Kitchen Timer with Clock

The request was a kitchen timer working the same way as the timer on a Whirlpool microwave oven.

User's manual

• The rotating knob is a push button too.

• In the clock mode pushing the knob or rotating it clockwise starts the timer's setting mode.

• Rotating the knob in timer setting mode sets the start time of the countdown.

• Pushing the knob with timer start time set, starts the timer countdown.

• Rotating the knob in countdown mode changes the running countdown time.

• When the timer countdown reaches zero the display starts to blink at full brightness and the bell rings tree times.

• Pushing the knob ends the alarm end returns the timer to the last set start time.

• In alarm mode the bell rings tree times every minute.

• Pushing the knob at 0:00 switches back to the clock view.

• Timer set mode returns to clock view after a minute of no activity.

• Long push in timer setting mode resets the timer start time to 0:00.

• Long push in clock mode starts the clock time setting mode.

• Long push time is 3 seconds.

• All possible actions are shown in the states diagram.