Difference between revisions of "Assembly"

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(Wiki update: sync with manual and dev docs (2026-03))
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'''Requirements (not pictured):
#REDIRECT [[Device assembly]]
# Screwdriver
#  Solder Iron
#  Solder
#  Flux
#  3D Printer / 3d printing service
 
'''
 
[[File:Overview.jpg|500px|left]]<br clear=all>
 
Overview:
 
A: Upper Case<br>
 
B: Lower Case<br>
 
C: Intake manifold<br>
 
D: LED/Sensor holder<br><br>
 
E: LED/Sensor holder<br><br>
 
F: PCB (Order from pcbway.com, jlcpcb.com  or anywhere else (you will get 5 PCBs (minumum) for ~$20 with fast shipping) – find gerber files on github repository or bcmeter.org)<br>
 
G: Components from mouser.com or anywhere else  (~60) – [https://www.mouser.de/ProjectManager/ProjectDetail.aspx?AccessID=0f6a28fa20 mouser shopping cart] or [[bill of material]]
 
H: Order filter papers (~$50) – Pack of 50 sufficient for at least 1000 samples. Type TBD, tested with T60A20 – ask local labs for availability<br>
 
I: Additional material:<br>
 
* Hot Glue ~$7
* Rubber band (SHORE A) for sealing ~$11
* M3 Screws ~$3
* M3 threads ~$7
* microSD Card (4gb+)
40 Pin Header (optional for plug the Hat)
J: Order membrane pump (~$160) - here (TBD – cheaper solution may be available soon)
 
STL for 3D Printing (SLA or FDM) attached. Print on any 3d printer or send to any service provider. Use black filament / resin. If possible, use flex filament or mix resin with flex resin.
200g Resin / FDM ~ $5-$10<br>
 
 
 
 
[[File:Bcmeter-general-purpose-case.jpg|500px|left]]<br clear=all>
 
Assembly Instructions<br>
 
Current version is designed for absolute simplicity so as little as possible SMD components and parts with large footprints are used. Start assembling by soldering the smalles parts first (MMBT3904 + MCP3426). Then add THT passive parts piece by piece according to description on the PCB and the BOM.
 
 
# Place IRL81A (IR Emitter) and LPT80A (Sensor) in adapters D and E, seal with hot glue and solder wires to the corresponding vias on the PCB. Long leg is anode (positive). [[File:Sensor-emitter-brackets.jpg|thumb|left]]<br clear=all>
# Place adapters D and E in the case A and B. Emitter to top case. Seal with (hot) glue or tape. [[File:Brackets-in-lower-case.jpg|thumb|left]]<br clear=all>
# Put pump in place and do a test run for leakage. [[File:Pump.jpg|thumb|left]]<br clear=all>

Latest revision as of 15:10, 8 March 2026

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