What did you build today (Pictures) ?

[executivul]

Depending on the number of simultaneously active relays and the weemos tx power requirements make sure you don't overheat the HLK module, fire hazzard.
My 8 relay board draws a whooping 500ma @5V when all of them are active.

[bjacobse]

@gohan thanks I didn't think of the RF transmission from Wemos should impact PIR sensor, I only have thought of the power ripple. how far distance should affect PIR? I think mine is approx 2 cm apart

[bjacobse]

@executivul
Good point, But I have looked at the power/current budget.
I have 4 pcs relay, JQC-3FF 5V DC, spec: https://www.futurlec.com/Relays/JQC-3FF-05.shtml uses 0,36W each x 4 pcs = total 1,44W.
Usage of Wemos D1 Mini Pro is unknown, at least there is no spec...https://wiki.wemos.cc/products:d1:d1_mini_pro#documentation let says it uses 1 W
HLK01 is rated to provide 3W
Should be all ok

[mfalkvidd]

@bjacobse I had problems with ~3-4cm. Lots of false triggers on the pir. But if you are not experiencing false triggers your setup is probably fine.

More info: https://forum.mysensors.org/post/78771

[bjacobse]

@mfalkvidd Thanks for the link to the post, I think I should upgrade and use aluminium foil as you done to make a GND shield around the PIR sensor

[dbemowsk]

So I have uploaded the 3D design files for my MySensors gateway case to thingiverse for anyone that is interested.
https://www.thingiverse.com/thing:2904969
I have included the OpenSCAD file used to generate the .stl files. I would be interested in seeing posts of other makes or remixes of the design.

[NeverDie]

@dbemowsk Nice work!

Now that I finally own a 3D printer, I can't believe I waited so long to get one. I encourage anyone who doesn't yet have a 3D printer to get one too. Sharing enclosure files in addition to PCB designs is the next level.

[bjacobse]

@neverdie I can only agree - to buy ans use a 3D printer is really good and some fun too

[alexsh1]

@neverdie how are you getting on with setting the printer up? I have been struggling with the correct setting for some time with problems like the plastic would stick to the surface even though it is pre-heated. At the end I got really frustrated and retuned the printer. I am using www.3dhubs.com now if I need to print anything.

[dbemowsk]

@alexsh1 What brand/model of printer were you using? Also, what type of plastic were you trying to print with?

[NeverDie]

@alexsh1 said in What did you build today (Pictures) ?:

@neverdie how are you getting on with setting the printer up? I have been struggling with the correct setting for some time with problems like the plastic would stick to the surface even though it is pre-heated. At the end I got really frustrated and retuned the printer. I am using www.3dhubs.com now if I need to print anything.

It's working like a dream with both PLA and PETG, which are the only plastics I've tried thus far. I'm using the Prusa I3 MK3 (Prusa's 4th generation 3D printer). Following dbemowsk's suggestion, I'm now using Octoprint, running on a Raspi3b, which is mostly useful for uploading print files and monitoring from a distance using a webcam. Honestly, though, once it gets past the first layer, I haven't had any failures, so the webcam probably isn't needed at all.

[alexsh1]

@dbemowsk I was using PLA. The printer was the most popular model on Amazon.
That's the one:

https://www.amazon.co.uk/Wanhao-i3-V2-Duplicator-3D-Printer/dp/B01LWL4CTY/ref=sr_1_11?s=industrial&ie=UTF8&qid=1526325539&sr=1-11&keywords=3d+printer

[dbemowsk]

@alexsh1 Strange, that looks like a pretty decent printer.

[NeverDie]

@alexsh1 You can buy PEI print beds as an add on for most printers. Maybe that might have helped your issue. When printing PLA, I print a 5mm brim on the first layer, and that keeps the print object from prematurely dislodging later. Haven't needed a brim though when printing PETG, which just naturally bonds very strongly to the PEI print bed.

If there are going to be failures, they'll probably happen in the first layer. Once you get beyond that, it's smooth sailing.

[alexsh1]

@neverdie said in What did you build today (Pictures) ?:

If there are going to be failures, they'll probably happen in the first layer. Once you get beyond that, it's smooth sailing.

That's exactly what happened. The first layer simply would not stick to the surface. Especially, if it is, say, a larger project box. For small items - no problem.

I must admit I did not spend too much time on this. I tried it for a week and then just returned it. Too much trouble for occasional prints I do.

[alexsh1]

@dbemowsk It is a good printer I suppose. I only used PLA and just did not spent too much time trying to find the right settings. Given that a few prints I ordered were also warped at the first run, I concluded that this is still at the DIY stage.
I'll probably get a printer when technology is going to be more advanced.

[dbemowsk]

@alexsh1 NO problem. I realize they are not for everyone.

[vladimir]

Finally, I can join this discussion!
Today I drew a scheme of my first device! This is a system to protect against water leakage. I also posted it in the "hardware" section. Link.

[sundberg84]

A temp-node on 2xAA. Also a sneak-peak on EasyPCB rev 10...

https://youtu.be/TxzvhG4uo9I

[bjacobse]

@sundberg84 Which microscope are you using, looking 8:07 into your video?