Hello, I need some help with my school project. I found a schematic here LCD Digital Alarm Clock Arduino – Microcontroller Based Projects . I did everything fine but when alarm is supposed to turn on piezo buzzer doesn't do anything. Is problem in code or did I use wrong buzzer which works on 5V.

Digital alarm clock

Hrvoje007 May 5, 2018, 4:13pm 9

Serial.print test didn't work,LCD just displayed letters and numbers normal and buzzer did nothing. If I buy piezoelectric speak 3V would it work or do I need 5V one.

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Digital alarm clock

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