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I've got a nice easy kit to play with today. But it's interesting to see how it does what it does. MISTAKE WARNING: the device at the ...

I spotted this interesting little G8 style LED light in the clearance bin at a local hardware store and it got me curious. Of course ...

Several people (including me) were curious about that cheap inverter from the latest mailbag, so time to dive in and see what its ...

Back in mailbag#80, I received a gift of this T-12 style soldering iron. Now that I've got my hands on some tips for it, I thought I'd ...

A whistle-stop tour of how computers work, from how silicon is used to make computer chips, perform arithmetic to how programs ...

In this tutorial, I'll show you the basic soldering techniques, explain the process, and help you avoid common mistakes. First, I'll ...

There were some questions about the cheap charger from last week's mailbag, so let's take a closer look. Here's the datasheet ...

Watch this awesome smd soldering practice project featuring both SMD and through-hole components with LDR (Light ...

An interesting electronic key / employee tracking device. Turns out, it's not too exciting inside, but you never know these things ...

Learn the difference between Class A, Class B, Class AB, and Class D audio amplifiers in this short video. See how each amplifier ...

I sat down to sort out the assortment of zener diodes from a mailbag a while back, and this is the result. Sadly, the result is a bit ...

After seeing that LED light bulb kit in the last mailbag, I knew I wasn't going to wait very long to build it. And, since there has been ...

Another assortment of goodies for your perusal. This time, including one special request from my generous patreon supporters!

February 24, 2025 -- In this episode of Chalk Talk, Sarah Alqaysi from Siemens and Amelia Dalton investigate the Siemens ...

New version available at: http://www.youtube.com/watch?v=f5fwdGFBrwU Table of content: 00:05 Introduction 00:32 Jacks / test ...

I found this early '90s era power supply on it's way to the scrap heap, and I got curious about what's under that massive heatsink.

No-nonsense breakdown of the original ESP32, ESP32-S3, ESP32-C3 and ESP32-C6, ESP32-H2, and upcoming P-series chips!

This tutorial deals with the very basics of transistor amplifiers. Starting with different types of transistors, the video focuses on the ...

This is the meter that I received in mailbag 61 - a meter that my patreon supporters suggested that I take a look at. Yes, it's another ...

In this video, I explain how messages are transmitted over electromagnetic waves by altering their properties—a process known ...