---
title: "Timeotron 3000: a speed-climbing timer"
description: "A start/stop timer for speed climbing with a large LED matrix display."
date: 2019-02-24T16:06:34+01:00
lastmod: 2026-10-16T18:58:52+02:00
url: https://klimek.link/projects/timeotron3000/
author: "Marcin Klimek"
source: https://klimek.link/projects/timeotron3000/
---

# Timeotron 3000: a speed-climbing timer

Speed climbing is about tenths of a second, so a speed wall needs a proper clock to go with it. **Timeotron 3000** is a small microcontroller board with two buttons, start and stop, and a large display built from eight 8×8 LED matrix modules (MAX7219, 4×2) driven through the MD_MAXPanel library.

At power-up it runs a quick display test (00.0, 11.1 … 99.9). Pressing start begins counting, with the elapsed time shown to a tenth of a second, and stop freezes the result on the display until the next start, while the EasyButton library takes care of debouncing both buttons.

*Diagram: Timeotron 3000: two buttons, a microcontroller and eight LED matrix modules*

This was the first of my timing devices for climbing gyms, the ones that later became part of [Backdoor](/projects/backdoor/).

[Source on GitHub](https://github.com/marcinklimek/timeotron3000).

Source: https://klimek.link/projects/timeotron3000/