gate, which will also block current flow in the forward direction until it`s gate is signaled to open
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or, to use more technical jargon, the thyristor is fired . Once turned on, the gate signal is removed and the thyristor remains on until the current through it drops to zero, which conveniently happens during each cycle of the main supply. Thyristors are most commonly known as Silicon Controlled Rectifiers (SCRs), Triacs, Thyristor Surge Protective Devices & SIDACs, and Programmable Unijunction Transistor (PUT). Although it can take many forms, they all have certain things in common. Normally-off switches, a small current pulse into the gate electrode can trigger thyristors on . Once triggered, the component then stays in the conducting state even when the gate on signal is removed. It only returns to the off (blocking) state if the current falls below a certain minimum or if the direction of the current is reversed. The circuit symbol is shown below. When there is no gate current, the device is in the non-conducting state and will hold off positive and negative bias voltages. The zero gate current characteristic is: Coilgun Thyristors are the device of choice when using a basic capacitor discharge coilgun. The thyristor will hold off the capacitor voltage until it is triggered into the forward conduction zone by the gate current signal. The capacitor then discharges through the thyristor into the coil and the current decays to zero. There is no option for turning off the current once the device is conducting....
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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