Hello Dave,
You've got a terrific show going, and you just made it even better with this new segment. I really like your conversational "off the cuff" approach. It lowers the "stress level" of trying to learn something, and makes it easier to absorb and grasp the gist of things. If, later on, I need absolutely accurate terminology, I'll look it up in a reference book or textbook (which I can finally understand thanks to your videos getting me over the initial barrier to understanding this stuff).
Since you asked for ideas, I thought I'd chip in with my wide-ranging lack of knowledge!
Here are some things I'd like to learn about on Fundamental Fridays:
* Pulse Width Modulation
I know that it can be done with a 555, but I have no idea how it works. Maybe also cover different ways of doing it, what the benefits & drawbacks of each approach are. From what I understand so far, PWM is a very useful thing in all kinds of applications, like power supplies (would supplying a CW voltage multiplier with the output of a PWM make a proper "switching" power supply?), powering motors at variable speeds, dimming LEDs, controlling/driving stepper motors and servos, etc...
* Controlling/Driving Stepper Motors and Servos
What goes into controlling a stepper motor? How do each of the circuit stages work? Are controllers and drivers the same thing or are they completely different?
* Constant Current Circuits
* Constant Voltage Circuits
* Inductance Circuits
* LC Oscillators
* Phase Locked Loops
(Are these in the category of fundamental? Or are they a bit advanced for a fundamentals segment?)
* Latches & Logic Circuits
How the basic logic circuit elements (AND, OR, NOT, NOR, XOR gates) work at the transistor level.
* Memory Circuits
DRAM, SRAM, EPROM, EEPROM, NAND Flash & NOR Flash
* Anything with a 555 timer
There are LOTS of basic circuits that can be done with a 555 timer and just a few other components, and it would let the kids follow along at home with their 555's and breadboards.
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