Open-Network Weather Station Mk.2
Part 1: Introduction and hardware elements
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Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
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Components
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
Component list
Component List
191148-034-94
191148-035-94
Main Board no. 191148-1 v.1
Resistors
R1 = 1MΩ, carbon film, 5%, 0.25W, 250V
R2,R3 = 100kΩ, carbon film, 5%, 0.25W, 250V
R4 = 220kΩ, carbon film, 5%, 0.25W, 250V
R5,R6 = 2.2kΩ, carbon film, 5%, 0.25W, 250V
R7,R9 = 1kΩ, carbon film, 5%, 0.25W, 250V
R8 = 1.8MΩ, carbon film, 5%, 0.25W, 250V
Capacitors
C1 = 100µF, 25V, radial 2.5mm
C2 = 10µF, 16V, radial 5mm
Semiconductors
IC1 = MAX8212EPA+ voltage supervisor
LED1 = red, 3 mm
T1,T2 = FQP27P06X, -60V, -27A, 120W, Vgs=–4V, Rdson=70mΩ
T3,T4 = BS170, 60V, 500mA, 830mW, Vgs=2.1V, Rdson=1.2Ω
Miscellaneous
K1 = 2-way PCB screw terminal block, 0.2 in. (5.08mm) pitch, 630V
K2 = 3-way PCB screw terminal block, 0.15 in. (3.81mm) pitch, 300V
K3,K4,K7,K8 = 2-way PCB screw terminal block, 0.15 in. (3.81mm) pitch, 300V
IC1 = DIL-8 IC socket
MOD2= 17-way SIL pinheader socket, 0.1'' pitch
K5 = Micro SD card BoB, from Elektor Store *
K6,K10 = 4-pin SIL pinheader, snapoff, vertical
K9 = 5-pin SIL pinheader, snapoff, vertical
LCD1 = 2x16 character backlit LCD with I²C Backpack, from Elektor Store *
MOD1 = OKI-78SR-5/1.5-W36-C, 5V 1.5A DC/DC converter, (Murata)
MOD2 = ESP32 Pico KIT V4, from Elektor Store
MOD3 = Elektor RFM95 BoB (optional for future extension)
S1 = pushbutton switch, IP68, Alcoswitch PB6B2FM3M1CAL07
Case: TK PS 94×94×57 mm, IP66 class (Spelsberg)
2 pcs hex spacer M3×25mm
2 pcs M3 nut
2 pcs M3×10mm machine screw
2 pcs PG7 Cable Gland Nylon, IP68
6 pcs short jumper wire, female-female
PCB 191148-1 V1.2 from Elektor Store
* stock/shipping issues expected due to production and export issues.
Component List
191148-057-94
191148-058-94
Connector Board no. 191148-2
Resistors
R1,R2,R3 = 10kΩ, carbon film, 5%, 0.25W, 250V
Capacitors
C1,C2 = 10µF, 16V, radial 5mm (6.5mm height)
Semiconductors
IC1 = LP2950-33LPE3, 3.3V LDO, TO-92
Miscellaneous
MOD1 = BME280 BoB from Elektor Store
MOD2 = WSEN-PADS BoB (Würth)
K1 = 3-way PCB screw terminal block, 0.15 in. pitch (3.81mm), 300V
K2,K4 = RJ-11 modular connector, 6P6C, vertical, Molex type 95503-2661
K3,K5 = 2-way PCB screw terminal block, 0.15 in. (3.81mm) pitch, 300V
PCB 191148-2 V1.1 from Elektor Store
Component List
191148-062-94
191148-063-94
Dust/Particle Sensor Board no. 191148-3
MOD1 = Particulate Matter sensor type HPMA115S0-xxx (Honeywell), Farnell # 2770767
K1,K2 = 3-way PCB screw terminal block, 0.15 in. pitch (3.81mm), 300V
WR-PHD 8-way receptacle, 0.05 in (1.25mm) pitch, Würth Elektronik # 653008113322
2 pcs pre-crimped wires, Würth-Elektronik # 653153128130
3 pcs M2×10 machine screw
Case: TK PS 94×94×57 mm, IP66 class (Spelsberg)
PCB 191148-3 V1.0 from Elektor Store
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