ne555

Wailing Alarm Siren

Here is the wailing alarm siren circuit diagram: Components List: R1,R5___________ 4.7K R2______________ 47K R3______________ 10K R4______________ 100K Rx______________ *see…

55 years ago

Electronic Buzzer with IC timer NE555

This easy electronic buzzer circuit built based on timer works for gaining the frequency. The IC timer NE 555 used…

55 years ago