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
Click here to download the full size of the above Circuit.
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...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: