ATtiny402 Timer with low power sleep mode

ATtiny402 Timer with low power sleep mode

David Johnson-Davies published another great mini project. It’s a Timer based on ATtiny402 and was build to demonstrate the low power sleep mode of the microcontroller.

This article describes how to use the new 0-series and 1-series ATtiny microcontrollers in low-power projects, taking advantage of sleep mode to maximise the battery life and avoid the need for an on/off switch. The project is a simple 15-minute timer that flashes an LED once every 2 seconds while it is counting down, and then beeps a piezo buzzer when the time has expired. You could use it as the basis for an egg timer, a bath-overflow alarm, or any other fixed timer application.

ATtiny402 Timer with low power sleep mode – [Link]

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Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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