CINDERCLOCK

Name: CinderClock
Brand: Endothermal Systems

programmable desk alarm clock

CinderClock on a desk: a white cube with a large red illuminated dome button on top, a wide monochrome display reading 23:25, and a joystick with four round buttons on the raked front face

Tired of using your phone for everything? Especially for alarms?
CinderClock is a multi-purpose desktop clock, a dedicated device for your time related needs.
Alarms. Timers. Stopwatch. Calendar. Games.
Take control and focus back from your phone.
No app. No account. No subscriptions.

Featured on Gadget Flow, the original product discovery platform

Adapts to any schedule

A phone alarm gives you one time and a weekday switch. CinderClock stores the whole pattern.

07:00, weekdays.
08:00, every third day.
06:30, Monday, Tuesday and Friday only.
07:00, three days on and two days off, repeating indefinitely.
08:00, weekdays, two weeks on and one week off.

Set a rotation once and it holds for as long as you leave it there. Each alarm carries its own sound and its own volume. Pre-alarm can play something quiet ahead of the main alarm to get you going.

The CinderClock repeat pattern editor, showing a duty cycle of days on and days off — **Repeat pattern.** Days on, days off, and the date the cycle counts from.

The CinderClock pre-alarm settings screen, showing lead time and sound selection — **Pre-alarm.** A quieter sound, some minutes ahead of the main one.

Sunrise and Shine

Enter your coordinates once, or eyeball on the world map.
CinderClock works out local sunrise and sunset for every day of the year and carries the alarm with them through the seasons.

Both take an offset in either direction, so the alarm can land thirty minutes before the first rays, or ninety minutes after sunset to remind you of bedtime.

The CinderClock world map screen, used to set location coordinates for sunrise and sunset calculation — **Location.** Coordinates on the world map.

Hard to miss THIS button

Left, a palm coming down flat on the red dome button while the display reads 14:44. Right, CinderClock standing on a desk showing 14:42 — Palm hitting the dismiss button.

The dismiss button is a 100 mm arcade dome on the top face. Smash it like it's hot.

An alarm can ask for more than that.
Set it to require a game, if you lose - you snooze. Try again in five minutes!

A CinderClock arcade game running as an alarm dismissal challenge, with the alarm still sounding behind it — **Dismissal by game.** The alarm rings again until the game is won.

The rest of the cast

Timer, with saved presets and Pomodoro.
Stopwatch with laps, down to the centiseconds.
A full month calendar that marks the ringing days.
Ambient sound with animations to match, like fireplace or rain.
Nine arcade games, and room for more.

Audio files are stored on the SD card, choose from the presets or upload your own.

The CinderClock Pomodoro timer screen, showing a work interval counting down — **Pomodoro.** Work and rest intervals, saved as presets.

The CinderClock stopwatch screen, showing elapsed time to the centisecond with recorded laps — **Stopwatch.** Centiseconds, and up to four laps held.

The CinderClock calendar screen, showing a full month with markers on the days that have alarms set — **Calendar.** A full month, with the ringing days shown.

The CinderClock fireplace ambient screen, with an animated fire drawn on the monochrome display — **Ambiance.** Sound and animation, from the card or the presets.

No app. No account. No subscription.

CinderClock photographed straight on in low light, the display reading 23:23, the red dome lit above it

Every feature runs on the device. The WiFi is off when it boots, requires you to start it manually, to open a file transfer portal or to install new firmware.

The firmware and the documentation are open source under Apache 2.0, on GitHub. Every active component is a breakout module on pin headers, so the parts can be replaced or modified easily.

What it will not do

It does not light your room. If a sunrise lamp is what you are after, the Philips SmartSleep and the Hatch do that.

Battery runtime is not measured yet. The design target is two weeks, optimizations and testing are underway.

Sunrise and sunset accuracy falls off above roughly 65 degrees of latitude, where the sun may not rise or set on a given day.

It plays only WAV files. Convert your MP3s here.

No claim is made about sleep quality.

Every decision behind this device, and every one the build corrected, is written up in the CinderClock design study.