This circuit provides an uninterrupted power supply (UPS) to operate 12V, 9V and 5V DC-powered instruments at up to 1A current. The backup battery takes up the load without spikes or delay when the mains power gets interrupted. It can also be used as a work bench power supply that provides 12V, 9V and 5V operating voltages. The circuit immediately disconnects the load when the battery voltage reduces to 10.5V to prevent deep discharge of the battery. LED1 indication is provided to show the full charge voltage level of the battery. Miniature white LEDs (LED2 and LED3) are used as emergency lamps during power failure at night.

Welcome to Unitronics which brings simple circuit diagram of UPS power supply. Making the circuit for UPS (uninterrupted power supply) is really not a difficult task. We brings simple form of commercial UPS which can easily provide electric power of 12V. You will be amazed to know that this circuit can be adapted for other regulated and unregulated voltages by using different regulators and batteries

Making buildings Green