The function of the 555 timer is mainly determined by two comparators. The output voltage of the them controls the state of the RS flip-flop and the discharge tube. It also contains 3 working states.
Pomodoro: 25-minute work blocks with 5-minute breaks to boost focus and avoid burnout. ESP32-powered, 3D-printable Pomodoro timer with pause and reset; wiring, code, and files on GitHub. Fun DIY ...
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