1 Short and sweet: pull up/pull down resistors explained
A brief explainer on pull-up and pull-down resistors, often handed to beginners whose inputs behave erratically because a pin has been left floating.
Channel
learnelectronics
7 recommended videos. Channel on YouTube
2 How to clean and re tin your soldering iron
A short, practical guide to reviving an oxidised soldering iron tip, regularly pointed out to beginners whose solder will no longer stick to the iron.
3 Desoldering Technique #3: Hollow Needles
A demonstration of clearing through-hole joints with hollow steel needles, repeatedly suggested to people struggling to remove components or clear solder.
4 How to solder header pins
Pointed to as a calm, unhurried demonstration of fitting pin headers to a small board so it can plug into a breadboard.
5 How to use level shifters
Offered as a clear explanation of how logic level shifters work when connecting 3.3 V and 5 V devices, with one viewer calling it very helpful.
6 The Two Transistor Latch
Pointed to whenever someone needs one button press to toggle a circuit, showing how to build the latch from a pair of discrete transistors.
7 Arduino Spectrum Analyizer
Pointed to as an example of an audio spectrum analyser project, useful for seeing what frequency analysis on a small board can look like.
