1 Tutorial: How to design a transistor circuit that controls low-power devices
A tutorial on using a transistor to switch a load that an Arduino pin cannot drive directly, commonly suggested for relays, motors and LED strips.
Channel
Applied Science
12 recommended videos. Channel on YouTube
2 Engineering magnetics -- practical introduction to BH curve
Recommended as a practical grounding in magnetic cores and BH curves, aimed at inductor design but useful for anyone puzzled by ferrites and magnetism.
3 Laser diode self-mixing: Range-finding and sub-micron vibration measurement
Applied Science uses a laser diode's built-in monitor photodiode for self-mixing interferometry, measuring distance and sub-micron vibration; cited when people ask about the third pin.
4 Building a liquid crystal display (LCD)
Applied Science builds a working liquid crystal display by hand, and the video is shared as a clear way to understand how LCD segments switch.
5 Decapping ICs (removing epoxy packaging from chips to expose the dies)
Shows the process of stripping the epoxy from an integrated circuit to expose the die, linked to illustrate what decapping involves and how chips are encapsulated.
6 DIY Custom LCD
Ben Krasnow builds a liquid crystal display from scratch, cited to show how LCD segments switch and as a clear example of spin coating a substrate.
7 E-paper hacking: fastest possible refresh rate
Applied Science explores how e-ink displays work internally while pushing their refresh rate, cited for understanding the panels before driving one yourself.
8 Explanation of how kilowatt-hour meters work (electromechanical)
An explanation of how the mechanical kilowatt hour meter on a house works, recommended as a clear way to study the spinning disc and its magnets.
9 Unusual usage (hours) counter with mercury capillary
Ben Krasnow explains how a mercury coulometer hour meter works, linked whenever someone finds one of these unusual elapsed time indicators in old equipment.
10 Viewing an active electronic circuit with a scanning electron microscope
Ben Krasnow uses a scanning electron microscope to make voltages on a live chip's surface visible, linked when people ask whether electric fields can be seen.
11 How anti-theft tags work - magnetostriction
Linked to explain how magnetostriction based shop security tags work, offered as the starting point when people ask about anti-theft gates.
12 Tutorial: Electrical impedance made easy - Part 1
Ben Krasnow's two-part introduction to electrical impedance, praised for explaining the idea clearly without making it more complicated than necessary.
