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Random slightly cool stuff you built but not worth its own thread, thread


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Posted

Was cobbling up an RF field strength meter, so blobbed this up:

image.png.1d248f36f4bfa2e0e9f454f1d2bc98bc.png

but it was deaf as a post.

I figured out that the junk shop meter is open circuit. I guess someone put more than 100uA through it at some point

image.thumb.png.d6733463d7e351e1582cef5bb7173d90.png

I dragged out the microscope, but I couldn't see any burst wires on the coil,

Though at 0.063mm, I'd be unlikely to be able to repair it :-)

image.png.477d4a4f086d2ab00323aedf084de232.png

 

edit: amusingly, it later looked like the steel spring had been cooked, the 0.063mm wire copper wire outlasted it!

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  • 4 weeks later...
Posted
3 hours ago, h4nd said:

Nice, how you gonna insulate it?

I am going to use that 50mm ceramic fiber board and a layer of high temperature refractory cement in the bottom and a layer of board in the roof and then a layer of Kawool under the arched roof cover. actually thinking about it someone gave me some of the 25mm board.

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  • 2 weeks later...
Posted

So I used that to make an updated version of a 'Solar Engine' - saves solar up in a cap, turns on for a moment when there's a worthwhile store of energy (think cat toy motor, enviro monitor etc)

20250921_213258.thumb.jpg.ca11a38c2bf1f7102f3130f335162c0d.jpg

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