iSpindle - DIY Electronic Hydrometer

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DuncB

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Well the FLIR camera was quite revealing wish I'd done it before.
Battery side
flir_20220502T112404.jpg all is okay.

But flipped over quite different.
flir_20220502T112453.jpg IMG_20220502_112535.jpg IMG_20220502_112809.jpg

I'm going to swap out this board and I think we'll see a difference.

I've been running a micro heater in the test water!
 

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DuncB

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Swapped the gyro out and put a new one in and the picture tells a different story.

flir_20220502T140723.jpg The bright bit at the bottom is just the shiny pad for adding solder weight too if needed.
Expect battery decay to be back to normal.
 

mper

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@mper
I have a good wifi signal as it's connecting to a repeater and has a signal of about 60.
Something not right for sure, I've watched it and the blue light only flashes at the interval the timing is set to. It's now at 3.76V and started at 4.13 less than 24 hours ago.
I'll get it out of the petling and take a picture with my FLIR camera and see if there's a hot spot. Reload the latest firmware and have a really good look at all the solder points to see if I can spot a problem.
good you found the problem
 

DuncB

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@DuncB You have an IR camera?!?!
Yes a CAT 62 mobile phone, designed for builders, electricians house insulators etc. I use it at work for assessing blood flow in skin during and after some operations. Also good for assessing burn depth.
It is also good for finding dog in the dark/fog. Covid screening handy as well.
 

Dr_Jeff

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I ferment under pressure.
My PRV is ~25psi has anyone fermented at that high a pressure?
Will the device leak?
Does anyone with experience foresee any issues or is there anything special I might need to do?
 

DuncB

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Have been fermenting many times at that pressure and a little above. I did have one sink but it dried out okay and worked fine.
I do now use the Orings mentioned by me somewhere above now and don't get problems at all. I put a little bit of silicone grease on the top edge of the petling when I tighten it and then back it off and tighten again.
Not gone much above 30psi except by accident.

Tell tale you have a problem is if you suddenly see that the gravity is falling rapidly again when it should have finished. Liquid getting in makes it float more vertical. A really strong magnet ie hard disk drive type will attract an Ispindel and can support it if you think it's sinking.
 
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