Bill of material
Overview of parts
Mandatory
1. You need to have a Raspberry Pi Zero W (the W is for "Wireless Lan", there is also a non-W edition).
2. You need a microSD-Card to copy the Image to
3. You need a Power Supply or Battery delivering 5V/2A
Membrane Pump
It is necessary to use an air pump which is stabilized and has a known airflow or use an airflow meter. We tested with Thomas 1410V (12V - ~300€) or 2002 (3.3V - ~150€) Diaphragm Pumps.
The airflow is mandatory for correct calculation and has to be adjusted in the python script - we're happy to help you out here, just contact us.
Download 3D Printable files (A-E)
STL for 3D Printing (SLA or FDM) github repository - printing material ~10€
A-E:
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
- 3D printing service is more expansive (~$100)
Download PCB / Gerber Files for bcMeter 12V or 5V (F)
We have a small stock of PCBs available, just contact us, if interested.
(find gerber files for PCB fabrication on bcmeter.org) ~$25
bcMeter general purpose PCB for 12V and large pumps
bcMeter SMD PCB for 5V and smaller pumps
Bill of Material for general purpose PCB (THT components & 12V DC Barrel Jack) (G)
Link to mouser basket for one-click-order
| Mfr. No | Manufacturer | Description | Order Qty. | Price (EUR) | Ext.: (EUR) |
| 110991027 | Seeed Studio | Development Boards & Kits - ARM Seeed Rasp Pi Zero W Barebones Kit | 1 | 21,48 € | 21,48 € |
| MCP3426A6-E/MS | Microchip | Analog to Digital Converters - ADC 16bit deltasigma ADC dual channel 15sps | 1 | 2,35 € | 2,35 € |
| IRL 81A | Osram Opto Semiconductor | Infrared Emitters Infrared 850nm Half Angle +/-12DEG | 2 | 0,881 € | 1,76 € |
| LPT 80A | Osram Opto Semiconductor | Standard LEDs - SMD PHOTOTRANSISTOR | 2 | 0,762 € | 1,52 € |
| RCER72A103K0K1H03B | Murata | Multilayer Ceramic Capacitors MLCC - Leaded 0.01uF 100volts X7R LS=5mm +/-10% | 3 | 0,474 € | 1,42 € |
| TAP334M035SCS | AVX | Tantalum Capacitors - Solid Leaded 35V 0.33uF 20% ESR=1 5 Ohm | 2 | 0,551 € | 1,10 € |
| CON-SOCJ-2155 | Gravitech | DC Power Connectors Power Jack/Connector 2.1mm x 5.5mm | 1 | 1,01 € | 1,01 € |
| K102K15X7RF53H5G | Vishay | Multilayer Ceramic Capacitors MLCC - Leaded 50V 1nF 10% X7R e3 Auto | 3 | 0,313 € | 0,94 € |
| RDEC71E106K2M1H03A | Murata | Multilayer Ceramic Capacitors MLCC - Leaded 10uF 25volts X7S 10% | 1 | 0,864 € | 0,86 € |
| RDER71E104K0M1H03A | Murata | Multilayer Ceramic Capacitors MLCC - Leaded 0.1uF 25volts X7R 10 % | 2 | 0,398 € | 0,80 € |
| L7805CV | STMicroelectronics | Linear Voltage Regulators 5.0V 1.0A Positive | 1 | 0,567 € | 0,57 € |
| L7809CV | STMicroelectronics | Linear Voltage Regulators 9.0V 1.0A Positive | 1 | 0,415 € | 0,42 € |
| MMBT3904-G | Comchip Technology | Bipolar Transistors - BJT VCEO=40V IC=200mA | 1 | 0,186 € | 0,19 € |
| MBA02040C2261FC100 | Vishay | Metal Film Resistors - Through Hole .4watt 2.26Kohms 1% 1/8watt body size | 2 | 0,093 € | 0,19 € |
| CFR25SJT-26-10K | YAGEO | Carbon Film Resistors - Through Hole 10 kOhms 250 mW 5% - 350/ +500 PPM / C | 1 | 0,085 € | 0,09 € |
| OM1015E-R58 | Ohmite | Carbon Film Resistors - Through Hole 100 Ohm 1W 5% 500 Vo lt | 1 | 0,085 € | 0,09 € |
| 34,79 | |||||
Bill of Material for the small PCB (SMD, 5V) (G)
Link to Mouser Basket for one-click-order
| Mouser No | Mfr. No | Manufacturer | Description | Order Qty. | Price (EUR) | Ext.: (EUR) |
|---|---|---|---|---|---|---|
| 603-AC0805JRX7R9BB10 | AC0805JRX7R9BB103 | YAGEO | Multilayer Ceramic Capacitors MLCC - SMD/SMT 50V 0.01uF X7R 0805 5% AEC-Q200 | 3 | 0,26 € | 0,79 € |
| 603-CC805KRX7R9BB104 | CC0805KRX7R9BB104 | YAGEO | Multilayer Ceramic Capacitors MLCC - SMD/SMT 50V 0.1uF X7R 0805 10% | 2 | 0,11 € | 0,21 € |
| 603-CC805KRX7R9BB102 | CC0805KRX7R9BB102 | YAGEO | Multilayer Ceramic Capacitors MLCC - SMD/SMT 50V 1000pF X7R 0805 10% | 3 | 0,12 € | 0,37 € |
| 241-MMBT3904WR100001 | MMBT3904W_R1_00001 | Panjit | Bipolar Transistors - BJT /S1A/TR/7"/HF/3K/SOT-323/TRA/SOT/GPT-02TAN/GPT02-QI01/PJ/// | 1 | 0,14 € | 0,14 € |
| 720-IRL81A | IRL 81A | Osram Opto Semiconductor | Infrared Emitters Infrared 850nm Half Angle +/-12DEG | 2 | 0,91 € | 1,82 € |
| 720-LPT80A | LPT 80A | Osram Opto Semiconductor | Phototransistors PHOTOTRANSISTOR | 2 | 0,82 € | 1,65 € |
| 474-PRT-14017 | PRT-14017 | SparkFun Electronics | SparkFun Accessories Raspberry Pi GPIO Tall Header - 2x20 | 1 | 1,71 € | 1,71 € |
| 474-PRT-14275 | PRT-14275 | SparkFun Electronics | SparkFun Accessories Raspberry Pi GPIO Male Header - 2x20 | 1 | 0,83 € | 0,83 € |
| 279-CRGCQ0805F2K2 | CRGCQ0805F2K2 | TE Connectivity | Thick Film Resistors - SMD CRGCQ 0805 2K2 1% SMD Resistor | 2 | 0,23 € | 0,46 € |
| 279-CRGP0805F100R | CRGP0805F100R | TE Connectivity | Thick Film Resistors - SMD CRGP 0805 100R 1% SMD Resistor | 1 | 0,21 € | 0,21 € |
| 603-RC0805JR-0710KL | RC0805JR-0710KL | YAGEO | Thick Film Resistors - SMD 10 kOhms 125 mW 0805 5% | 1 | 0,09 € | 0,09 € |
| 579-MCP3426A2-E/SN | MCP3426A2-E/SN | Microchip | Analog to Digital Converters - ADC 16bit deltasigma ADC dual channel 15sps | 1 | 2,72 € | 2,72 € |
| 571-9-146274-0 | 9-146274-0 | TE Connectivity | Headers & Wire Housings 40P MODII .100CL HDR | 1 | 2,95 € | 2,95 € |
| 963-LMR212BD7106KG-T | LMR212BD7106KG-T | Taiyo Yuden | Multilayer Ceramic Capacitors MLCC - SMD/SMT 0805 10VDC 10uF 10% X7T AEC-Q200 | 1 | 0,37 € | 0,37 € |
| TOTAL | 11,469 | 14,32 € |
Filter Paper (H)
Pallflex T60A20 Filter Paper was used during developement and is sadly discontinued. We have a small stock of T60A20 left, so we may send you some material.
We're testing the better available https://www.amazon.com/7194-Non-Heat-Pallflex-Tissuquartz-Laboratory/dp/B0731SG18R.
Or you may send us a sample of your filter paper and we happily calibrate bcMeter with it!
Amazon Links for additional Material (I)
Component locations on PCB
See on Assembly#Component_locations