Circuit Diagram of UPS or Uninterruptible Power Supply


Uninterruptible Power Supply(UPS) Circuit Diagram



Here a Circuit Diagram of UPS is given. You can easily make a UPS(Uninterruptible Power Supply) at your Home. It is a very simple UPS circuit diagram. From this UPS you can get two power supply of different voltage one is 12V unregulated DC Power supply and another is 5V regulated DC Power Supply. The UPS can deliver up to 2A current.


Component List:



Components
Rating
Quantity
Indicated
In the Circuit diagram
PN Junction Diode
1N4007
7
D1, D2, D3, and in B1
Transformer
230V/12V, 3A
1
T1
Resistors
220 ohm
1
R1
Capacitor
2200 microfarad, 25V
1
C1
Capacitor
100 nano-farad
2
C2, C3
Fuse
2A
2
F1, F2
Resistor
1K
1
R2
Battery
12V
1
Battery
IC7805
IC7805
1
IC1
LED
3V
1
LED1





UPS Circuit Diagram with component rating:




Circuit Diagram of UPS, UPS circuit diagram for home made






Brief working Principle of UPS:


As you see in the above Diagram a 230V/12V step-down transformer is used. So first 230V AC supply steps down to 12V AC. Then a bridge rectifier using PN Junction diodes is used to convert 12V AC to 12V DC. After the bridge rectifier, a Fuse of 2A is used for protection purpose.


                  Then a Capacitor is connected in parallel for filtering the impure DC into pure DC. An LED is connected through the resistor for indicating purpose. Diode D1, D2, and D3 are connected in such a manner, that when the main supply is available the battery will be charged through diode D2. At the same time, the output supply will be available through the diode D1.


               When the main supply is not available then the battery will provide power to the load through the Diode D3. The Diode D2 will block the reverse power supply from the battery to the transformer. IC7805 is used to provide 5V DC regulated power supply at the output. You can use IC7809 to get 9V DC regulated power supply. Capacitors C2 and C3 are also used for filtering purpose.


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Circuit Diagram of UPS or Uninterruptible Power Supply Circuit Diagram of UPS or Uninterruptible Power Supply Reviewed by ETechnoG on 09:16 Rating: 5
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