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small generator 8 lighting 11 W Hg Bulb

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sciencetoolbar:
small generator 8 - simple generator homemade lighting 11 W Hg Bulb
2 coils - 40 ohms each, Dc motor 4 V, neodymyum sphere 26 mm, 3,7 V baterry 2000 mAh
For construction details do not hesitate to contact us.
https://www.youtube.com/watch?v=KErVBeGeUOE

thx st

dieter:
Nice design, but as can be heard, the motor goes down in RPM as the coil generates current.


But this may be a good way to find a spot and orientation, in which the RPM remains high while the bulb is lit. At least easy to try.

sciencetoolbar:
we are looking to improve it, we are interestead for an aplication regarding the magnetic flux generated by the rotating sphere.
thx st
https://youtu.be/Y5p6oamAMZM

conradelektro:
If it is a science project to show in principle how a generator (dynamo) works, it may be makes sense.

But if you consider the losses:

- may be 60% efficiency of the Motor
- may be 40% efficiency of the Generator

will give you about 20% to 30% overall efficiency.

A Joule Thief type circuit might give you 80% efficiency and no moving parts (which will wear out). I have some Joule Thief type circuits running since years.

I am not Advertising Joule Thiefs, but as home made things go, they are simple and they work.

One could drive a 1 W power LED from one 1.5 V battery with this component (up to 90% efficiency):

http://pdf1.alldatasheet.com/datasheet-pdf/view/391955/MICROCHIP/MCP1623T-I/CHY.html
http://pdf1.alldatasheet.com/datasheet-pdf/view/552869/MICROCHIP/MCP1640BT.html
https://www.highlight-led.de/highpower-led-1w-warmweiss-typ-wtn-1w-90ww.html

Greetings, Conrad

sciencetoolbar:
I consider it an improved dynamo, it can generate a lot of power regarding the small dimensions.....in theory it can light a car bulb on a bicycle
https://youtu.be/4p35IsZWfNQ
it is generating the power nedeed in a single position.
We will improve it....
thx
st

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