Good electronics resource on YouTube

[mjg]

I've been watching a fair few of Moritz Klein videos on YouTube - he goes into detail about how components work, explaining things from the basics and working up to full circuits. 

It's biased towards synth stuff, but I think it's still relevant to pedals. 

Anyway, here's one I just watched about sample and hold circuits.  Hoping someone might find it useful or interesting!

https://m.youtube.com/watch?v=kIJqzkRe4do