This is simple phone ringer circuit using IC 4060.
Can run it by 5 to 12v and its power consumption is very low, lower than 10mA.
You can use any other PNP transistor rather than S9012.
Parts list:
IC 4060
Transistor S9012(3pcs)
Capacitor 3.3nF
Resistor 13k (3pcs)
Resistor 100k
Potentiometer 100k
Buzzer
Can run it by 5 to 12v and its power consumption is very low, lower than 10mA.
You can use any other PNP transistor rather than S9012.
Parts list:
IC 4060
Transistor S9012(3pcs)
Capacitor 3.3nF
Resistor 13k (3pcs)
Resistor 100k
Potentiometer 100k
Buzzer
