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Current logger

hnz1102·current-logger·hardware/currentlogger.kicad_pcb

Current logger PCB layout, top view — open source ESP32 board by hnz1102
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About the Current logger PCB

Current logger is an open source ESP32 PCB design by hnz1102, published on GitHub. It is a 2-layer board measuring 50 × 70 mm, with 64 components from 36 distinct parts.

Its main chip is the ESP32-C3-WROOM-02-N4, from the ESP32 family. Other key parts include the INA228, SPX3819M5-L, MCP73831-2-OT and SSD1331_DISPLAY. By type, the board carries 24 resistors, 14 connectors, 9 capacitors, 5 ICs, 5 switches and 4 diodes.

It belongs with the power & battery, iot & wireless and test & measurement designs in this gallery.

From the project

This tool provides a logging function that gets data on voltage, current and power consumption. Voltage input range is from 0 to 85V, Maximum current input is 15A.

This tool provides a logging function that gets data on voltage, current and power consumption. Voltage input range is from 0 to 85V, Maximum current input is 15A.

High-resolution - By using Texas Instruments INA228 IC - 20-bit delta-sigma ADC, It can be got measurement data with 195.uV Bus voltage and 163.84mV Shunt voltage.

Microcontroller on board - No need for a client PC when you are measuring. Directly send to the server.

Current logger, from the project README
From the project README

Main components on the Current logger

ESP32-C3-WROOM-02-N4INA228SPX3819M5-LMCP73831-2-OTSSD1331_DISPLAY

Current logger bill of materials (BOM)

64 components, 36 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-C3-WROOM-02-N4
U101
1
INA228
U102
1
SPX3819M5-L
U103
1
MCP73831-2-OT
U104
1
SSD1331_DISPLAY
U105
1
IRF7606TRPBF
IRF7606PBF
Q101
3
USB4105-GF-A
USB_C_Receptacle_USB2.0_5077CR
J101, J201, J202
5
PINOUT
J102, J203, J206, J208, J211
1
LiPo BATTERY
J104
1
USB_B_Mini
J204
1
USB_A
J205
1
SCREW_TERMINAL_01X03
Screw_Terminal_01x03
J207
1
BATTERY OUT JST_PH
J209
1
BATTERY IN JST_PH
J210
1
SOLDERJUMPER_2_OPEN
SolderJumper_2_Open
JP101
2
TS-06104
SW101, SW102
2
SW_Push_LED
SW103, SW104
1
SLIDE_SW
SW105
2
LED RED
D101, D102
1
LED GREEN
D103
Show 16 more
QtyPartRefs
1
NSR0340HT1G
D104
1
MH2029-601Y
BK2125HS601-T
FB101
4
0.1UF
0.1uF
C101, C102, C104, C105
2
10UF
10uF
C103, C106
2
1UF
1uF
C107, C109
1
4.7UF
4.7uF
C108
7
10K
R101, R102, R103, R108, R109, R110, R111
1
10M
10m
R104
3
10K
R105, R121, R122
3
20K 1%
R106, R116, R117
1
12K 1%
R107
1
2K
R112
1
1K
R113
4
330
R114, R115, R119, R120
1
100K
R118
2
5.1K
R123, R124

Current logger design files

The KiCad project lives in the hnz1102/current-logger repository on GitHub; these links point at the commit this page was built from.

Current logger: common questions

What microcontroller does the Current logger use?

The Current logger is built around the ESP32-C3-WROOM-02-N4, from the ESP32 family.

How big is the Current logger PCB?

The Current logger measures 50 × 70 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Current logger?

64 components, from 36 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Current logger design files?

From the hnz1102/current-logger repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

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

The repository has no license, so all rights stay with hnz1102. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Current logger without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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