HardLabs

Hoppy clock

borkdlabs·hoppy_clock·hardware/hoppy_clock.kicad_pcb

Hoppy clock PCB layout, top view — open source STM32 board by borkdlabs

About the Hoppy clock PCB

Hoppy clock is an open source STM32 PCB design by borkdlabs, published on GitHub under the MIT license. It is a 4-layer board measuring 35 × 48 mm, with 50 components from 28 distinct parts.

Its main chip is the STM32L432KCU6, from the STM32 family. Other key parts include the TLV77333PDBVR, TPS2116DRL, USBLC6-2P6, W25Q128JVS and PAM8302AAS. By type, the board carries 20 capacitors, 15 resistors, 6 ICs, 5 connectors, 2 switches and 1 crystal.

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

From the project

STM32-based alarm clock and RGB lamp: custom alarms wake you with light and your own songs, configured over USB from the browser or a Python tool

STM32-based alarm clock and RGB lamp: custom alarms wake you with light and your own songs, configured over USB from the browser or a Python tool.

💚 Sponsored by PCBWay, who provided the bare PCBs and solder paste stencil for the v0.1.0-alpha boards - see Acknowledgements.

hoppyclock 1 Overview 1.1 Bill of Materials (BOM) 1.2 Block Diagram 1.3 Pin Configurations 1.4 Clock Configurations 2 Board Specifications 2.1 Connectors 2.2 Switches & Jumpers 2.3 LEDs 2.4 Test Pads 2.5 Power Supply 2.6 Speaker 3 Firmware 3.1 User Button Controls 3.2 USB Configuration 3.2.1 Web App 3.2.2 Python Tool 3.3…

Hoppy clock, from the project README
From the project README

Main components on the Hoppy clock

TLV77333PDBVRTPS2116DRLUSBLC6-2P6STM32L432KCU6W25Q128JVSPAM8302AAS

Hoppy clock bill of materials (BOM)

50 components, 28 distinct parts.

QtyPartRefs
1
TLV77333PDBVR
Texas Instruments
U1
1
TPS2116DRL
U2
1
USBLC6-2P6
U3
1
STM32L432KCU6
STM32L432KCU
STMicroelectronics
U4
1
W25Q128JVS
U5
1
PAM8302AAS
U6
1
ECS-.327-6-34R-C-TR
32k768
ECS Inc.
Y1
1
2171790001
Molex
J2
1
Battery Backup
J3
1
Qwiic
J4
1
WS2812B Breakout
J5
1
Speaker
J6
1
BOOT0
SW1
1
Button
SW2
1
WS2812B
D1
5
1u
C1, C2, C11, C19, C20
10
100n
C3, C4, C5, C6, C7, C8, C10, C12 +2
1
4u7
C9
2
6p8
C13, C14
1
10u
C17
Show 8 more
QtyPartRefs
1
4n7
C18
1
680k
R1
2
5k1
R2, R3
1
220k
R4
7
10k
R5, R6, R7, R8, R10, R14, R15
1
1k
R9
1
1k8
R11
2
100
R12, R13

Hoppy clock design files

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

Hoppy clock: common questions

What microcontroller does the Hoppy clock use?

The Hoppy clock is built around the STM32L432KCU6, from the STM32 family.

How big is the Hoppy clock PCB?

The Hoppy clock measures 35 × 48 mm, has 4 copper layers and is 1.561 mm thick.

How many components are on the Hoppy clock?

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

Where can I download the Hoppy clock design files?

From the borkdlabs/hoppy_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 Hoppy clock design in my own project?

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

Can I test firmware for the Hoppy 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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