I made a new Solar spinner,to replace the old one which has been standing on the windowsill for maybe two years now.This one has a much more heavier propeller so it will probably not spin so freely as the other one did.I also put a voltmeter in the wooden housing(really a dB meter from an amplifier),for the rest it is a very simple design.
I'll remake the old one too,make it a bit smaller but with the same propeller.
For the rest of the projects:still working on the Pummer with the wooden balls,about to start on the Hall effect project(not sure if I will use a Pummer circuit for that).
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