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 recommend using the 5V PCB. The 12V is meant to be soldered by absolute beginners but is less accurate. the 5V pcb is more advanced but harder to assemble.
(find gerber files for PCB fabrication on bcmeter.org) ~$25
We have a small stock of PCBs available, just contact us, if interested.
bcMeter SMD PCB for 5V and smaller pumps
Bill of Material for the small PCB (SMD, 5V) (G)
Link to Mouser Basket for one-click-order
| Mouser No | Mfr. No | Manufacturer | Description | RoHS | Order Qty. | Price (EUR) | Ext.: (EUR) | Position on PCB of bcMeter | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 279-CRGCQ0805F100R | CRGCQ0805F100R | TE Connectivity | Thick Film Resistors - SMD CRGCQ 0805 100R 1% SMD Resistor | RoHS Compliant By Exemption | 2 | 0,26 € | 0,51 € | R3 R4 |
| 2 | 603-RC0805FR-074K7L | RC0805FR-074K7L | YAGEO | Thick Film Resistors - SMD 4.7 kOhms 125 mW 0805 1% | RoHS Compliant By Exemption | 2 | 0,10 € | 0,19 € | R7 |
| 3 | 603-RC0805FR-072K21L | RC0805FR-072K21L | YAGEO | Thick Film Resistors - SMD 2.21 kOhms 125 mW 0805 1% | RoHS Compliant By Exemption | 2 | 0,10 € | 0,19 € | R1 R2 |
| 4 | 603-RC0805FR-07470RP | RC0805FR-07470RP | YAGEO | Thick Film Resistors - SMD 470Ohms 1/8W 0805 1% | RoHS Compliant By Exemption | 1 | 0,21 € | 0,21 € | R6 |
| 5 | 781-SI2318DS-GE3 | SI2318DS-T1-GE3 | Vishay | MOSFET 40V 3.9A 1.25W 45mohm @ 10V | RoHS Compliant | 1 | 0,55 € | 0,55 € | Q5 |
| 6 | 187-CL21B104KACNNNC | CL21B104KACNNNC | Samsung Electro-Mechanics | Multilayer Ceramic Capacitors MLCC - SMD/SMT 100nF+/-10% 25V X7R 0805 | RoHS Compliant | 2 | 0,10 € | 0,19 € | C2 C12 |
| 7 | 771-MMBT3904VL | MMBT3904VL | Nexperia | Bipolar Transistors - BJT TRANS BIPOLAR | RoHS Compliant | 2 | 0,11 € | 0,21 € | Q3 Q4 |
| 8 | 710-875115644009 | 875115644009 | Wurth Elektronik | Aluminium Organic Polymer Capacitors WCAP-PSHP 35V 10uF 20% ESR=75mOhms | RoHS Compliant | 2 | 0,77 € | 1,54 € | C9 C14 |
| 9 | 667-10SVP4R7M | 10SVP4R7M | Panasonic | Aluminium Organic Polymer Capacitors 10volts 4.7uF ESR 240mohm | RoHS Compliant | 1 | 1,30 € | 1,30 € | C1 |
| 10 | 603-CC805KRX7R8BB103 | CC0805KRX7R8BB103 | YAGEO | Multilayer Ceramic Capacitors MLCC - SMD/SMT 25V 0.01uF X7R 0805 10% | RoHS Compliant | 2 | 0,11 € | 0,23 € | C8 C11 |
| 11 | 603-CC805KKX7R8BB105 | CC0805KKX7R8BB105 | YAGEO | Multilayer Ceramic Capacitors MLCC - SMD/SMT 25V 1uF X7R 0805 10% | RoHS Compliant | 2 | 0,24 € | 0,48 € | C3 C13 |
| 12 | 603-AC805KRX7R9BB102 | AC0805KRX7R9BB102 | YAGEO | Multilayer Ceramic Capacitors MLCC - SMD/SMT 50V 1000pF X7R 0805 10% AEC-Q200 | RoHS Compliant By Exemption | 3 | 0,19 € | 0,57 € | C4 C7 C10 |
| 13 | 710-151031VS06000 | 151031VS06000 | Wurth Elektronik | Standard LEDs - Through Hole WL-TMRC THT Mono Diffusd Rnd3mm BrtGn | RoHS Compliant | 1 | 0,16 € | 0,16 € | D1 |
| 14 | 720-IRL81A | IRL 81A | ams OSRAM | Infrared Emitters Infrared 850nm Half Angle +/-12DEG | RoHS Compliant | 2 | 1,01 € | 2,02 € | D2 D3 |
| 15 | 485-374 | 374 | Adafruit | Adafruit Accessories DS18B20 Digital Temperature Sensor | RoHS Compliant | 1 | 3,75 € | 3,75 € | J8 |
| 16 | 279-CRGCQ0805J10K | CRGCQ0805J10K | TE Connectivity | Thick Film Resistors - SMD CRGCQ 0805 10K 5% SMD Resistor | RoHS Compliant By Exemption | 1 | 0,19 € | 0,19 € | R5 |
| 17 | 855-M20-9774046 | M20-9774046 | Harwin | Headers & Wire Housings 40 SIL VERTICAL PIN HEADER TIN | RoHS Compliant | 1 | 1,40 € | 1,40 € | J1 J2 J3 J4 J5 |
| 18 | 710-61304021821 | 61304021821 | Wurth Elektronik | Headers & Wire Housings WR-PHD DUAL SCKT HDR 2.54MM | RoHS Compliant | 1 | 1,82 € | 1,82 € | J6 |
| 19 | 863-NCP1117ST33T3G | NCP1117ST33T3G | onsemi | LDO Voltage Regulators 3.3V 1A Positive | RoHS Compliant | 1 | 0,65 € | 0,65 € | U1 |
| 20 | 579-MCP3426A0TE/SN | MCP3426A0T-E/SN | Microchip | Analog to Digital Converters - ADC 16-bit delta-sigma ADC dual chan 15sps | RoHS Compliant | 1 | 3,25 € | 3,25 € | U2 |
| Merchandise: | 19,41 € |
Bill of Material for general purpose PCB (THT components & 12V DC Barrel Jack) (G)
bcMeter general purpose PCB for 12V and large pumps. We recommend using the 5V PCB. The 12V pcb is meant to be soldered by absolute beginners but is less accurate. the 5V pcb is more advanced but harder to assemble.
Link to mouser basket for one-click-order
| Mfr. No | Manufacturer | Description | Order Qty. | Price (EUR) | Ext.: (EUR) |
|---|---|---|---|---|---|
| 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 | 0,88 € | 1,76 € |
| LPT 80A | Osram Opto Semiconductor | Standard LEDs - SMD PHOTOTRANSISTOR | 2 | 0,76 € | 1,52 € |
| RCER72A103K0K1H03B | Murata | Multilayer Ceramic Capacitors MLCC - Leaded 0.01uF 100volts X7R LS=5mm +/-10% | 3 | 0,47 € | 1,42 € |
| TAP334M035SCS | AVX | Tantalum Capacitors - Solid Leaded 35V 0.33uF 20% ESR=1 5 Ohm | 2 | 0,55 € | 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 | 0,31 € | 0,94 € |
| RDEC71E106K2M1H03A | Murata | Multilayer Ceramic Capacitors MLCC - Leaded 10uF 25volts X7S 10% | 1 | 0,86 € | 0,86 € |
| RDER71E104K0M1H03A | Murata | Multilayer Ceramic Capacitors MLCC - Leaded 0.1uF 25volts X7R 10 % | 2 | 0,40 € | 0,80 € |
| L7805CV | STMicroelectronics | Linear Voltage Regulators 5.0V 1.0A Positive | 1 | 0,57 € | 0,57 € |
| L7809CV | STMicroelectronics | Linear Voltage Regulators 9.0V 1.0A Positive | 1 | 0,42 € | 0,42 € |
| MMBT3904-G | Comchip Technology | Bipolar Transistors - BJT VCEO=40V IC=200mA | 1 | 0,19 € | 0,19 € |
| MBA02040C2261FC100 | Vishay | Metal Film Resistors - Through Hole .4watt 2.26Kohms 1% 1/8watt body size | 2 | 0,09 € | 0,19 € |
| CFR25SJT-26-10K | YAGEO | Carbon Film Resistors - Through Hole 10 kOhms 250 mW 5% - 350/ +500 PPM / C | 1 | 0,09 € | 0,09 € |
| OM1015E-R58 | Ohmite | Carbon Film Resistors - Through Hole 100 Ohm 1W 5% 500 Vo lt | 1 | 0,09 € | 0,09 € |
| Merchendise | 13,31 € |
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