4 hours AC power timer circuit 555 BH4024

The circuit illustrated in Figure 4 is an AC timing circuit designed to operate for 4 hours. It utilizes the BH4024, a 7-stage serial binary counter/divider, in conjunction with a 555 timer circuit. The circuit is activated by a timed touch of a button, referred to as AN. Each press of the button outputs a 220V AC power supply for a duration of 4 hours, after which the power is de-energized. This circuit can be employed to control the operation of a power supply unit for a duration of four hours.

The AC timing circuit operates effectively by leveraging the capabilities of the BH4024 integrated circuit, which functions as a binary counter. The BH4024 is designed to count pulses and can be configured to divide the input frequency, making it suitable for timing applications. In this circuit, the 555 timer generates a precise timing pulse that is fed into the BH4024.

When the button AN is pressed, it triggers the circuit to start counting. The 555 timer is configured in monostable mode, producing a single output pulse that activates the BH4024. The output from the BH4024 can be set to toggle at specific intervals, allowing it to maintain the output for the required 4 hours.

The output stage of the circuit is designed to handle a 220V AC load. This can be achieved through the use of a relay or a solid-state switch that is activated by the output of the BH4024. The relay acts as a switch that connects the AC power supply to the load while the timer is active. After the designated time period of 4 hours, the BH4024 deactivates the relay, cutting off power to the load.

This timing circuit is particularly useful in applications where controlled power supply is necessary, such as in lighting systems, industrial equipment, or automated processes requiring a timed operation. The design is efficient, reliable, and can be easily modified for different time durations by adjusting the components in the 555 timer circuit or the configuration of the BH4024. As shown in Figure 4 hours AC timing circuit. In this circuit, BH4024 is 7 serial binary counter/divider 555 time base circuit. AN is timed touch of a button. Each press AN tim e, output AC 220V power supply for 4 hours and that is de-energized. The circuit can be used on the afternoon of the power supply unit of work time by four hours manner.