Component List Picoammeter
Resistors
(All TH, 5%, 0.25 W, unless diff. noted)
R1, R18, R19, R24 = 1 kΩ
R2, R9 = 1 MΩ, 1%
R3 = 1 GΩ, 1%
R4, R5 = 1 MΩ
R6 = 560 Ω
R7 = 50 kΩ, trimmer (*)
R8 = 10 kΩ
R10 = 1.5 MΩ, 1%
R11 = 120 kΩ, 1%
R12 = 100 Ω, 1%
R13 = 10 kΩ, 1%
R14, R15, R23, R28 = 100 kΩ, 1%
R16 = 27 kΩ
R17 = 4.7 kΩ
R20, R22 = 33 kΩ
R21 = 2k Ω, trimmer (*)
R24 = 1 kΩ
R25 = 0 Ω
R26 = 10 MΩ
R27 = 22 kΩ, trimmer (*)
R29 = 470 Ω
R30, R31 = 100 Ω
(*) Vishay T93XA series, multi-turn cermet
Capacitors
C1 = 100 pF, SMD 1206, film or NP0
C2 = 10 µF, SMD 1206, X7R
C4, C6…C11 = 100 nF, SMD 1206, X7R
C2 = 10 µF, SMD 1206, X7R
Semiconductors
D1 = BAV199, SMD (optional)
D2, D3 = 1N4148, TH type
IC1, IC2 = LMC6482, DIL
IC3 = DG412DJN, DIL
IC4 = ADS1113, adapter PCB SMD to DIL
IC5 = DAC8830, adapter PCB SMD to DIL
IC6 = TL431C, TO92
Q1, Q2 = 2N7000, N-ch. MOSFET
Modules
ESP32 = NodeMCU ESP32 WiFi and Bluetooth
(i.e., Reichelt, order no. DEBO JT ESP32)
OLED = 0.96" OLED SSD1306 Display I2C 128 × 64
(i.e., AZ-Delivery)
Miscellaneous
JP1…JP6, JP13 = header 1 × 1 pin, female, 90°
JP12 = header 1 × 4 pin, female, 90°
JP7 = header 1 × 2 pin, female, 90°
JP8, Jp9 = header 1 × 15 pin, female, 90°
JP10, JP11 = header 1 × 3 pin, female, 90°
K1, K2 = COTO_9011-05-11, relay
Component List Power Supply
Resistors
(All TH, 1%, 0.25 W, unless diff. noted)
R1, R2 = 33 Ω, 5%
R3 = 470 Ω
R4, R5 = 2.2 kΩ
R6 = 1.2 kΩ
R7 = 68 kΩ
R8 = 6.8 kΩ
Capacitors
C1 = 1µF, 50V, X7R
C2, C3 = 100 µF, 25V, d = 10 mm
C4, C5 = 100 n, SMD 1206
Semiconductors
D1, D2 = BAT42, TH type
IC1 = LM337, TO92
IC2 = LM317, TO92
Miscellaneous
M1 = MT3608, DC/DC step-up converter
JP1 = header 1 × 1 pin, male, 90°
JP2 = header 2 × 2 pin, male, 90°
JP3, JP4 = header 1 × 3 pin, male, 90°
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