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I don’t know if it’s this specific guy or someone like him, but I’ve seen quite a few videos along this style. Always have to turn down the sound, that “music”. 😖Â
I wish guys like this would actually speak and explain the how, what, and why of the circuit, with at least the basic formula for the center frequency. That’s why I gravitate toward sites like Elliot Sound Products (ESP) and Best Engineering Projects, or even Red Free Circuit Designs. I’ve got a ton of other links as well, going way back to the early day of the interwebs. Plus, there’s a number of electronics guys out there on YT I could link if you don’t already follow them.