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LCD CLOCK

gratinDeTopinambour·LCD_CLOCK·Electronics/KICAD/LCD_CLOCK.kicad_pcb

LCD CLOCK PCB layout, top view — open source STM32 board by gratinDeTopinambour
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About the LCD CLOCK PCB

LCD CLOCK is an open source STM32 PCB design by gratinDeTopinambour, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 43 components from 28 distinct parts.

Its main chip is the STM32U073R8Tx, from the STM32 family. Other key parts include the TLV70233_SOT23-5 and TP4056. By type, the board carries 16 capacitors, 7 switches, 7 resistors, 3 ICs, 2 transistors and 2 connectors.

It belongs with the displays & leds and power & battery designs in this gallery.

From the project

low power LCD clock with stm32 on lithium batterie

A complete open-source low-power LCD clock project based on the STM32U083RCT6 microcontroller.

This repository contains all the resources required to build the project:

- 📐 3D Design: Enclosure and mechanical parts for 3D printing. - 🔌 Electronics: Schematics, PCB layout, BOM, Gerbers, and PDF documentation. - 💻 Firmware: Embedded C software developed using STM32CubeIDE / STM32CubeMX. - 🖥️ LCD Display: Direct driving of a 4-digit LCD display by the STM32. - ⏰ Timekeeping: Utilizes the internal RTC and low-frequency LSE oscillator. - 🔋 Power Management: Leverages low-power peripherals and…

LCD CLOCK, from the project README
From the project README

Main components on the LCD CLOCK

STM32U073R8TxTLV70233_SOT23-5TP4056

LCD CLOCK bill of materials (BOM)

43 components, 28 distinct parts.

QtyPartRefs
1
STM32U073R8Tx
U1
1
TLV70233_SOT23-5
U2
1
TP4056
U3
1
AO3401A
Q1
1
AO3400A
Q2
1
ABS07-32.768KHZ-1-T
Y2
1
Conn_01x02_Pin
J1
1
ST-link
J3
1
BHC-18650-1P
B1
1
DE 158-RS-20/6,35
DE_158-RS-20_6,35
DS1
1
H1
SW1
1
H2
SW2
1
M1
SW3
1
M2
SW4
1
RST
SW5
2
Light
SW6, SW7
1
TT7-10KC8-3
TH1
2
LED
D1, D2
5
100nF
C1, C2, C3, C4, C5
4
1uF
C6, C7, C9, C10
Show 8 more
QtyPartRefs
3
100nF
C8, C11, C12
2
100nF
C13, C14
2
12pF
C15, C16
1
10k
R1
2
270
R2, R3
2
22k
R4, R5
1
100K
R6
1
22K
R7

LCD CLOCK design files

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

LCD CLOCK: common questions

What microcontroller does the LCD CLOCK use?

The LCD CLOCK is built around the STM32U073R8Tx, from the STM32 family.

How big is the LCD CLOCK PCB?

The LCD CLOCK measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LCD CLOCK?

43 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the LCD CLOCK design files?

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

Can I use the LCD CLOCK design in my own project?

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

Can I test firmware for the LCD CLOCK 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.

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