Tea timer with LED & Buzzer
Designed to let you know when a perfect pot of tea is brewed by sounding a buzzer and flashing an LED after 4 minutes. Connections: LED anode (long leg) to leg 1. Buzzer anode (long leg) to leg 3. Short legs to GND. Display: Left hand column of pixels indicates the number of minutes elapsed. First run is a fast demo. After that press button A for the 4 minute timer. Press button B for the fast demo. If you add any code you may need to adjust the time_normal constant to a lower value to ensure that the timer counts the minutes accurately. .Works great with the CR2032 battery. I wonder whether it will slow down as the battery runs down and how long the battery will last? Press button A every time you want to time your tea.