iSpindel 25 Degree Calibration in Pure Water 

Thank you so much for your support 😁 I'll be releasing a 1,000 subscriber video soon (I'm a little late to the party I know). Have a great weekend Travis.

Open Source Distilling you to man stay safe out there🤙

Nice! I love hearing solutions like this. Simple and effective. Thanks for sharing!

Nice! A new board will be coming out soon with solder pads on top that do just this! I just build a prototype last week and it went very smoothly. It doesn't take much solder to adjust the degrees in water :) Thanks for watching!

You are not the first one to ask this. I did it as seen in the video and everything appears to be working fine. I don't see how doing it your suggested way would cause an issue, flatter should be better. There doesn't seem to be a general consensus on if it's bad or not.

I thought the same thing. Just leaving the lid off for this part of the calibration seems the obvious option.

@@MichaelCoates The lid isn't the problem, there is a lip underneath the lid that's part of the tube. You would need to hang the lid area off the side of the table/countertop. But I think the flatter the better. I think it's a good idea.

Hi there, In my opinion the answer is yes it ought to matter - but it is taken care of thanks to an imperfect centre of gravity so the error is cancelled out along the way. Here goes. So the iSpindel calibration "advice" is to lay the iSpindel flat (incl lip) with the accelerometer uppermost and "flat". Now if you have aligned the accelerometer with the central cylinder axis of the pelting then it will be off horizontal slightly because of the lip we are discussing. So we calibrate to horizontal and call that 90 deg. Now if you were to roll the pelting around 180 you would expect the tilt to still measure 90 deg but because of the lip the error is now doubled. On one occasion I got nearer 92 deg. So based on this so far I'd say it does matter. The accelerometer is not calibrated to the horizontal correctly. But... There'e always a but. When the iSpindel is laying in liquid its going to rotate around and settle with one "side" face up always - every time - because the centre of gravity won't be aligned down the axis of the cylinder. As the SG changes the iSpindel tilt changes but the "error" we built in via our calibration will be consistent (more of an offset than an error) because the iSpindel will always rotate in the liquid until the cylinder axis is heavy side down. You could put a mark of some sort to check - or make a mental note of the PCB orientation each time. So now you're going to calibrate the SG against tilt in a sugar solution or whatever your method is anyway and create a polynomial that will caculate out that offset and all will be well with your iSpindel. If the centre of gravity of the iSpindel down the cylinder axis was perfect and it could settle in any rotation then YES this error would matter and we should be taking the lip into account. But the centre of gravity is not perfect. So we are ok. So long as you are diligent with your tilt to SG calibration method and allow the iSpindel to settle for each reading the error due to the lip will always be in the same orientation and be dealt with via tilt to SG calibration. Andy.

Shopping list found in the link below. www.opensourcedistilling.com/ispindel/

Make sure you check out the HomebrewTalk.com link on my blog post. I link to a post where a guy adds weights wrapped in tape. Maybe a combination of the two solutions would work better? Good luck and let me know how it works out.

Check wight of your battery. On good scale. I think it should be 44gr or so (its printed on PCB , I'm not exactly sure).

@DnnyNY, Yes the CherryPhilip 4.0 PCB states 44 grams on it. When I was troubleshooting with CherryPhilip he said, "The iSpindel-pcb work fine with Samsung 30Q battery or with a battery with 48gr weight." My batteries all weigh 48 grams. I suppose with a lighter battery the tilt should be higher in water.

@@OpenSourceDistilling hmm . I never tried to use other battery. I got stash of used laptop 18650, weigh them all and choose 44g only. Build 5 of those and have no problems to calibrate with small washer and double sided tape.

@@OpenSourceDistilling also thank you a lot for you videos. Always like !!!

Not yet but I"m currently calibrating 4 iSpindels in fermenting sugar wash as I type. The sugar water calibration video get done in the future as well. Thanks for watching!

Nice!

I used the web browser app with address 192.168.4.1

@@OpenSourceDistilling ah thanks, did not realize the d1 mini has its own little web server, very cool

@@OpenSourceDistilling ordered a 10 pack of your pcb's, thanks man, would rather build a few myself than pay $140 for one tilt

It's true! They are much cheaper and if you love to tinker then the iSpindel is for you :)