actually, plugging a "bad" small amp/speaker on a #Raspi 1 on battery reveals entertaining... even technically usefull
It kind of speaks like R2D2 with all the interferencies it makes on the native audio port (and bad earth connection) ...
you can actually follow it's innerworking by the ears, readings the sdcards, or downloading stuff, calculating, ... like an audio prompt or progress-bar
@Olm_e reminds me of the AM radio of my old car. It roared when you revved the engine :-)
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