A 2n3904 ,C.C. transistor amplifier output to drive a spkr. to audio range

I design my circuits at the hobby level, so anybody who has basic knowledge of electronics can get these kind of results too.
That's the whole purpose of wanting to help those who are starting out, if I can get these kind of results at the hobby level, than so can you, I want to show that transistor circuit design at the (HOBBY LEVEL), is not formidable, and can be fun to play around with.

Here is a demo video of it amplifying the electronic switching sounds in a cell phone.

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