2 layers68 × 110 mm
4 layers98.7 × 44.7 mm
NanoLogger
TobiasNetzer/nanoLoggerHere is a simplified block diagram of the data logger. To measure the current of a device, the data logger is simply connected in series between the voltage source and the DUT/load.
- Size
- 98.7 × 44.7 mm
- Copper layers
- 4
- Thickness
- 1.53 mm
- Parts
- 221
- Nets
- 150
- Pads
- 708
- Tracks, vias
- 1,091, 240
- Pours
- 51
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Aug 2025
- Updated
- 17 Aug 2026
Overview
NanoLogger is an open-source printed circuit board by TobiasNetzer, from the TobiasNetzer/nanoLogger repository on GitHub. It is a 4-layer board of 98.7 × 44.7 mm with 221 parts on 150 nets, routed with 1,091 tracks and 240 vias.
It is built around the ATSAMD51G18A-MF, OPA189ID and SN6505BDBV, with the TPS62290DRV, LMV761MF and SN74AHC1G04DBV among its other parts. Its parts include 79 resistors, 70 capacitors, 23 ICs, 16 diodes and 16 transistors. It belongs with the SAM D and SAM boards of this library.
Main components
12
ATSAMD51G18A-MF
QFN-48-EP(7x7)-40℃~+125℃ 1.71V~3.63V 120MHz 128KB 12bit 12bit 256KB 32 Bit 37 ARM Cortex-M4F Built-in FLASH QFN-48-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
OPA189ID
SOIC-8-18V~-2.25V、2.25V~18V -40℃~+125℃ 1 1.7mA 140pA 14MHz 168dB 20V/us 3uV 4.5V~36V 5.2nV/√Hz@1kHz 5nV/℃ 65mA 70pA EMI filtering/RF suppression、Zero drift / auto-zero、ESD protection、Reverse-phase input protection Rail-to-rail output SOP-8 Precision Op Amps ROHSTexas InstrumentsPrecision Op Amps
SN6505BDBV
SOT-23-6-55℃~+125℃ 1.56mA 160mΩ 16V 1A 2.25V~5.5V SOT-23-6 Transformer Drivers ROHSTexas InstrumentsPower Management - Specialized
TPS62290DRV
WSON-6-EP(2x2)-40℃~+85℃@(TA) 1 15uA 1A 2.25MHz 2.3V~6V 600mV~6V Adjustable Buck Buck Built-in Yes WSON-6-EP(2x2) DC-DC Converters ROHSTexas InstrumentsDC-DC ConvertersLMV761MF
SOT-23-6-40℃~+125℃ 0.001pA 0.2pA 1 100dB 120ns 2.7V~5.25V 200uV 300uA 5.5V Enable/shutdown function Push-pull TTL、CMOS SOT-23-6 Comparators ROHSTexas InstrumentsComparators
SN74AHC1G04DBV
SOT-23-5-40℃~+85℃ 1 1 1.5V~3.85V 1uA 2V~5.5V 500mV~1.65V 7.5ns@5V,50pF 74AHC 8mA 8mA 噪声抑制功能 SOT-23-5 Inverters ROHSTexas InstrumentsInvertersSN74AHC1G02DBV
SOT-23-5-40℃~+85℃ 1 1.5V~3.85V 1uA 2 2V~5.5V 3.8V 440mV 500mV~1.65V 7.5ns@5V,50pF 74AHC Series 8mA 8mA NOR Gate SOT-23-5 Logic Gates ROHSTexas InstrumentsLogic Gates
ADUM4160BRW
SOIC16WFull/Low Speed 5 kV USB Digital IsolatorAnalog DevicesUncategorised
ISL21080CIH315Z-TK
SOT-23-40℃~+85℃@(Ta) 1.5V 1.5uA 2.7V~5.5V 30uVp-p 50ppm/℃ 52uVrms 7mA Fixed Series ±0.5% SOT-23 Voltage Reference ROHSRenesas ElectronicsVoltage ReferenceLP2981IM5X-5.0
SOT-23-5-40℃~+150℃@(Tj) 1 100mA 18V 20uA 5V 70dB@(1kHz) 85mV@(100mA) Fixed Over Current Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
PS2533L-1-F3-A
DIP-4Transistor, Photovoltaic Output OptoisolatorsRenesas ElectronicsSN74AHC1G32DBV
SOT-23-5-40℃~+85℃ 1 1.5V~3.85V 1.9V、2.48V、3.8V 1uA 2 2V~5.5V 440mV 500mV~1.65V 6.5ns@5V,50pF 74AHC Series 8mA 8mA OR Gate SOT-23-5 Logic Gates ROHSTexas InstrumentsLogic Gates
README
README.mdBlock Diagram
Here is a simplified block diagram of the data logger. To measure the current of a device, the data logger is simply connected in series between the voltage source and the DUT/load.
The current flow creates a small voltage drop across the selected shunt resistor, which is amplified by a factor of 100. The output voltage is then measured by the microcontroller's internal ADC. A change of the current range is also observed by the microcontroller, to correctly convert the measured current.
An external trigger signal can optionally be connected. This allows to start the measurement on a rising or falling edge. Perfect to always have the same starting point of a measurement, for example when the DUT enters active mode.
Status LEDs provide the user with information about the device's current state/mode, for example: logger in standby mode, or data recording in progress.
The captured data is buffered internally in the microcontroller and then transferred to a PC via an isolated USB 2.0 interface.
Hardware
I've written a very detailed explanation as part of the project documentation. You can read more about it here if you are interested in the design aspects and my thoughts behind them. This is also where you can find all the schematics and technical drawings. The documentation was however written in German.
Parts
221| Qty | Value | Footprint | References |
|---|---|---|---|
| 33 | 100nF | nanoLogger:Capacitor_0402 | C3, C4, C10, C14, C20, C21, C22, C24, C26, C28, C36, C37, C38, C39, C40, C41 +17 |
| 14 | 68R | nanoLogger:Resistor_0402 | R38, R39, R40, R41, R42, R43, R44, R45, R46, R47, R49, R51, R53, R55 |
| 11 | 1PS79SB30 | nanoLogger:SOD523 | D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16 |
| 10 | 10k | nanoLogger:Resistor_0402 | R8, R11, R14, R48, R50, R52, R54, R56, R60, R66 |
| 9 | 1nF | nanoLogger:Capacitor_0402 | C45, C54, C55, C56, C57, C58, C59, C60, C61 |
| 9 | DMN6040SFDE | nanoLogger:UDFN2020-6_Type-E | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9 |
| 8 | 100R | nanoLogger:Resistor_0402 | R72, R73, R74, R75, R76, R77, R78, R79 |
| 7 | 22pF | nanoLogger:Capacitor_0402 | C11, C43, C44, C50, C51, C52, C53 |
| 6 | 10µF | nanoLogger:Capacitor_0603 | C2, C8, C12, C19, C23, C27 |
| 5 | 1k | nanoLogger:Resistor_0402 | R13, R15, R18, R21, R59 |
| 5 | 2N7002T | nanoLogger:SOT-523 | Q12, Q13, Q14, Q15, Q16 |
| 4 | 24R | nanoLogger:Resistor_0402 | R4, R5, R6, R7 |
| 4 | LMV761 | nanoLogger:SOT-23-6 | U12, U13, U14, U15 |
| 4 | MountingHole_M3 | nanoLogger:MountingHole_M3 | H1, H2, H3, H4 |
| 4 | SN74AHC1G04 | nanoLogger:SOT-553 | U16, U17, U18, U23 |
| 3 | 1k5 | nanoLogger:Resistor_0402 | R17, R20, R23 |
| 3 | 1µF | nanoLogger:Capacitor_0603 | C16, C17, C18 |
| 3 | 2k8 | nanoLogger:Resistor_0402 | R16, R19, R22 |
| 3 | SN74AHC1G02 | nanoLogger:SOT-553 | U20, U21, U22 |
| 3 | Wuerth_150044M155260 | nanoLogger:LED_0404 | D3, D4, D5 |
| 2 | 10k 0.05% | nanoLogger:Resistor_0402 | R24, R25 |
| 2 | 10nF | nanoLogger:Capacitor_1206 | C1, C35 |
| 2 | 12pF | nanoLogger:Capacitor_0402 | C32, C33 |
| 2 | 15k | nanoLogger:Resistor_0402 | R61, R67 |
| 2 | 1k 0,05% | nanoLogger:Resistor_0402 | R34, R37 |
| 2 | 2.2µF | nanoLogger:Capacitor_0603 | C13, C15 |
| 2 | 24k | nanoLogger:Resistor_0402 | R63, R69 |
| 2 | 2k2 0,05% | nanoLogger:Resistor_0402 | R32, R35 |
| 2 | 36k | nanoLogger:Resistor_0402 | R64, R70 |
| 2 | 5k1 | nanoLogger:Resistor_0402 | R2, R3 |
| 2 | 6k8 0,05% | nanoLogger:Resistor_0402 | R33, R36 |
| 2 | 750k | nanoLogger:Resistor_0402 | R65, R71 |
| 2 | 7M5 | nanoLogger:Resistor_0402 | R62, R68 |
| 2 | 8pF | nanoLogger:Capacitor_0402 | C30, C31 |
| 2 | MBR0520L | nanoLogger:SOD-123 | D1, D2 |
| 2 | MMBTH10L | nanoLogger:SOT-23 | Q10, Q11 |
| 2 | MountingHole_M2 | nanoLogger:MountingHole_M2 | H5, H6 |
| 2 | OPA189 | nanoLogger:SOT-23-5 | U9, U10 |
| 2 | PinHeader_2_54mm_2pol_smd | nanoLogger:PinHeader_Male_2_54mm_2pin_smd | J3, J4 |
| 1 | 100R 0,05% | nanoLogger:Resistor_0805 | R27 |
| 1 | 100k | nanoLogger:Resistor_0402 | R58 |
| 1 | 100m 0,1% | nanoLogger:Resistor_CSM2512 | R29 |
| 1 | 100pF | nanoLogger:Capacitor_0402 | C34 |
| 1 | 10R 0,05% | nanoLogger:Resistor_0805 | R28 |
| 1 | 10k | nanoLogger:Resistor_0805 | R57 |
| 1 | 10k 0,05% | nanoLogger:Resistor_0805 | R26 |
| 1 | 10m 0,1% | nanoLogger:Resistor_CSM2512 | R30 |
| 1 | 10nF | nanoLogger:Capacitor_0402 | C29 |
| 1 | 10µF | nanoLogger:Capacitor_1206 | C70 |
| 1 | 10µH | nanoLogger:Inductor_0603 | L4 |
| 1 | 182k | nanoLogger:Resistor_0402 | R10 |
| 1 | 1M | nanoLogger:Resistor_1206 | R1 |
| 1 | 1R | nanoLogger:Resistor_0402 | R12 |
| 1 | 2.2µH | nanoLogger:LPS3015 | L2 |
| 1 | 220R | nanoLogger:Resistor_0805 | R31 |
| 1 | 300R 3A | nanoLogger:Inductor_0805 | L1 |
| 1 | 4.7µF | nanoLogger:Capacitor_0603 | C25 |
| 1 | 600R | nanoLogger:Inductor_0402 | L3 |
| 1 | 820k | nanoLogger:Resistor_0402 | R9 |
| 1 | ABM10W-48MHZ | nanoLogger:Abracon_ABM10_2.5x2.0mm | Y1 |
| 1 | ABS06-32.768K | nanoLogger:Abracon_ABS06 | Y2 |
| 1 | ADUM4160 | nanoLogger:SOIC-16W | U2 |
| 1 | ATSAMD51G18A-M | nanoLogger:VQFN-48 | U7 |
| 1 | ISL21080CIH315Z-TK | nanoLogger:SOT-23 | U8 |
| 1 | LP2981IM5X-5.0 | nanoLogger:SOT-23-5 | U5 |
| 1 | PS2533L-1-F3-A | nanoLogger:DIP-4 | U11 |
| 1 | SN6505B | nanoLogger:SOT-23-6 | U3 |
| 1 | SN74AHC1G32 | nanoLogger:SOT-553 | U19 |
| 1 | SWD Header | nanoLogger:SAMTEC_FTSH-105-XX-X-DV | J2 |
| 1 | TPS60400 | nanoLogger:SOT-23-5 | U6 |
| 1 | TPS62290 | nanoLogger:SON-6 | U4 |
| 1 | USBLC6-2P6 | nanoLogger:SOT-666 | U1 |
| 1 | USB_Type_C_Receptacle | nanoLogger:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | Wuerth_750315371 | nanoLogger:Transformer_Wuerth_750315371 | TR1 |
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Questions
How big is the NanoLogger PCB?
It measures 98.7 × 44.7 mm and has 4 copper layers, 1.53 mm thick.
What parts does the NanoLogger use?
221 parts, built around the ATSAMD51G18A-MF, OPA189ID, SN6505BDBV and TPS62290DRV. 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 NanoLogger KiCad files?
From the TobiasNetzer/nanoLogger repository on GitHub, at the commit this page was made from: the board is nanoLogger/nanoLogger.kicad_pcb and its schematic nanoLogger/Current_Sensing.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the NanoLogger design in my own project?
Its repository states no licence, so its author keeps all rights: ask TobiasNetzer before reusing the design.