Difference between revisions of "Bill of material"

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{{Note|1='''Legacy V1 Documentation''' — This page documents the bill of materials for the bcMeter V1. The current V2 platform uses a different PCB design.}}


== Overview of parts ==
== Overview of Parts (V1) ==
[[File:Overview.jpg|500px|left]]


<br clear=all>
[[File:bcMeter_parts.jpg|thumb|none|800px]]


== Mandatory ==
== Mandatory Components ==
1. Raspberry Pi 3A or Zero 2 W <br/>
2. MicroSD Cardo<br/>
3. Power Supply 5.25V/2A <br/>
4. Air Pump


== Download 3D Printable files (A-E) ==
# '''bcMeter Pi Hat''' — Order prepopulated (~95 EUR) or build your own from PCB + components (~5 EUR per PCB for 10+ on JLCPCB or similar)
# '''Raspberry Pi 3A or Zero 2 W''' (~35 EUR)
# '''MicroSD Card''' (~10 EUR)
# '''Power Supply 5.25V/2A''' (~15 EUR)
# '''Air Pump''' (~10–200 EUR depending on type)


STL for 3D Printing (SLA or FDM) [https://github.com/bcmeter/bcmeter/tree/main/stl github repository]  - printing material<br>
''Populated PCBs are available — contact jd@bcmeter.org.''


<br>''Use black filament / resin. FDM is prone to leakage if not properly set up. If possible, mix resin with flex resin.''<br>
== 3D Printed Case ==


== Download PCB / Gerber Files for bcMeteror 5V ==
STL files for 3D Printing (SLA or FDM): [https://github.com/bcmeter/bcmeter/tree/main/stl GitHub repository] — printing material ~10 EUR.
find gerber files for PCB fabrication on [https://github.com/bcmeter/bcmeter/tree/main/gerbers bcmeter.org]) <br>


===== We have a stock of populated PCBs available, just [https://bcmeter.org/#contact contact] us, if interested. =====
Use black filament/resin. FDM is prone to leakage if not properly configured. If possible, mix resin with flex resin.


== Filter Paper ==


[[File:Bcmeter-smd.jpg|300px|alt=bcMeter SMD PCB for 5V and smaller pumps|bcMeter SMD PCB for 5V and smaller pumps]]
AE33 filter paper is standard for bcMeter. Any filter paper with a known scattering factor can be used. See [[Best practices#Supported Filter Papers|Supported Filter Papers]] for correction factors.
bcMeter SMD PCB for 5V and smaller pumps


Send a sample of your filter paper to jd@bcmeter.org for calibration.


== Additional Material (~75 EUR) ==


== Filter Paper (H) ==
{| class="wikitable"
We're using AE33 filter Paper with bcMeter. You can use any filter which scattering factor is know. <br>
! Description !! Quantity !! Approx. Price
You may send us a sample of your filter paper and we happily calibrate bcMeter with it!<br>
|-
We can also provide you with a small amount of filter paper to get started.
| 22 AWG Wire || 1 || $10
 
|-
| Hot Glue || 1 || $7
|-
| Rubber Band (SHORE A) for sealing || 1 || $13
|-
| Silicone Hose (5mm ID) || 1 || $5
|-
| M3 Screws || 1 set || $7
|-
| M3 Threaded Inserts || 1 set || $7
|-
| MicroSD Card 16GB || 1 || $8
|}


== Amazon Links for additional Material (I) ==  
== Key PCB Components ==


{| {{table}}
{| class="wikitable"
| align="center" style="background:#f0f0f0;"|'''Description'''
! Component !! Description !! Approx. Price
| align="center" style="background:#f0f0f0;"|'''Quantity'''
| align="center" style="background:#f0f0f0;"|'''Price'''
| align="center" style="background:#f0f0f0;"|'''Link'''
|-
| 22AWG Wire||1||$9.99 ||https://www.amazon.com/NorthPada-Electronic-Electrical-Tinned-Voltage/dp/B08979VWP5/ref=sr_1_15?dchild=1&keywords=22+awg+wire&qid=1626014422&sr=8-15
|-
|-
| Hot Glue||1||$6.99||https://www.amazon.com/Baffo-Adhesive-Project-Craftwork-Diameter/dp/B07XC3VJRH/ref=sr_1_8?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=hot+glue+black+sticks&qid=1626014378&refresh=1&sr=8-8
| '''U1''' MCP3428 || 4-Channel ADC || €6
|-
|-
| Rubber Band||1||$12.95||https://www.amazon.com/Neoprene-Rubber-Black-Self-Adhesive-Sponge/dp/B00EE9HTPW/ref=sr_1_10?dchild=1&keywords=Rubber+Shore+A+tape&qid=1626014507&sr=8-10
| '''D1/D2''' IRL81A || IR LEDs (880nm) || €2
|-
|-
| Silicone Hose||1||$3.99||https://www.amazon.com/Silicone-Vacuum-Hose-Performance-Black/dp/B07792YB15/ref=sr_1_14?dchild=1&keywords=silicone+hose+5mm&qid=1626014620&sr=8-14
| '''J1''' Omron D6F || Airflow Sensor || €50
|-
|-
| m3 Threads||1||$12.59||https://www.amazon.com/iplusmile-Embedment-Threaded-Printing-Projects/dp/B087NBYF65/ref=sr_1_43?dchild=1&keywords=m3+screw+threads&qid=1626014698&sr=8-43
| '''U2''' LM1117 || Voltage Regulator || €1
|-
|-
| M3 Phillips Screw||1||$7.29||https://www.amazon.com/uxcell-Stainless-Phillips-Machine-Combine/dp/B07P3ZJN2K/ref=sr_1_18?dchild=1&keywords=m3+screws+8mm&qid=1626014873&sr=8-18
| '''U3''' SHT4x || Humidity/Temp Sensor || €4
|-
|-
| M3x8mm Hex Screws||1||$8.49||https://www.amazon.com/uxcell-M3x8mm-Thread-Button-Socket/dp/B01B1OD62C/ref=sr_1_3?dchild=1&keywords=m3+screws+8mm&qid=1626014812&sr=8-3
| '''Pump''' D15S PWM || Membrane Pump || €95
|-
|-
| SanDisk 16GB 3-Pack||1||$17.48||https://www.amazon.com/SanDisk-3-Pack-microSDHC-Memory-3x16GB/dp/B089DPCJS1/ref=sr_1_11?dchild=1&keywords=microSD+Card&qid=1626014929&refinements=p_36%3A1253503011&rnid=386442011&s=pc&sr=1-11
| Capacitors, resistors, connectors || Various || ~€20
|-
|
|}
|}


== Component locations on PCB ==
Full BOM with exact product numbers available at [https://github.com/bcmeter/bcmeter GitHub].
See on [[Assembly#Component_locations|Assembly#Component_locations]]
 
== PCB / Gerber Files ==
 
Gerber files for PCB fabrication: [https://github.com/bcmeter/bcmeter/tree/main/gerbers GitHub]
 
Two PCB variants exist:
* '''SMD PCB''' — For 5V and smaller pumps. More compact, recommended.
* '''THT PCB''' — For 12V and larger pumps. Easier to assemble but less accurate.
 
== Current Platform (V2) ==
 
The current bcMeter V2 uses a different hardware design:
 
* '''ADS1220''' 24-bit ADC (replaces MCP3428)
* '''Integrated microcontroller''' (replaces Raspberry Pi)
* '''Internal flash storage''' (replaces microSD)
* '''Optional:''' SIM7080G LTE-M modem, AT6668 GPS, SPS30 PM sensor
 
For current device information, see [[Introduction]].

Latest revision as of 15:21, 8 March 2026

Template:Note

Overview of Parts (V1)

BcMeter parts.jpg

Mandatory Components

  1. bcMeter Pi Hat — Order prepopulated (~95 EUR) or build your own from PCB + components (~5 EUR per PCB for 10+ on JLCPCB or similar)
  2. Raspberry Pi 3A or Zero 2 W (~35 EUR)
  3. MicroSD Card (~10 EUR)
  4. Power Supply 5.25V/2A (~15 EUR)
  5. Air Pump (~10–200 EUR depending on type)

Populated PCBs are available — contact jd@bcmeter.org.

3D Printed Case

STL files for 3D Printing (SLA or FDM): GitHub repository — printing material ~10 EUR.

Use black filament/resin. FDM is prone to leakage if not properly configured. If possible, mix resin with flex resin.

Filter Paper

AE33 filter paper is standard for bcMeter. Any filter paper with a known scattering factor can be used. See Supported Filter Papers for correction factors.

Send a sample of your filter paper to jd@bcmeter.org for calibration.

Additional Material (~75 EUR)

Description Quantity Approx. Price
22 AWG Wire 1 $10
Hot Glue 1 $7
Rubber Band (SHORE A) for sealing 1 $13
Silicone Hose (5mm ID) 1 $5
M3 Screws 1 set $7
M3 Threaded Inserts 1 set $7
MicroSD Card 16GB 1 $8

Key PCB Components

Component Description Approx. Price
U1 MCP3428 4-Channel ADC €6
D1/D2 IRL81A IR LEDs (880nm) €2
J1 Omron D6F Airflow Sensor €50
U2 LM1117 Voltage Regulator €1
U3 SHT4x Humidity/Temp Sensor €4
Pump D15S PWM Membrane Pump €95
Capacitors, resistors, connectors Various ~€20

Full BOM with exact product numbers available at GitHub.

PCB / Gerber Files

Gerber files for PCB fabrication: GitHub

Two PCB variants exist:

  • SMD PCB — For 5V and smaller pumps. More compact, recommended.
  • THT PCB — For 12V and larger pumps. Easier to assemble but less accurate.

Current Platform (V2)

The current bcMeter V2 uses a different hardware design:

  • ADS1220 24-bit ADC (replaces MCP3428)
  • Integrated microcontroller (replaces Raspberry Pi)
  • Internal flash storage (replaces microSD)
  • Optional: SIM7080G LTE-M modem, AT6668 GPS, SPS30 PM sensor

For current device information, see Introduction.

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