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Hello, Friends hope all of you playing with your arduino and currently need to try to do another cool projects on arduino. Therefore, this tutorial is for you. During this tutorial, we interface LDR(Light dependent Resister) with the arduino board. It is very simple tutorials for arduino students, hobbyist, and beginners. Before going more we must find out how LDR is dependent on Light. What is LDR  LDR(Light dependent Resister) or a photoresistor is a light dependent variable resistor that resistance decreases with the increase in the intensity of light. This gives an analog value so that it is connected to an analog pin of arduino board. A simple LDR is shown within the image and to buy an LDR click on the below image Circuit Diagram A simple circuit diagram is shown in the image. We won't use LDR directly within the circuit in order that a potential divider circuit is used with a 10K resistor. In this circuit one pin of LDR is connected to Analog pin A0 of arduino UNO and one p

What is Net Neutrality? In simple terms, Net neutrality means if we are paying ISP (Internet Service Provider) for data, then we should be free to decide what to browser, and must not be decided by ISP. As per the new norms of TRAI (Telecom regulation authority of India), you will have to pay additional charges for Whatsapp, facebook etc etc apart from your normal data plan. Moreover ISP will decide the speed of the site. that means, if any company say facebook.com has paid your ISP, then facebook.com will get Read more »

I saw Justin's recent post on Alpha Clock Five and I just couldn't resist not to try it myself too. Since I didn't have that clock, I thought of improvising one by making a 5-character display that would plug into my Wise Clock 4 board. The idea was easy, the implementation not so. After many hours of hand-wiring, this is how it looks like. The displays are 1" single digit alphanumeric  (common anode) from sparkfun, now retired. They came with non-functional dots, probably the reason they were less than $2 each. The spacing between the individual displays is forced by the protoboard. The 2 boards are connected through the pairs of 2x8 headers. All pins used by Alpha Clock 5 to drive the displays are wired to the unused header on the Wise Clock 4 board. Not to mention  that the software compilation and upload worked without any glitch (after downloading the very nice  DS1307RTC library ) The only regret is that this clock lacks seconds. One extra display would have a

We all are aware of custom characters used in the various display module.Heart, various style of smileys, arrow are the foremost usually used custom characters. Thus, during this tutorial, we are going to learn how to display custom characters in LCD using arduino UNO board. This project is done by using of arduino UNO board and 16*2 LCD module. Custom Character Display It is assumed that reader knows  how to interface LCD with arduino  and  how to install arduino software .We can generate a completely different style of the custom character using the below pixel array shown in the image.  Pixel array the custom character shown below that is used in our program to generate the smile type character:          {                 0b00000,                 0b00000,                 0b01010,                 0b00000,                 0b10001,                 0b01110,                 0b00000,                 0b00000               }; Circuit diagram: Circuit Diagram Source Code: Download: Download