Diodes - A Practica...
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Diodes - A Practical Guide

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Workshop Guru Admin
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From Avalanche to Zener, we have diodes for you today! Learn how diodes work and how to use them in your circuits. Laser Diodes included!

Diodes have been around for a very long time. They were the first tube devices and the first semiconductors, and today, there are many different types of diodes for many applications.

We’ll look at several types of diodes today. We’ll see how they are used and perform a few experiments with them. Not only that, but we will also take out a few Laser diodes and play around with them.

Here is a list of the diodes we will be learning about:

Rectifier diodes
Switching Diodes
SCRs (Silicon Controller Rectifiers)
Zener Diodes
Avalanche Diodes
Tunnel Diodes (Esaki Diodes)
Varactor Diodes (Varicap Diodes)
Schottky Diodes
PIN Diodes
Shockley Diodes
Laser Diodes

That's a lot of diodes, and each one is unique!

Here is the Table of Contents for today's video:

00:00 - Introduction
01:30 - Understanding Diodes
07:31 - Bridge Rectifier
08:50 - Bridge Rectifier Filter Experiment
11:58 - SCRs - TRIACs - DIACs
14:57 - SCR Latching Experiment
17:27 - Zener Diodes
19:05 - Zener "Voltmeter" Experiment
23:53 - Exotic Diodes
28:35 - Producing & Detecting Light with Diodes
33:27 - LASER Diode Experiments
38:11 - Conclusion

Hope you enjoy the video!


"Never trust a computer you can’t throw out a window." — Steve Wozniak

ron bentley, Ktac, Inst-Tech and 1 people reacted
Father of a miniature Wookie
Joined: 3 years ago
Posts: 7105

There were quite a few in there I didn't know about. Very informative.

First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, and 360, fairly knowledge in PC plus numerous MPU's and MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.

Joined: 3 months ago
Posts: 3

Zener diodes are something I've come across while I research something I want to build, so this is great timing as an introduction to diodes!

The Paranoid Android
Joined: 3 months ago
Posts: 32

From my comment that I posted on the 'Video', before I became registered here:


Thank you so much for this guide. I learned, not only what you set out to teach, but also a little more about how useful a tool a Scope is here.

Being very new to the topic of Electronics, this is exactly the kind of thing I was hoping that you would be doing and I very much look forward to learning much more from you.

The only thing necessary for the triumph of evil is for good men to do nothing.

Inst-Tech reacted