Month: March 2013


Formally announcing the success of my latest project ‘A DIGITAL THERMOMETER using the famous temperature sensor from National Semiconductor LM35. This is actually a small circuit in which the temperature sensor senses the temperature and the circuit converts the temperature into an equivalent voltage which can be read by connecting the circuit to a Digital Multimeter [DMM].This can sense the room temperature and can be connected to a DMM for the output. This circuit converts temperature into a corresponding voltage i.e., for every degree of the temperature increase the output increases by 1 mV VDC. It uses a 3 lead LM 35 Temperature Sensor. Continue reading

Working of MAGLEV Trains

Working of MAGLEV Trains

From the time i had heard of Magnetic Levitation i was very much fascinated by them and wanted to learn more about the working of these trains. This fascination towards something so awesome in technology using just the concept of magnets has led to one of the most revolutionary mode of transport changing the way we commute, hats of to the person who conceived this idea.

We have always thought of aeroplanes as the fastest mode of transportation. As it travels thousands of miles in an hour we do not mind Continue reading



One common and interesting application of LDR will be discussed in my next post.

Light dependent resistors or LDRs are often used in circuits where it is necessary to detect the presence or the level of light. They can be described by a variety of names from light dependent resistor, LDR, photoresistor, or even photo cell (photocell) or photoconductor.

A photoresistor or light dependent resistor (LDR) is a resistor whose resistance decreases with Continue reading


LEDs are being Incorporated in vast magnitudes today for everything that may involve lights and illuminations. White LEDs have especially become very popular due to their mini size, dramatic illuminating capabilities and high efficiency with power consumptions. Here we are discussing the making of a simple LED bulb CIRCUIT DIAGRAM, Which i have built and tested.


The circuit of a LED bulb explained here is very easy to build and the circuit is very reliable and long lasting. The exclusive surge protection feature included in the circuit ensures an ideal shielding of the unit from all electrical power ON surges. Looking at the figure we see that basically LEDs have been used which are connected in series. The diagram shows a single long series of LEDs connected one behind the other to form a long LED chain. The power supply circuit used for powering these arrays is derived from a high voltage capacitor, whose low reactance is exploited for stepping down the high voltage input to a lower voltage suitable for the circuit. The two resistors and a capacitor at the positive supply are positioned for suppressing the initial power ON surge and surges during voltage fluctuations. In fact the real surge correction is done by C1 introduced after the bridge (in between R1 and R2), this modification has been incorporated in this circuit after a long research process by me to protect the circuit from voltage surges. Continue reading

320-Gigapixel Photo Shatters Record

320-Gigapixel Photo Shatters Record

Click the photo to view the actual photograph

In the last Post, I showed you an interactive, high-res image taken from the top of the world’s tallest building, the Burj Khalifa in Dubai. That image was huge — 2.5 gigapixels. Now there’s an even bigger gigapixel image, a 360-degree panoramic photo of London that comes in at a record 320-gigapixel resolution.

The panorama was created by installing four cameras around the outside platform of the 29th floor of the British Telecommunications tower. The cameras were then attached to robotic mounts timed to take four frames a second. It took three days to snap the images and three months for a computer program to stitch together all 48,640 individual shots.

Interact with Panoramic Pic from Tallest Building

Interact with Panoramic Pic from Tallest Building

Click the Image to view the actual photograph.

You may never get to Dubai and stand atop of the world’s tallest building, the 2,717-foot-tall Burj Khalifa. But this interactive photograph may be the next best thing. It was created to celebrate the annual Hamdan Bin Mohammed Bin Rashid Al Maktoum Photography Award (HIPA), which awards prizes totaling $389,000. The grand prize awarded is $120,000.

The interactive image was taken by Dubai-based photographer Gerald Donovan, who not only went to the top floor, Continue reading


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