This circuit for conventional lines was obtained in a 1996 documentation. The circuit uses common components except the buzzer that is of the 24 V type oscillator. The bridge is 4 x 1N4004 diodes.
This circuit for conventional lines was obtained in a 1996 documentation. The circuit uses common components except the buzzer that is of the 24 V type oscillator. The bridge is 4 x 1N4004 diodes.