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Infrared light has a difference with ordinary light in general. We can see clearly when a light or light on an object. As with the infrared light we can not see the manifestation of these rays. Frankly I can not answer when asked why the infrared rays are not visible in the eyes of us. So at night do not hope you can make light by using infrared light. One thing that is often heard from many people that infrared light can utilized for the functions of a camera that can see in dark conditions is often called an infrared camera. Actually I have explained the working principles of electronic circuit section in this blog is about the basic working principle of a series of infrared sensors are simple. To design this sensor circuit you should not find trouble if you ever make another series of sensors. It's just that the sensor circuit consists of the transmitter and receiver, to learn the basic principles of this series of infrared you can see in the Basic Principles Series Infrared Tra...

  Seven Segment display is the most common and fundamental display device which is used in many Electronic Gadgets and Appliances like Electric stove,Microwave Owen,Digital Clocks and also in many Digital Meters like Multimeter. The seven segment display is called so since it contains 7 segments of LED which is assembled in a structure resembling like numeral ‘8’.This is because you can form all 10 digits (0-9) from the pattern ‘8’. Actually 7 segment display consists on 8 segments,In which apart from seven segments mentioned above there is an extra segment to display dot,Which can be useful while displaying non integer number.   The 7 segments are named as A-G and the optional eighth segment is named as H.As you can see in the diagram the seven segment are arranged to form a shape of ‘8’.If all the segments are given the power then the number ‘8’ will be displayed and if you cutoff the power for segment G then it will result in number ‘0’.Similarly you can form the combinat...

Well, hopefully, you aren’t tired of hearing about the Galaxy Note II yet; Samsung has finally made their announcement and released the official details. The leak earlier this morning pretty much had it nailed, but let’s go through the list now that it’s official. Naturally, the screen is the highlight here. It’s an enormous 5.5-inch HD Super AMOLED display at 1280×720. Early hands-on are showing that, while it is perhaps not quite up to the caliber of the HTC One X screen, it is a vast improvement over the Pentile displays we were seeing previously. The other signature feature is the S pen. The handwriting experience in general and that has been upgraded, as well. The pen itself is a bit larger, making it easier to handle, and the digitizer in the Note II supports 1,024 levels of pressure sensitivity–4x that of the original. Powering the Note II is a 1.6 GHz quad-core Exynos processor with 2 GB of RAM. I can’t imagine that won’t be sufficient to keep things humming along. The battery ...

The September 5 event by Nokia and Microsoft could mark the launch of the first Windows Phone 8 devices. It could be the Nokia Lumia 920, which is rumored to pack some of the best hardware till date on a Windows Phone. Now, The Verge is reporting that this new Lumia device could sport wireless charging, 32GB internal storage and an 8-megapixel PureView camera. The Nokia Lumia 920 [ pictured in yellow ] wireless charging support (Qi wireless power standard) could be provided via an inductive method — lining the device up to the contacts on a charging pad. Apart from this, the Lumia 920 is rumored to sport a 4.5-inch HD screen, a dual-core processor, 1GB RAM, an 8-megapixel camera, and 32GB internal storage. The 8-megapixel camera on the Lumia 920 could still be marketed as the PureView camera, even without the 41-megapixel camera. Yet another Nokia Lumia 820  [ pictured in red ]could make its debut alongside the Nokia Lumia 920. According to the latest leaks from EvLeaks (via Twi...

Here’s a simple programmable electronic dice with numeric display . This dice can be programmed using a 4-way DIP switch to display any random number between ‘1’ and ‘2,’ ‘1’ and ‘3,’ ….. or ‘1’ and ‘9.’ To obtain the desired dice range, inner switches A, B, C and D of DIP switch are to be set as per the table. For example, if you want the electronic dice to count from 1 to 8, close switches A and D and keep B and C open. On pressing switch S1, the display varies fast between ‘1’ and ‘8.’ When you release S1, the display stops shuffling and the last (latest) number remains on it. IC1 is a dual 4-input Schmitt trigger NAND gate 74LS13. Gate N1 is used as an oscillator built using resistor R2 and capacitor C1 to produce approximately 70kHz clock frequency, which is fed to IC2. Gate N2 loads data at the inputs of IC2. IC2 is a presettable binary counter (74LS191) with parallel loading facility. Whenever its pin 11 goes low, the data present at its inputs D through A (which is ‘0001’) appe...

A digital dice circuit can be easily realised using an astable oscillator circuit followed by a counter, display driver and a display. Here we have used a timer NE555 as an astable oscillator with a frequency of about 100 Hz. Decade counter IC CD4026 or CD4033 (which-ever available) can be used as counter-cum-display driver. When using CD4026, pin 14 (cascading output) is to be left unused (open), but in case of CD4033, pin 14 serves as lamp test pin and the same is to be grounded. Circuit diagram :   Digital Dice With 7-Segment Display Circuit diagram The circuit uses only a handful of components. Its power consumption is also quite low because of use of CMOS ICs, and hence it is well suited for battery operation. In this circuit two tactile switches S1 and S2 have been pro-vided. While switch S2 is used for initial resetting of the display to ‘0,’ depression of S1 simulates throwing of the dice by a player. When battery is connected to the circuit, the counter and display secti...