DIY – Backup light using UPS

Electricity, Who can live with out it? During day time it would be possible by going out, reading a book or cleaning the room etc. But at night time it is extremely boring since none of the above can be done.

A couple of months back I hit upon a idea of pulling a wire from the APC UPS used for my desktop computer and using it to light a bulb. After thinking over hard I felt now is the right time to do this and do it by myself as a Do It Yourself (DIY) task.

The timing was essential as elections have just got over. Wondering what has elections got to do with power supply? You are probably not from India then, the politicians try every trick in the book to keep the the voters happy and ensuring uninterrupted power supply during election time is one of them. Once the elections are over then the situation returns to normal, ok…ok…now back to the main topic :-)

Items required:
1. UPS
2. Wire
3. Bulb holder
4. Bed lamp switch
5. Computer AC socket adaptor
6. Two pin plug
7. Bulb

1. Take one end of the wire and attach the two pin plug to it.
2. Take the other end and attach the bulb holder to it.
3. Starting from two pin plug point end measure and cut the wire around the four/five feet height and attach the bed lamp switch.
4. Attach the computer AC socket adaptor to the UPS.
5. Now attach the two pin point to the computer AC socket adaptor.
6. Attach a bulb to the bulb holder.
7. Turn the bed lamp switch to ON state.
6. Enjoy :-)

Points to note:
1. The length of the wire would depend on your requirement, I bought around 7 meters at the rate of Rs.4/meter.
2. The bulb holder, bed lamp switch and the two pin plug are all available cheaply, I paid Rs.10, Rs.10 and Rs.6 respectively.
3. The computer AC socket adaptor was the most difficult item to get, I had to search a lot of shops to find this, in the end I had to pay for it at MRP without bargaining. If the shopkeeper where you are trying to buy this is ignorant of the adaptor let him know ofthe use then he may be able to help you out. It cost me Rs.80/-
4. Instead of the incadesant bulb it is better to use a CFL unit, though the initial investment is on the higher side, the advantages it provides is huge. The power consumption is low, the light is good enough to read a book.
5. Always be careful when doing any activity which involves electricity be very careful.

For an investment of just around Rs.200 I was able to complete the setup. Though I was unable to do a complete run till the UPS ran dry, I was still able to test it for one continuous hour thanks to the electricity board which turned off the power the moment I completed my set-up. So I was able to get good light using the 18W CFL and it ran for one hour and the UPS still had some juice left. So not sure how long it could run, will do a benchmark run some other day. Overall 100% worth for the amount spent and I am happy with the set-up.

Ps. I was complaining to my friend today when I bought the adapter that as usual now that I have bought this the power would not go similar to the day when you take the umbrella it doesn’t rain. But the power board proved me wrong and cut power for full one hour!! Look who is listening to the consumers and taking consumer satisfaction to a whole new level ;-)


DIY in Action
DIY in Action

DIY in Action
DIY in Action

Messy set-up at the moment ;-)

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