Contents
What is the function of Zener diode?
A Zener diode is a silicon semiconductor device that permits current to flow in either a forward or reverse direction. The diode consists of a special, heavily doped p-n junction, designed to conduct in the reverse direction when a certain specified voltage is reached.
What is zener breakdown voltage?
When reverse biased voltage applied to the zener diode reaches zener voltage, it starts allowing large amount of electric current. At this point, a small increase in reverse voltage will rapidly increases the electric current. Because of this sudden rise in electric current, breakdown occurs called zener breakdown.
What is the reverse breakdown voltage range of zener diode?
2.4 V to 200 V
Zener/Breakdown Voltage – The Zener or the reverse breakdown voltage ranges from 2.4 V to 200 V, sometimes it can go up to 1 kV while the maximum for the surface-mounted device is 47 V.
Why the zener diode is called a constant voltage device?
As such a simple voltage regulator circuit can be designed using a zener diode to maintain a constant DC output voltage across the load in spite of variations in the input voltage or changes in the load current. The stabilised output voltage is always selected to be the same as the breakdown voltage VZ of the diode.
How is the Zener diode connected to the resistor?
A resistor, R1 is connected in series with the Zener diode to limit the amount of current flowing through the diode and the input voltage Vin (Which must be greater than the Zener voltage) is connected across as shown in the image and the output voltage Vout, is taken across the Zener diode with Vout = Vz (Zener Voltage).
Is the supervision device the same as the Zener diode?
For all practical purposes, the resistor of the Supervision Device and the 3.9 volt Zener diode are the same device. Because of the exact wiring of the circuit, though, substituting one with the other may cause other problems.
Can a voltage sensor damage an Arduino controller?
But what if we increase the voltage above 25v the output voltage will also increase and so will damage the analog pin of the controller. So this Voltage sensor has no protection against the overvoltage and can easily damage the Arduino Input Pins.
How is input overvoltage protected on an Arduino?
Input Overvoltage protection Project is based on how to protect your Arduino’s Analog Input Pins and Digital input Pins against Overvoltage using a Zener Diode. The technique I am going to explain in this Tutorial can be used in any Electronics circuit.