I can't trust anyone who doesn't peel the plastic film off their devices.
this post was submitted on 14 Nov 2023
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Just remember, Johnson Noise (aka: Resistor noise) and Reverse-avalanche Shot noise (aka: Zener Diode reverse current) are both quantumly random events at fundamental physics levels. So you can get fundamental "true" RNGs using a cheap Zener diode.
Johnson Noise is very small though, so if you try to amplify Johnson noise, its probably going to be other noise in your system in practice (ex: P-N junction noise in your transistors/amplifiers). So I think the Zener Diode noise generators are the most elegant solution.