We will create an electronic device to test the zener diode voltage.
First , Theoretically we will learn how the Zener diode work?
Let's get started
The first thing to know is that the circuit symbol for zener diodes looks very similar to other diode symbols.
Make sure you don't get them confused because they behave very differently, and they are used for very different things! So what's special about zener diodes?
Regular diode VS Zener diode:
Step by step we will learn how it works and how Zener diode current passes in two directions?
Zener diodes work exactly like a standard diode, with the exception of one thing.
When the zener is on in the forward direction, we say it is "forward biased".
The diode won't even turn on and allow current to flow unless you have at least 0.7 volt with silicon diode and 0.3 volt with germanium diode.
But going the other way, In reverse biase.
Since current is flowing backwards, we say the Zener diode is "reverse biased". This property of having a predictable voltage drop is what makes Zener diodes useful.