This is The Fet Amplifier circuit. This circuit uses FET transistor. The gate of the FET must be negative with respect to the source, so a bias can be achieved in the following manner. The voltage that is across the source resistor is developed by the drain current flowing through the source resistor. Due to that action, the emitter become positiv
Click here to download the full size of the above Circuit.
e with respect the zero volts rail. Here is the schematic diagram of the circuit: The fet is biased correctly, since the current does not flow at gate make the gate has a zero volts. So, the gate is negative with respect to the source because the source is positive with respect to the gate. The drain current is controlled by the signal voltage that is applied to the gate. The drain current will be decreased when the signal goes less positive. It will make the drain voltage goes more positive because just a little voltage across the drain resistor. The drain voltage will goes more negative and more voltage across the drain resistor when the drain current is increased because the signal voltage goes more positive. So, the drain voltage does the opposite of the gate voltage. The silicon controlled rectifier (S. C. R. ) is called as the thyristor. It is like a diode, when the cathode is negative with respect to the anode, the current flowing from cathode to anode. But, the difference of thyristor and diode is Continue reading †’. This is a JFET switch circuit. This circuit uses a MPF102 JFET transistor. In this circuit, the JFET is symmetrical, so the input can be source or drain. The MPF102 is used because this transistor has gate`s reverse breakdown voltage of Continue reading †’. Audio mixer is used to mix several audio signal from many channel into one channel, in analog form. The basic requirement of an audio mixer is that...
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.....
characters left: