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4 layers55 × 30 mmCurrent measure, the printed circuit board in 3D

nA current meter for master class

Size
55 × 30 mm
Copper layers
4
Thickness
1.6 mm
Parts
59
Nets
69
Pads
204
Tracks, vias
279, 98
Pours
14
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
15 Oct 2025
Updated
1 Feb 2026

Overview

Current measure is an open-source printed circuit board by Luk9091, from the Luk9091/Analog_dithering repository on GitHub. It is a 4-layer board of 55 × 30 mm with 59 parts on 69 nets, routed with 279 tracks and 98 vias.

It is built around the OPA350UA, ISO6521D and MIC5365-3.3YD5-TR, with the MBR1020VL and SI2319CDS among its other parts. Its parts include 23 capacitors, 14 resistors, 7 ICs, 5 connectors and 4 diodes. It belongs with the STM32 boards of this library.

Main components

5

Parts

59
QtyValueFootprintReferences
10100nCapacitor_SMD:C_0805_2012MetricC5, C7, C10, C11, C12, C13, C17, C18, C20, C23
41kResistor_SMD:R_0805_2012MetricR1, R3, R11, R12
31uCapacitor_SMD:C_0805_2012MetricC4, C14, C22
20.1µCapacitor_SMD:C_0805_2012MetricC8, C16
2100Resistor_SMD:R_0805_2012MetricR2, R9
210uCapacitor_SMD:C_0805_2012MetricC3, C21
22kPotentiometer_THT:Potentiometer_Bourns_3296Z_HorizontalRV1, RV2
24.7kResistor_SMD:R_0805_2012MetricR13, R14
24.7uCapacitor_SMD:C_0805_2012MetricC2, C15
2LEDLED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolderD3, D4
2MBR1020VLDiode_SMD:D_SOD-123FD1, D2
10.1uCapacitor_SMD:C_0805_2012MetricC1
11.62MResistor_SMD:R_0805_2012MetricR8
110Resistor_SMD:R_0805_2012MetricR7
1100kResistor_SMD:R_0805_2012MetricR5
110kResistor_SMD:R_0805_2012MetricR6
110nCapacitor_SMD:C_0805_2012MetricC19
119.1kResistor_SMD:R_0805_2012MetricR4
1220Resistor_SMD:R_0805_2012MetricR10
122nCapacitor_SMD:C_0805_2012MetricC6
14.7µCapacitor_SMD:C_0805_2012MetricC9
18MHzCrystal:Resonator_SMD_Murata_CSTxExxV-3Pin_3.0x1.1mmY1
1Conn_01x02Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_VerticalJ2
1Conn_01x04Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_VerticalJ6
1Conn_01x04_PinConnector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_VerticalJ1
1Conn_02x03_Counter_ClockwiseConnector_PinSocket_2.54mm:PinSocket_2x03_P2.54mm_VerticalJ5
1INA186Package_TO_SOT_SMD:SOT-363_SC-70-6_HandsolderingU2
1ISO652Package_SO:SOIC-8_3.9x4.9mm_P1.27mmU3
1MIC5365-3.3YD5Package_TO_SOT_SMD:TSOT-23-5_HandSolderingU1
1OPA333xxDBVPackage_TO_SOT_SMD:SOT-23-5_HandSolderingU7
1OPA333xxDBVPackage_TO_SOT_SMD:SOT-23-5U4
1OPA350Package_SO:SOIC-8_3.9x4.9mm_P1.27mmU5
1STM32G431C8TxPackage_QFP:LQFP-48_7x7mm_P0.5mmU6
1SW_PushButton_Switch_SMD:SW_SPST_PTS647_Sx38SW1
1Screw_Terminal_01x02TerminalBlock:TerminalBlock_Xinya_XY308-2.54-2P_1x02_P2.54mm_HorizontalJ3
1Si2319CDSPackage_TO_SOT_SMD:SOT-23Q1
1SolderJumper_3_OpenJumper:SolderJumper-3_P1.3mm_Open_Pad1.0x1.5mmJP1

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Questions

How big is the Current measure PCB?

It measures 55 × 30 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Current measure use?

59 parts, built around the OPA350UA, ISO6521D, MIC5365-3.3YD5-TR and MBR1020VL. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Current measure KiCad files?

From the Luk9091/Analog_dithering repository on GitHub, at the commit this page was made from: the board is Schematic/current_measure.kicad_pcb and its schematic Schematic/current_measure.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Current measure design in my own project?

Its repository states no licence, so its author keeps all rights: ask Luk9091 before reusing the design.