to learn a bit more about electromagnetism, so making your own solenoids is not even a bad idea
You can learn by making one. Making 24 is super annoying IMHO.
(Also, if you want to try, ready-made sewing machine bobbins are a good alternative to 3D-printing your own solenoid body.)
And about the rest of your comment: one approach would be to buy one solenoid from Amazon, to let you do experiments and set up the whole machine, while waiting for the rest of the goods to arrive from China.
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You can learn by making one. Making 24 is super annoying IMHO.
(Also, if you want to try, ready-made sewing machine bobbins are a good alternative to 3D-printing your own solenoid body.)
And about the rest of your comment: one approach would be to buy one solenoid from Amazon, to let you do experiments and set up the whole machine, while waiting for the rest of the goods to arrive from China.