Hello The Crucible community,
So after soldering the wires on my BT909 module, I checked for continuity errors with the voltmeter/multimeter. Between the red and the other wires, no continuity.
Between the two blue also no continuity. But between the black and the both blue, I got continuity. So i de-soldered the black and blues, re-soldered them and again continuity between black and rx & black and tx. Is this normal ?
First photo was taken with my cheap microscope. I think my re-soldering is horrible but I donât know how to fix it.
Also in âgreat wisdomâ I decided to use blue wires for both Rx & Tx. I will find which is which with the voltmeter but what would happen if I solder them wrong on the Proffie board? Can it be changed in the config file ?
Thank you for any help.
You should know RX on PB goes to TX on module and TX on PB goes to RX on module.
Additionally, continuity between GND and the data lines doesnât necessarily mean a problem, and moreover if you power it on them being shorted to GND wonât damage anything, it just wonât work, so no harm done worst case.
Thanks, yes I know that tx from Bluetooth goes to rx on Proffie and rx from BT goes to tx on Proffie but if I swap them can the rx and tx on Proffie be changed in the setup of the Proffie ? Good point on the âif short to GNDâ.
I am trying to do all the wiring to all the accessorie. Once all the modules (OLED, BT, buttons, batterie, speaker, NPXL connector & battery polarity fixer board) are done and all the wires are only sticking out from the Proffie board slot, that is when I will start soldering things to the Proffie.
I guess I should probably start with speaker, battery & button 1 to see if it even will turn on ?
Speaking of buttons, is it even worth trying to save this one ? The pins keep on breaking when I try to insert it in itâs slot with the wires soldered to it.
No, those kind of buttons are cheap, buy a bag of new ones.
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Yes cheap, but also really weak. They go in the slot fine on their own but once the wires are attached, they bend or break rather than going in. I filed the slots but they still get stuck half way. Do you know how are they called (other than tactile switch) so I can search where to order more & how to install them. Or maybe you have a link for them. Thank you for your time.
Thank, So I better make sure I donât mess them up.
Usually flat tactile are âsurface mount (SM orSMD)â and come in sizes by millimeter. Or they get labeled âmicroswitchesâ
I usually buy a snack pack (meaning a mix) like:
Cool. Thanks, unfortunately I will need to add 25$/⏠for delivery to Malta. No free delivery with Amazon to Malta (only Amazon.it or .de will deliver here for a fee). I found a pack of 200 black micro switches (variety pack) at a local seller. They are much thicker so I will need to carve a bit more in the chassis. I just want this chassis to be assembled (and working) so I can start experimenting with Proffie, sound fonts and blades profiles.
Malta! I love how sabers bring us together. I think the closest Iâve been is Mikonos 
If you get switches with a high button top you can sand them down. Itâs just plastic in many cases.
That is a good idea, will keep it in mind. Unfortunately the switches I found have a thicker base. The smallest ones are 6x6x4.3 mm, much different than the flat brass ones. At least that is one switch down. 1 more to go and I still have one flat brass switch. A bit of filing the opening to make sure it fits without breaking.
That is the one I decided to use to replace the broken one.
Malta is a bit isolated when it comes to sabers/Star Wars. I only found 1 small Star Wars Facebook group with 80ish members. They have not been active since 2023 and it was about some pictures of a cosplay con. I only know 3 people IRL here that are interested in Star Wars, most are âI have never seen Star Warsâ, at least they heard of it!
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I solved the GND continuity issue on the Bluetooth module, I added a bit of flux on the solder and gently tapped them with the iron. Now no more continuity between TX-GND & RX-GND.
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Nice ! I think people use these in a lot of printed chassis, if they donât have a pcb:
âLow Profileâ style
Ha, I think most of us here have seen Star Wars 
. A spectrum of fans that go from âhave you seen the latest thing!?â to âthatâs cool but I saw it in 1977 about 25 times in the theater so Iâll pass on the new stuffâ 
But the lightsaber binds us like the force.
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You can also find them cheap on AliExpress. hereâs one of the sources I use. Iâm guessing youâll have better shipping options from China than from amazon.
50PCS 4x4mm Height From 1.5mm To 4.3mm Momentary Metal Tact Push Button Switch SMT 4PIN Key Button - AliExpress 13
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