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2 layersLed clock prototype, the printed circuit board in 3D

Led clock prototype

richClubb/led-clock2

A desk or wall based LED clock

Copper layers
2
Thickness
1.6 mm
Parts
12
Nets
20
Pads
52
Tracks, vias
0, 0
Routed
Not yet
KiCad
KiCad 9.0 (file 20241229)
Created
11 Aug 2025
Updated
1 Sep 2025

Overview

Led clock prototype is an open-source printed circuit board by richClubb, from the richClubb/led-clock repository on GitHub. It is a 2-layer board with 12 parts on 20 nets.

Its parts include 5 resistors, 3 switches, 2 ICs and 2 connectors. It belongs with the lEDs and displays boards of this library.

README

README.md

LED Clock

A desk or wall LED clock based on the LED rings

Led Clock

Objectives

  • Easy for people to modify / use
  • Use an RTC to keep time even when it's off
  • Use NTP to update time
  • Single code to handle all 3 clock variants
  • Web page to set time
  • Using serial to set config
    • Change strip that each time unit is displayed on
    • Change colour of each unit
  • Self hosted network for setup
  • Timer functionality
    • start, pause, reset
    • programmable / controllable from buttons on device
    • config from serial, stored in EEPROM
    • Config for: Colour, number of flashes when completed, time increment for buttons(seconds, minutes, number of minutes per press)
  • Programmed in Rust
    • This is stage 2

The idea is that this is could be a product that I could sell, either as a finished clock or as a kit, but it's easy enough that it can be assembled by secondary school students.

Demos

Basic Functionality

Basic time movement

This video shows the movements of seconds, minutes and hours and how they blend together and move around the rings.

Time Unit Config

Time unit config

This video shows the colour change config of the seconds unit. It can also be re-assigned to either of the two rings

Timer functionality

Timer Functionality

This video shows the timer working. The timer is for 10s and then flashes to show completion.

Docs

  • Updates - Updates for the "12 Projects in 12 Months" Idea
  • Notes - General notes
  • Install - Installing and programming

Parts

12
QtyValueFootprintReferences
5R_SmallResistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolderR1, R2, R3, R4, R5
2Conn_01x03Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_VerticalJ1, J2
1SW_DOWNButton_Switch_THT:SW_PUSH_6mmSW3
1SW_MODEButton_Switch_THT:SW_PUSH_6mmSW1
1SW_UPButton_Switch_THT:SW_PUSH_6mmSW2
1~Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_VerticalU2
1~Waveshare:Waveshare_ESP32_C3_ZeroU1

Questions

What parts does the Led clock prototype use?

12 parts. 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 Led clock prototype KiCad files?

From the richClubb/led-clock repository on GitHub, at the commit this page was made from: the board is hardware/led-clock-prototype/led-clock-prototype.kicad_pcb and its schematic hardware/led-clock-prototype/led-clock-prototype.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Led clock prototype design in my own project?

Its repository states no licence, so its author keeps all rights: ask richClubb before reusing the design.

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