Minimal Lenz Generator V2

[gyulasun]

Hi Norman, 

Thank you very much for doing and reporting this test. 

Wish you good health. 

Greetings 
Gyula

[kolbacict]

if you use a part from a hard disk as a pendulum? There is a suspension(axis), there is a coil, there is a magnet ...

[norman6538]

The bearing in the hard drive and also the VCR is hard to adapt whereas quick and dirty bike axles are easy to adapt and adjust.

I know because I have used the VCR bearing but not for a long pendulum where the least little bit of play will manifest itself.
See attached photo for how I adapted the front bicycle axle to make a pendulum. I wrapped  some sheet metal around the axle and gripped it tight with a nut and then the wood is screwed into that metal.  Out of the photo to the left is a front bicycle fork that holds the end of the axle. Since I repair bicycles I have lots of spare parts available.
My mistake was in using a 16 inch wheel axle instead of a 26 inch wheel which would have greater stability. If need be I can use 2 axles giving me the equivalent of a no sag fence gate hinge but don't have time right now.

Norman

[norman6538]

Today I got a better axle and reduced the mag/core gap thus reducing the swings and now the difference in swings with coil open/closed and metal/no  metal is 1-2 swings - around 7-9. I will retest to see if the numbers are valid and then report them.

Bad news for now. The coil does not generate enough voltage to allow a diode to give me oneway voltage/current so it will take a mechanical switch and I don't have time for that now unless my nightime brain wakes me up with a quick and dirty idea.

So my daytime curiosity brain came up with this.
Using a hand pressed micro switch because the pendulum swings slow enough to manually press the switch closing the coil in only 1 direction and 2 tests I got a difference of 1 both times.  So

A. coil closed approaching metal then coil - 9 swings.
B. coil closed approaching the coil then metal - 10 swings.
C. 9 swings with coil open.

Which I interpret to mean that the Lenz counter to motion force  is reduced with the metal on the leaving coil side. So we have quasi good news....

Norman 

Norman

[gyulasun]

Hi Norman, 

Thank you again for your kind efforts.  Regarding the " The coil does not generate enough voltage to allow a diode to give me oneway voltage/current"  problem, you may have germanium diodes in your junkbox? Or a germanium transistor used as a diode?  These Ge diodes have 50- 100 mV forward voltage drop only. Low barrier Schottky diodes have 150-200 mV forward voltage drop.   

Indeed your test results are promising.   

Greetings 
Gyula