Extendable Environmental Monitoring System
publishes data on IoT platforms
Gerber file
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Component list
Component List
Illustration 190297-021-94
Illustration 190297-022-94
Resistors
R1 = 47Ω
R2-R5 = 330Ω
R6 = 3.3kΩ
R7-R12 = 4.7kΩ
R13 = 5.6kΩ 1%
R14-R18 = 10kΩ
R19-R22 = 27kΩ
R23,R24,25 = 100kΩ
R26 = 470kΩ*
R27,R28 = 1.5MΩ 1.6kV (e.g. Vishay HVR2500001504JA100)*
R29,R30 = 4.7MΩ 1.6kV (e.g. Vishay VR25000004704FA500)*
R31 = 10MΩ 1.6kV (e.g. Vishay VR25000001005FA500)*
P1,P2 = trimmer 10kΩ (e.g. Vishay T73YU103KT20)
Capacitors
C1,C2,C3 = 330pF NP0/COG
C4-C14 = 22nF 250V film capacitor (e.g. Epcos B32529C3223J000)
C15-C18 = 100nF X7R
C19A,C20A = 100nF 630V film capacitor (e.g. Epcos B32671P6104K000)*
C19B,C20B = 100nF X7R 1.5kV (e.g. Kemet C2225C104KFRACTU)*
C21,C22 = 100μF 25V
C23 = 220μF 16V, low ESR
Inductor
L1 = 47µH, radial (e.g. Würth Elektronik 744 772 047 0)
Semiconductors
D1,D2 = 1N4148
D3-D13 = BAV21
D14,D15 = 1N5819-B
D16,D17,D18 = SA5.0A
LED1 = LED 3mm red
T1-T5 = BC547B
T6,T7 = 2N7000
T8 = IRLD110PBF*
IC1 = ICM7555
IC2 = CD4093N
IC3 = P82B715P
IC4 = Step-down regulator Vin 8-28V, Vout 5V, 1A, Würth Elektronik 173 010 578
Miscellaneous
BZ1 = Sound transducer (e.g. Loudity LD-BZEG-1205/3)
F1 = polyfuse 500mA (e.g. Littlefuse 60R050XPR)
K1: DC socket 2.1/5.5mm (e.g. Ninigi PC-GK2.1)
K2: 2-way PCB screw terminal block, 5mm pitch
MOD1A,MOD1B,MOD2 = 20-way pin socket, 0.1'' pitch, bottom entry (e.g. Würth Elektronik 613 020 157 21)
S1,S2,S3 = pushbutton (e.g. C&K Components D6R10LFS)
SENSOR1-SENSOR3 = RJ45 jack (e.g. Molex 85503-5001)
LCD 2x16 alphanumeric module, I2C, Raystar Optronics RC1602B5-LLH-JWV
ESP32 devkitC with header pins
For G-M tube: 2× 5mm fuse holder clip
(*) see article text.
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