Not exactly sure what kind of AC or DC motor would be needed to make this. Is it even a realistic idea to make electricity by using a motor as a generator?
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\$\begingroup\$ The YT demo uses a small DC motor. \$\endgroup\$– tlfong01Commented Jun 10, 2022 at 2:34
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1\$\begingroup\$ I tried to use a small Dc motor as well but it didnt work. Do I have to choose one with a lower rpm? \$\endgroup\$– hello_world07Commented Jun 10, 2022 at 2:46
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\$\begingroup\$ (1) Brush DC motor should do. (2) Perhaps use one motor to turn another (which becomes a generator), using this coupler, ... / to continue, ... \$\endgroup\$– tlfong01Commented Jun 10, 2022 at 4:09
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\$\begingroup\$ (3) Rigid Shaft Coupler Motor Connector Copper Sleeve 3.17/4mm/5mm/6mm/8mm/10mm/12mm Ship Model Accessories - AliExress US $2 fr.aliexpress.com/item/… \$\endgroup\$– tlfong01Commented Jun 10, 2022 at 4:09
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\$\begingroup\$ The Creative Crafts Guy youtube.com/watch?v=V3NtSp6aAbs seems using DC motor GB370 @2:53 References: (1) raspberrypi.stackexchange.com/questions/137762/… (2) raspberrypi.stackexchange.com/questions/94031/… (3) circuitlab.com/circuit/n7764g3wm5d2/irl540n_motor_2022jun0401 (4) imgur.com/a/dxif3bJ \$\endgroup\$– tlfong01Commented Jun 10, 2022 at 4:19
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2 Answers
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Almost any permanent magnet, brush-type DC motor (one having a commutator) should work as a generator. Don't use a brushless motor, as found in computer fans. Motors from an inexpensive battery-powered toy would likely work.
That said, the power output depends on the speed of rotation, the number of poles, permanent magnet strength, etc. Almost any small motor, when spun by hand, could light an LED, for example, but not a small incandescent flashlight (torch, for the UK) lamp.
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It's a brushed permanent magnet DC motor,
It will need to spin quite fast to make enough voltage to light an LED. much more than the approximately 1000RPM seen in the video
answered Jun 10, 2022 at 5:00