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Tell me where to find the part - micro generator

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Good afternoon, masters and addicts!

For a project to school, together with his son, they decided to use the energy of a wheel driven by two proteins to supply air to a single small aquarium for one fish.

The first thing that came to mind was to adapt the “dynamo” from the designer, but it’s heavy to swing, squirrels cannot move the wheel ((

I decided to buy a small generator, implying that there should be less force on the axis rotation. But here's the problem, I can’t find a store on the Internet where such parts are sold!
In the search, the offer on Aliexpress immediately pops up, but the deadlines are tight, on New Year's the parcel will go a very long time.

Can anyone tell me where to buy this?

to understand what I'm talking about, a couple of pictures

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First make a minipump on an economical engine (type RF-300TA). Take from the CD-ROM drive. And use the already existing mechanical transmission (deceleration). Attach the crank to the membrane with the valve on the last gear. Measure the current when the device is operating with a hose in water. Hence there will be requirements for the generator.
Take the motor generator to an increased voltage of ~ 9 ... 12V. Preferably with a pulley (or gear). If the squirrel will spin its wheel
~ 1 rpm. (~ 60 rpm), then it is necessary to the generator shaft (~> 360 rpm). Those. transmission (acceleration) ~ 6.
And it is advisable to add an intermediate buffer - battery. Between a generator and a pump motor.
0
Reply To quote A complaint
Dial on YouTube the generator from the sd drive.
+1
Reply To quote A complaint
Better yet, protein-stepper-battery-motor-pump
+1
Reply To quote A complaint
about a motor as a generator


As my physics teacher used to say, “The electric machine is universal!” ... Any motor is a generator, any generator is a motor! ))) (In some, simply, there will be no self-excitement ... But if you "light it up" - everyone will work!))).
Nobody will produce an industrial generator of such a size, specially “tuned” to work as a generator, of course ... Yes, and the efficiency in this case will increase by some “millionths of a penny,” which in no way at all not noticeable ...
.. It’s another matter that an electric transmission has a rather low efficiency precisely in connection with a low generator efficiency! They put it on BelAz not from a good life, but simply because it is difficult to make a cardan that does not wrap itself in a spiral, moving from the place of five hundred tons on a rubber run.)))) ...
In your case, you need a serious boost gearbox to convert torque to power at the output of the generator ....
... I think it’s easier to make a pulley and a long drive belt to the crank of the pump ...
+1
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The transmission is not very big losses ... I put one motor on the wheel of the bicycle, and the other on the steering wheel. Turnovers on the generating unit need considerable to earn another ...

Better mechanically. Crank, piston (or membrane), valve.
+1
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The engine is called a stepper (if I didn’t mess up anything). The internet is full of examples. look as an example. And your protein will play the role of a spin engine. But you still need to look at what characteristics of the pump and at what speed the engine will spin the protein. Probably need to put the gear.
Author 0
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Thank you all for your answers.
But I'm confused ...
I thought a generator (about which I asked) to give electricity to a motor that would pull the pump membrane.
And if the three of you talk about the motor as a generator - what are the next steps ?!
+1
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As I saw the photo, I immediately thought about the old CD drive, it has just such an engine.
+1
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You are advised to take a DC electric motor with magnets. At 12 ... 24V. There are such in inkjet printers, in CD drives, etc. And it is also desirable to have an accompanying transmission (gear or pulley), because you need revs higher than the squirrel
And you also need to consider which pump you want to install (parameters)? There you need a certain power ... Will the proteins scroll?
+1
Reply To quote A complaint
In any cooler there are such engines. In hard drives, too, in CD drives. In general, it is easier to use any small motor (stator - magnet)

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