Follow on from trying hand crank generator ( small turbine blades could not overcome inertia of gearing) now installing a NEMA 17 stepper motor instead.
1N4002's are about a 1V drop, you may want to find a much lower drop diode. Your losses are probably 15%+ because of just that.. Or, run it in a series so your diode losses are lower (as its working against a higher voltage) and then use a buck converter to change the incoming voltage down to your desired voltage.
@martint1151
3 жыл бұрын
Jeff thanks for info. , I ended up using larger 5 amp rated diode's but only small improvement in output. I found that when I was using buck converters on other projects that the greater the voltage differential from input to output the efficiency of the buck would drop considerably. They rate them as being 95 to 98 percent but that may be with very little voltage drop ? Also see similar with different usb adaptors , some have greater losses then others. I did a follow up video of " field test " and results were ok.
@mesutdogan6308
Жыл бұрын
Thank you my dear friend for the great work and information. I must admit that I am a novice at this. I did a research and came across many types of nema17 stepper motors and which one did you use, is it possible for you to give the exact model number? thanks.
@martint1151
Жыл бұрын
Hi Mesut it has been awhile back but the type I went for was a comprise between getting most amps without to much torque to be overcome with small turbine blades. I purched on Amazon type : Bipolar 84 oz.in (59 Ncm) 2amp 4 leads 17HS19-2004S1 I notice they now stock model 17HS16-2004S 2amp which has a lower torque of 45Ncm, this may be a better option.
@shagui
2 жыл бұрын
Finally you can charge a battery using a nema 17 with normal wind? Are the cables connected in parallel or in a series to be able to charge via USB? thank you!
@martint1151
2 жыл бұрын
It has been some time ago but from memory it was parallel to give maximum current.
@shagui
2 жыл бұрын
@@martint1151 Thank You Martin! Im making one 3D printed with a nema17. Maybe you might be interested.
@geenanackan8772
2 жыл бұрын
great video! what did you use to make the blades?
@martint1151
2 жыл бұрын
Hi , I purchased a portable wind turbine from Cutting Edge USA but disappointed with it (could not get and amps from it ) so I used the blades for this DIY one. You can get sets of blades from them on their Web site , need to scroll down several pages to find them. The ones I have are 9" long blades.
@mangjay80
3 жыл бұрын
Wow amazing
@MrBobWareham
2 жыл бұрын
Try Schottky diodes
@mafsal007
3 жыл бұрын
Do one thing add a motor to rotate that wind mill,,,,,
@jupitercyclops6521
2 жыл бұрын
I'm pretty sure the wind turns it. Besides, wouldnt that be counter productive? Read more Just kidding I know what u meant
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