6 Channel Auto Reverse Sequential Disco Running Lights [pic] From 230 V AC a DC supply of + 5 V is obtained. The power supply is given to the other blocks. The pulse generator at a particular frequency generates the clock pulses. The clock pulses are counted by a counter and gives output after every 10 pulses. The counter drives the transistors‚ which form the triac firing circuit. The transistors fire the triacs and they provide sufficient current to the load. Decorative
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The graph description of the table on the Participation in Selected Leisure Activities of Girls and Boys |Leisure activities |Girls age 5-14 |Boys age 5-14 | |Skateboarding or rollerblading |25 |39 | |Bike riding |58
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These advantages may not be obvious or observed in short period of times. However there are some impacts on the usage of the electronic devices and gadgets games. According to the sources from a survey of Kaiser Family Foundation‚ children are spending an average of more than 7 hours per day on the electronic device which includes television‚ electronic games‚ internet and some mobile devices. These data show that‚ kids today are easily used up more than 50 hours weekly‚ which means the time
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Watching television is an experience shared by most people. It is cheap‚ appealing‚ and within the reach of almost everyone. In this way‚ TV has become an important mass media around the world. Sadly‚ this resource isn’t used in a way that people could get the best possible benefits from it. TV has also become one of the worlds most PREDOMINANT bad habits. The purpose of this essay is to persuade the reader that people shouldn’t watch too much TV because a lot of TV programs are not educational;
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The schematic of an automatic cooler fan for audio amplifiers is given here. The circuit automatically switch ON the cooler fan whenever the temperature of the heat sink exceeds a preset level. This circuit will save a lot of energy because the cooler fan will be OFF when the amplifier is running on low volume. At low volume less heat will be dissipated and it will not trigger the cooler fan ON. The temperature is sensed using an NTC (negative temperature coefficient) thermistor R2. Junction of
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Why are humans so obsessed with screens? Every day people are spending their time playing on their mobile phones‚ watching television and sitting in front of their computer. How larger the screen‚ how bigger the fun‚ phones are getting larger and larger and watching TV is no fun on a small television‚ and why else would you go to the cinema if it’s not because they have an enormous screen? In the first place‚ people want to escape from the reality for a moment‚ so than they can watch a movie
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Global Social TV Market worth $256.44 Billion by 2017 According to a new market research report‚ “Social TV Market: Global Advancements Forecasts & Analysis (2012 – 2017)”‚ the total Social TV market is expected to reach $256.44 billion by 2017 with a CAGR of 11.2%. Browse 62 market tables and in-depth TOC on “Social TV Market: Global Advancements Forecasts & Analysis (2012 – 2017)”. http://www.aarkstore.com/reports/Social-TV-Market-Global-Advancements-Forecasts-Analysis-2012-2017--228908
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circuit ideas Hearing aid IVEDI S.C. DW T.K. Hareendran T his low-cost‚ general-purpose electronic hearing aid works off 3V DC (2x1.5V battery). In this circuit‚ transistor T1 and associated components form the audio signal preamplifier for the acoustic signals picked up by the condenser microphone and converted into corresponding electrical signals. Resistor R5 and capacitor C3 decouple the power supply of the preamplifier stage. Resistor R1 biases the internal circuit of
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My Ideal Computer System What kind of computer system would you build if money was no object? The system I would love to have with make watching video‚ listening to music and playing games easy to do. It will also include home automation. My ideal computer system as today would include a Dell Precision R5500 with a lot of bells and whistles added to it. The computer will have a Dual 6 core Intel Xeon processor (2.66 GHz‚ 12m L3‚ 6.4 GT/s turbo). It will have two 6 GB nVIDIA Quadro 6000
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From technological points of view‚ we are in a marvelous age. Nowadays‚ TV as a product of technology has turned to an integral part of our lives. This issue that “TV has bad effects on children “is a controversial one and can be approached from different angles due to its complexity; but in my opinion‚ a closer examination reveals that new generation is growing up addicted to the TV as it has never been truer than it is today . Especially‚ it has very bad effects on children. We can consider negative
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