Simple UPS

Posted on Feb 5, 2014

This is the circuit diagram of a simple UPS that can deliver 12V unregulated and 5V regulated DC. The transformer T1 steps down the mains voltage to 12V AC and then the bridge B1 rectifies it. The rectified signal is smoothed by the capacitor C1. When the mains supply is available the battery will be charged via diode D3 and the regulator IC gets s

Simple UPS
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upply via diode D5. 12V and 5V DC will be available at the output terminals. When mains supply is not available the battery supplies current to the regulator IC and to the 12V DC terminal through diode D4. Also, the diode D3 blocks reverse flow of current during battery mode. Capacitors C2 and C3 acts as filters. i want to know how the inverter change the 12v to the 220v cos i can not see the step up transformer in the circuit and more so the inverter circuit is not clear to me. sir i want to see the battery bank circuitry inside the ups and how we can estimate the ups health and this is possible to estimate batteries health individually or we can estimate the health of the banks as a whole. thanks for quick reply. I need a circuit of 16v unregulated and 12v regulated with atleast 1. 2A as output. I`m planning to use 16-0 3A step down transformer. So i`m planning to use 7812 IC instead of 7805 ic inside the circuit to get 12v 1. 2A as the output. My questions are 4)Also i want to add a battery over charging protector circuit as in. its for 6v battery. i want to use it for my 12v battery with 16v transformer o/p. just tell me what all to be changed. Plz kindly answer all the 4 questions. Plz sir, i`m in very confused situation. I know i`m torturing you, even though i`m thanking you for your valuable support. Thanks will u plz reply via email ganeshrnet{@}live{. }com thanks for quick reply. I need a circuit of 16v unregulated...

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