Circuit Schematic 5 Volt / 1.5 Ampere Uninterruptible Power Supply (UPS)

UPSToday. - This is one circuit schematic Uninterruptible Power Supply (UPS) that can produce output 5 Volt / 1.5 Ampere DC that can automatically produce from re-charger battery that used in this circuit. When the electric source normal the output come from electric source that give output 5 Volt / 1.5 Ampere, and the electric source fault or dropped, it make this UPS source from battery.

In this article beside we will show you electronic circuit schematic, component list, in here we also will give you global description of this Circuit Schematic 5 Volt / 1.5 Ampere Uninterruptible Power Supply (UPS) like in Figure 1. below.

Circuit Schematic

Figure 1. Circuit Schematic 5 Volt / 1.5 Ampere Uninterruptible Power Supply (UPS) (Source: Eeweb screenshot)

Component List

1. Transformer step-down with output 12 VAC using center tap (CT)
2. Bridge diodes IN4001
3. Fuse 1 = 2A
4. C1 = 2200 uF/25V
5. R1 = 220
6. R2 = 1K5
7. LED
8. D1 - D3 = IN4001
9. Lead Acid Battery 12 Volt
10. C2 = 100 uF/12V
11. U1 = LM7805
12. C3 = 1 uF/16V
13. Fuse 2 = 2A

Description

Circuit schematic like in Figure 1 above is Circuit Schematic 5 Volt / 1.5 Ampere Uninterruptible Power Supply (UPS). The semiconductor component as the main component in this circuit is LM7805. This IC is voltage regulator that can produce stabilize voltage 5 volt with current 1.5 ampere output. 

According Eeweb site that publish this circuit describe that the circuit drawn pertains to a regular industrial UPS (Uninterruptible Power Supply), which shows how the batteries take control during an outage in electrical supply or variation beyond the normal limits of the voltage line, without disruption on the operation providing a steady regulated output (5 Volts by LM7805) and an unregulated supply (12 Volts).

Figure 2. LM7805 Pinout Diagram

The input to the primary winding of the transformer (TR1) is 240V. The secondary winding can be raised up to 15 Volts if the value is at least 12 Volts running 2 amp. The fuse (FS1) acts as a mini circuit breaker for protection against short circuits, or a defective battery cell in fact. The presence of electricity will cause the LED 1 to light. The light of LED will set off upon power outage and the UPS battery will take over

The circuit was designed to offer more flexible pattern wherein it can be customized by using different regulators and batteries to produce regulated and unregulated voltages. Utilizing two 12 Volt batteries in series and a positive input 7815 regulator, can control a 15V supply. 

This Circuit Schematic 5 Volt / 1.5 Ampere Uninterruptible Power Supply (UPS) very suitable for electronic device with supplying low power with voltage 5 volt like microcontroller circuit and others.

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