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.
We recommend using the 5V PCB. The 12V is good enough but the 5V pcb is more advanced
(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