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(Update: V1/V2 naming, remove ESP32/Pi distinction) |
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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 (V1) == | |||
| | |||
[[File:bcMeter_parts.jpg|thumb|none|800px]] | |||
== Mandatory Components == | |||
# '''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) | |||
''Populated PCBs are available — contact jd@bcmeter.org.'' | |||
== 3D Printed Case == | |||
STL files for 3D Printing (SLA or FDM): [https://github.com/bcmeter/bcmeter/tree/main/stl 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 [[Best practices#Supported Filter Papers|Supported Filter Papers]] for correction factors. | |||
Send a sample of your filter paper to jd@bcmeter.org for calibration. | |||
== Additional Material (~75 EUR) == | |||
{| class="wikitable" | |||
! 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 == | ||
{| class="wikitable" | |||
! 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 [https://github.com/bcmeter/bcmeter GitHub]. | |||
== 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
Overview of Parts (V1)
Mandatory Components
- 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)
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.