HardLabs

LCRmeter

ironiron·LCRmeter·LCRmeter_PCB/lcrmeter.kicad_pcb

LCRmeter PCB layout, top view — open source STM32 board by ironiron

About the LCRmeter PCB

LCRmeter is an open source STM32 PCB design by ironiron, published on GitHub under the MIT license. It is a 2-layer board measuring 64 × 55.3 mm, with 68 components from 34 distinct parts.

Its main chip is the STM32G473C_B-C-E_Tx, from the STM32 family. Other key parts include the TPS2116DRLR, 74LVC1G66, OLED, 74HC14 and MCP6001-OT. By type, the board carries 25 resistors, 14 capacitors, 11 ICs, 6 connectors, 5 switches and 4 diodes.

From the project

- add connector for UART converter for debugging - add testpoint for ADC measurments - make oled from discrete parts, not module - change connector for programmmer, and move it out of the top layer - check if PCB can be smaller (especially batterry holder) - add more Rseries opti

- add connector for UART converter for debugging - add testpoint for ADC measurments - make oled from discrete parts, not module - change connector for programmmer, and move it out of the top layer - check if PCB can be smaller (especially batterry holder) - add more Rseries options - remove option without Rseries connected at all - it can fry PCB - remove connection to 2nd ADCs - Are there better opamps?? - remove option for 1.5 V ref

Main components on the LCRmeter

TPS2116DRLR74LVC1G66OLED74HC14MCP6001-OTSTM32G473C_B-C-E_TxLM1117MP-3.3

LCRmeter bill of materials (BOM)

68 components, 34 distinct parts.

QtyPartRefs
1
TPS2116DRLR
IC1
3
74LVC1G66
U1, U2, U7
1
OLED
U3
1
74HC14
U4
3
MCP6001-OT
U5, U8, U10
1
STM32G473C_B-C-E_Tx
U6
1
LM1117MP-3.3
U9
1
NX7002BKR
Q1
1
LCR_input
J1
1
LCR_input
J2
1
Prog_interface
J3
1
USB_B_Micro
J4
1
misc
J6
1
misc
J7
1
Batt
BT1
1
power
SW1
1
up
SW2
1
down
SW3
1
ok
SW4
1
back
SW5
Show 14 more
QtyPartRefs
3
BAT54S
D2, D3, D4
1
BAT54CW
D6
1
10u
L2
10
100n
C3, C4, C5, C7, C9, C10, C12, C13 +2
3
10u
C8, C18, C19
1
2u2
C11
1
100
R1
9
10k
R2, R4, R5, R6, R9, R10, R11, R12 +1
6
0
R3, R7, R8, R17, R20, R21
4
1k5
R14, R15, R16, R24
1
2k
R18
1
500
R19
2
10k
R22, R23
1
2k2
R25

LCRmeter design files

The KiCad project lives in the ironiron/LCRmeter repository on GitHub; these links point at the commit this page was built from.

LCRmeter: common questions

What microcontroller does the LCRmeter use?

The LCRmeter is built around the STM32G473C_B-C-E_Tx, from the STM32 family.

How big is the LCRmeter PCB?

The LCRmeter measures 64 × 55.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LCRmeter?

68 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the LCRmeter design files?

From the ironiron/LCRmeter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the LCRmeter design in my own project?

Yes, under the terms of its MIT license, which ironiron chose for the repository.

Can I test firmware for the LCRmeter without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

Similar boards