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The indicated 200 turns is tentatively figured out and might need much tweaking for achieving the intended 220V from the input 6V battery source. L1 must be appropriately calculated such that it generates the required magnitude of voltage across the shown terminals. T1 induces the entire battery current across L1, causing a proportionately boosted voltage to appear across it during the OFF periods of the T1 (induced back EMF from L1). IC1 is configured as an astable oscillator, which drives T1 and consequently L1 at the same frequency. The idea is pretty simple and does not require much of an elaboration. The extreme left side battery section ensures an changeover from mains to battery back up every time a power failure is sensed by the circuit. Referring to the diagram above, a couple of sections can be seen, the IC1 configuration enables a 6V DC to be boosted to a much higher 220V pulsed DC through a boost converter topology using the IC 555 in its astable form. Since today all electronic systems employ an SMPS power supply, the input does not necessarily need to be an AC for powering these equipment, rather an equivalent DC or pulsed DC also become useful and works as good. I know you have lot of work, but if you could spare some time and help me with this it would be of great help. The output wattage requirement is less than 20 watts, the To be precise 220 volts from 6 volt battery, as I have purchased a 6 volt 5 ah battery recently. Why I am looking for AC supply instead of DC?I do not want to tamper with their system and get penalized for whatsoever failures which may come to it due to natural course of operation.Ĭould you please help me with a very simple cost effective circuit that will give me 220 volt 20 watts power from 6 volt 5ah battery. I had thought of a small back up system,I had purchased a small 6 volt 11 watt CFL Ballast circuit thinking as cheap alternate solution, but the same failed to work. Issue: My apartment maintenance people do not run backup (generator) during day time, I have a Tata sky DVR which fails to record since there is signal loss due to power failure. Though I know only the basics, I am sure you must be getting 100's of emails daily and I am completely betting on my luck if this one gets to your "eyes"ġ6 volt 1 amp DC backup for my apartment Tata sky centralized distribution panel. I am an enthusiast electronic hobbyist person.
Power booster for router Offline#
The second circuit explains a simple boost converter UPS circuit for supplying an uninterruptible power to satellite TV set top boxes so that the offline recording is never allowed to fail during power outages.
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R1 must be selected depending upon the charging current rate of the attached battery.Ī much better and improved version of the above is shown in the following diagram: 2) 6V to 220V Boost UPS Circuit In an event AC mains fails, D1 gets switched OFF, and therefore allows D2 to conduct, enabling the battery voltage to instantly reach the modem without causing any interruptions to the network. This allows only D1 to conduct, supplying the voltage from the adapter to the modem.ĭ2 being switched OFF, the connected battery starts receiving the required charging voltage via R1 and begins getting charged in the process. When mains is present, the voltage at D1 cathode is more positive than D2, which keeps D2 reverse biassed. This is easily done using a transistor zener stage. Normally a laptop charger is specified with 18V, so for charging a 12V battery this needs to be lowered to 14V. Looking at the given DC modem UPS circuit diagram we can see a simple yet interesting configuration involving a couple of diodes D1, D2, and resistor R1. A single adapter, probably the one which is being used for charging the laptop battery may be used for charging the external battery also. Two adapters actually are not required for the proposed application. That is why i want to use two 12v dc adapter. When the AC mains fails the battery will backup my wifi router without interruption.like UPS. When input Mains is present, with the 600ma adapter i want to charge the battery(7.5AH) and with the 2A adapter i want to use my wifi router. The first idea below presents a DC UPS circuit can be used for providing back up power to modems or routers during mains failures, so that the broadband/WiFi connection never gets interrupted.