Electronic Design: Power Supply Resumption Alarm using 555 IC

Power Supply Circuit. - This is one of implementation of 555 IC to build power supply resumption alarm that very useful when power is fail in some place like factories, industries, auditoriums, and theatres etc. It is only need small component to build this electronic circuit that basically using 555 IC and other component.

The electronic design circuit of power supply resumption alarm using 555 IC is look like in Figure 1 below. Other component used like resistors, capacitors, transformer, relay, diodes, transistor and also buzzer to sound this alarm.

Beside we will show you electronic design circuit and component parts need, we also will give you global description about this circuit. So, please enjoy to continue reading this article until finish and get more useful.

Electronic Circuit Design

Figure 1. Electronic Design: Power Supply Resumption Alarm using 555 IC (source: Electronicsproject.org)

Component Parts

• R1, R2 = 10 KΩ
• R3 = 470 Ω
• VR1 = 1 MΩ (DELAY ADJ.)
• C1 = 1000 µF/25V
• C2 = 100 µF/25V
• C3 = 1 µF/25V
• C4 = 0.01 µF
• IC1 = NE555
• T1 = SL100
• D1 – D3 = 1N4001
• X1 = 12V – 0 – 12V 500 mA secondary
• F1 = Fuse
• RL1 = 12V, 400Ω relay
• 230V buzzer

Description

The electronic circuit design like in Figure 1 above show you power supply resumption alarm circuit using 555 IC. Other component need also that can supply with low voltage DC 12V source to charge this transistor and all system component from power supply built. With this electronic design circuit you can produce power supply resumption alarm that useful now.

According ElectronicsProject blog mentioned that the circuit is built around IC555 wired in monistable mode. The surge when power resumes triggers the monostable which switches transistor SL100 on. The relay energized and the bell or buzzer connected to N/O contacts of the relay operates. The preset time depends upon VR1 and C2. The Capacitor C3 connected to pin 2 of 555 should have low leakage.