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DTL Software — July 2026

DTLclock

A realistic French grandfather clock for Windows with an animated pendulum, tick-tock, and configurable chimes.

v1.6-3English / FrançaisWindowsPython / PyInstaller

DTLclock recreates the movement and sound of a French grandfather clock in a responsive Windows interface.

The pendulum drives the visual mechanism. The second hand advances at every mechanical beat, even when the tick-tock is stopped, muted, or unavailable.

Main features

  • animated pendulum and synchronized mechanical second hand;
  • tick-tock with independent start, stop, and volume controls;
  • two chimes: 18th-century metallic and 19th-century deep tone;
  • automatic hourly and half-hour chimes;
  • chime test button;
  • silent hours configured through a hidden compartment;
  • responsive interface and stand-alone Windows executable.

Mechanism and chimes

At every full hour, the selected chime strikes the time on a twelve-hour cycle. At every half-hour, one fixed 18th-century chime strike is played. Automatic chimes can be disabled globally.

The central rose hides the silent-hours panel. Selecting an hour silences both its full-hour and half-hour strikes.

Configuration

DTLclock.ini contains the visual and mechanical settings and the initial tick-tock volume. If the file is missing or a value is invalid, the application uses its built-in defaults.

Quick start

.\dist\DTLclock.exe

python .\DTLclock.py

Running from source requires Python 3.10 or later. The stand-alone executable is built with PyInstaller.