PicoMite: driving a small speaker

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Regular Member

Joined: 15/06/2020
Location: Australia
Posts: 68
Posted: 05:07pm 25 Mar 2023      

Sounds good Peter  

Considering the audio output from the Pico is virtually identical to a Class "D" amplifier (at lower frequency) I still think for direct drive of a speaker we are better off simply buffering it for more current drive and applying a little filtering before the speaker, this means no biasing and the transistors are always on or off so no heat generation. This is ok for the LO-FI side anyway.

This is the bridge version of the one above, although its starting to get more complicated than an integrated amp  

It does a very good job with steam sound effects and tones, I'll have to sort out some music to try to see how it does.

Sadly all these years of tinkering with audio hasn't made me a very good programmer..