Taking Down Forums in CircuitsToday

jojo August 27, 2013 2 Comments
Hi Friends,  2 years before, we have launched Forums in CircuitsToday with great expectations. However due to lack of time on our side, we failed to monitor the forums properly. Above all the software we bought to power forums was too susceptible to spam activities. We had a tough time dealing with “automated spam” activities in forums. In 2 years time, the forum was dominated by spammers than real users. This was an unexpected and hard situation. Though we...
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Digital thermometer using 8051

admin December 13, 2012 45 Comments
Thermometer using 8051. This article is about a simple 0-100°C digital thermometer with 1°C resolution using 8051. The circuit is based on LM35 analog temperature sensor, ADC0804 and AT89S51 microcontroller. LM35 is an analogue temperature sensor IC which can measure a temperature range of -55 to 150°C. Its output voltage varies 10mV per °C change in temperature. For example, if the temperature is 32°C, the output voltage will be 32 x 10mV = 320mV. ADC 0804 is used to convert...
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The Facebook Wall Caption Contest – Winner Announced

jojo June 19, 2012 3 Comments
WINNER ANNOUNCED Hi friends, The winner is – Indrajit Biswas (http://www.facebook.com/indrajit45) We have contacted him over Facebook. Now awaiting his reply. Here is the screen shot of winning selection. Hello friends,  We are back with a cool contest using Facebook. This contest is open for any one with a Facebook account.  You only need to do two things to be a part of this exciting contest. 1) Like our website’s page in Facebook – here – CircuitsToday Facebook Page ...
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Indian ISP Reliance and Airtel blocks Torrentz Dailymotion Vimeo and many other websites

jojo June 5, 2012 5 Comments
The Indian ISP’s (Internet service providers) like Reliance and Airtel blocks many popular websites like Torrentz.eu (and many torrents file sharing websites), video sharing sites like Dailymotion, Vimeo and many other popular, useful websites. When you try to access these websites from an Airtel connection – it reports “Access to this site has been blocked as per Court Orders”. But in fact this “blocking” is based on an order from Telecom department of India as per the TheNextWeb report....
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Open Source Hardware will revolutionize the way we learn Electronics

jojo March 31, 2012 5 Comments
At CircuitsToday, our vision is to freely distribute electronics knowledge. Now that means, we want any one with an interest in electronics to learn as much as he would like. We make this easy by giving away free content in the form of practical circuits and theoretical explanation. In a way we can be called as an “open source” but not exactly! We have not associated this website with any open source movement so far. For all these years...
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7 segment display driver

admin March 27, 2012 14 Comments
7 segment display. Seven segment display is a device that can display decimal numbers and are widely used in electronic clocks, electronic meters, digital display panels and a hand full of  applications where numerical data is  is displayed. The idea of seven segment display is very old and they are in the scenario from early nineteenth century. Seven segment display have seven segments which can be individually controlled (ON/OFF) to display the desired number. Numbers from 0 to 9...
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The History of Electronics-Infographics

jojo March 16, 2012 9 Comments
Hey guys, Ever thought how the world as we see it now evolved? How came great inventions and discoveries? What were the reasons behind all these great inventions like Diodes, Transistors, IC”s and Micro computers? Here we have developed an Infographics (representing information with the help of graphics) which shows the “History of Electronics”. Note: To view the image in full size – Click on the image or Right click on the image and press “Open Link in New...
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CircuitsToday Launches Forums and Crossed Ten Thousand Subscribers

jojo July 19, 2011 7 Comments
Greetings to everyone 🙂 This is a day of celebration for everyone here at CircuitsToday. Today, we achieved a milestone of 10,000 daily E-mail subscribers. At this joyous moment, we are announcing the launch of  our new Forums – Community of Electronics Professionals,Students and Hobbyists. The community portal is divided into different sections with specific purposes as described below: The Electronics Forum: This section is a general type forum to discuss in general about electronics. “The Electronics Forum” features...
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Voltage Limiter Circuit Using Op-amp

john June 10, 2011 11 Comments
An op-amp is usually used as a comparator in cases where its speed and accuracy are not critical. As illustrated in the earlier post (OP-AMP COMPARATOR), the switching speed of the op-amp comparator can be improved and noise can also be eliminated. The offset problems can also be reduced by adding a voltage compensating network and a offset reducing resistor. Since the op-amp is originally designed to act as an amplifier, its output will not act linearly with logic...
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Prize Received by Winner of the Contest

jojo February 14, 2011 1 Comment
Hello all Readers, You all might be still remembering our highly successful “Suggest a Topic to Publish” contest. As you all know, we have received over 217 valuable suggestions. We have published some of the suggestions already and still working on others. You are still welcome to suggest new topic ideas,eventhough the contest is over. Later we have ” Announced Winner of the Contest ” and was Mr.C.Subrahmaniam from India. We have contacted him via E-mail, collected his address,...
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