Next to be updated

The next update would be of light sensor for most home applications.
The detector would be placed at the a proper place where the sun would be in the line of sight to detect sunlight. When in short of the sunlight , it would switch on a tubelight or else a bulb to which it is connected.

TO be UpDated in this week.

Emergency Light

The first post that I wanted to make was the Emergency light, it is an important creation for me cause this was my first ever board that I designed completely by myself.This might be of use to everyone due to the frequent power cuts these days.

The list of Components and their ratings:

1. Diodes : 1N4007 -  6 nos
2. Capacitors : 470uF, 16V -1 nos
3. Regulator : MC7805- 1nos
4. Battery : 4V, 4.5Ah - 1nos
5. Relay : 5V DC, single pole, I used Hongfa relay  1nos
6. Resistors: 1kohm,1/2W  2nos
7. LED's: Green , Red - 5mm
8. Transformer: 0-6V, 500mA secondary
9. 2 Pin male and female connectors: 4nos
10. White LED: half cut , 5V  - Quantity can be as per required..I used about 40 of them in mine.
11. Mechanical casing to fit in all the components firmly.

I have used acrylic box to fit the PCB, the red light when the power is not there can be seen in the above image.

The operation of the circuit is very simple. The diodes convert the input AC voltages to DC , the capacitors remove and regulate the ripple, the regulator takes care of the voltage step down in case of surges.The regulator is connected to the battery such that it only gives power to the battery.The relay inputs the ac power and keeps itself on whenever there is power.In case of power loss, the relay deactivates itself letting the battery power the led's. 

The PCB layout for my design has been attached to this post.

Emergency light by Dheeraj Sonnenahalli

Upgrades :

Changes in battery can be made , if in case higher voltage battery is used then connection of led's in series would help.Also dont forget to replace the voltage regulator [7805] with the battery rated one (remember to use the regulator about 2V higher voltage rated than in battery) and also the transformer with rated voltage and current.

The begin

I found some really interested people in electronics and embedded systems recently at my college, watching them I thought how many more would be there without proper availability of resources. I was such a couple of years back and still beginning to learn. This blog was inspired by many of my friends who continuously fussed me upon putting up a blog for myself and even are doing it now, I thank you all for the inspiration.

To describe the blog, it will be posted with some useful tips and tricks on designing , printing and fabrication of PCB's towards conventional electronics and also digital electronics.My contact details have been provided on my profile. I would love to help people out on their projects, hobbies and other stuff so feel free to contact me.

Thanking you all,
Dheeraj