1 Amplitude Modulation tutorial and AM radio transmitter circuit
Explains amplitude modulation and builds a simple op-amp AM transmitter; the circuit is widely copied, and people often ask how its mixer stage really works.
Topic
oscillator
5 videos. Ranked by independent recommendations, not by views.
2 #105: More Circuit Fun: Simple 3 transistor sawtooth generator / oscillator
Builds a simple three-transistor sawtooth oscillator and shows it running on a scope; people copy the circuit but report it gets finicky at higher frequencies.
3 How Does Wireless Charging Work? || Crude Wireless Energy Transfer Circuit
An introduction to how wireless charging works, suggested as a good first watch and credited with explaining the coupling capacitor in the transmitter oscillator.
4 The simplest DIY audio oscillator? not a 555 chip. reverse avalanche
A simple reverse avalanche oscillator build from a prolific DIY synth maker, suggested as an easy first project for anyone wanting to make noise with electronics.
5 The Surprising Secret of Synchronization
General science video on how coupled oscillators such as metronomes fall into step; cited as background when people ask whether crystal oscillators or blinking LEDs synchronise.
