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IEEE Spectrum |
| Posted: 07 Aug 2013 08:32 AM PDT |
| White House to Host Robotics Hangout on Friday Posted: 07 Aug 2013 07:42 AM PDT |
| Bitcoin Startup ArtaBit Working On Cheaper Alternative To Western Union Posted: 07 Aug 2013 06:30 AM PDT |
| Korean Bus Charges Itself While Driving Posted: 06 Aug 2013 11:31 AM PDT |
| How Big a Problem is Methane Leakage from Natural Gas Fracking? Posted: 06 Aug 2013 10:18 AM PDT |
| Electric Car Price Wars Heat Up Posted: 06 Aug 2013 10:05 AM PDT |
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News post : Electronic Projects Circuits :Eleccircuit.com | |
| Posted: 06 Aug 2013 08:21 AM PDT This be Two tone alarm use op-amp IC number LM3900 (Quad Amplifiers) perform produce the frequency square wave 2 level , be high frequency and low then mix the sound in the end danger beep that is appropriate it has can to link up a loudspeaker with ,using power mosfet then have better use transistor [...] |
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IEEE Spectrum |
| Dye-Sensitized Solar Cells Produced Without Iodine Posted: 06 Aug 2013 08:30 AM PDT |
| NASA's Curiosity Rover Turns One on Mars Posted: 06 Aug 2013 07:42 AM PDT |
| The Making of Facebook’s Graph Search Posted: 05 Aug 2013 09:00 PM PDT Engineers who built Facebook's Graph Search tell the inside story of how they made Zuckerberg's dream come true |
| World's First Lab-Grown Burger Unveiled and Eaten in London Posted: 05 Aug 2013 12:59 PM PDT |
| Gold Nanoparticles in Polyurethane Make a Stretchy Conductor Posted: 05 Aug 2013 12:49 PM PDT |
| Hardware Trick Could Keep Cloud Data Safe Posted: 05 Aug 2013 07:00 AM PDT |
| IT Hiccups of the Week: Port of New York and New Jersey’s Computer Problems are Virginia’s Gain Posted: 04 Aug 2013 09:43 PM PDT |
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News post : Electronic Projects Circuits :Eleccircuit.com | |
| Simple slant (tilt) alarm switch circuit Posted: 06 Aug 2013 03:12 AM PDT This is a simple alarm circuit.This work, when the switch S1 (sensor) tilted away from vertical.The alarm stops when the sensor back to the old form. S1 sensor is a mercury switch.Contact is a normal closed.When the switch is placed in a vertical.Transistor Q1 acts as a switch off, buzzer immediately.When the sensor back to [...] |
| Posted: 06 Aug 2013 02:27 AM PDT Operation of the circuit.When pressed, switch S1. Circuits will work out a sound of birds.The R1, R2, C3 forward control transistor Q1 to work intermittently. The capacitor C4 determines the latency time, for each voice singing. In addition, there C2 as the feedback signal.If the C2 is much value,will make the bass sound. However [...] |
| Door buzzer sound with CD4001 CD4060 Posted: 05 Aug 2013 11:48 PM PDT The Door buzzer sound circuit was two-tone sound. With the switch S1. working of circuit,The IC1 is a frequency dividing circuit, and generator a sound frequency came out.by the C1, R1 are the frequency generator. This audio signal from pin 7 and pin 4 into the pin 1 and pin 8 of the IC2a, IC2c [...] |
| Sound bell circuit with ic 8021 Posted: 05 Aug 2013 10:24 AM PDT This is a simple bell sound generator circuit,Power supply 3Volt, and used on small speakers,and there is less equipment to create simple, well offline. Operation of the switch S1 is in ON position to a current flowing into pin 5 of IC.To IC1 by IC1 to work with a sound production IC Ting Tong.When we [...] |
| Posted: 05 Aug 2013 08:50 AM PDT I understand that Simple electronic circuits is very important. My friends used to say the large projects electronics, came from small several electronic circuits to combinations. You would think that this statement is true. And some of your work. Lack of small things. The circuit will allow it to work well. Also for the beginner. [...] |
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IEEE Spectrum |
| Gasbot Sniffs Out Climate Destruction With Lasers Posted: 05 Aug 2013 08:32 AM PDT |
| A Global Alliance for Genomic Data Sharing Posted: 05 Aug 2013 06:45 AM PDT Group aims to prevent the creation of competing standards for analyzing, sharing, and using the flood of data resulting from gene sequencing |
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News post : Electronic Projects Circuits :Eleccircuit.com | |
| Easy stereo VU-meter by KA2284 Posted: 05 Aug 2013 02:43 AM PDT A poor people and the beginners it has a heart. We would like to propose a electronic VU meter projects on economy model that has stereo each side are 5 LEDs This projects, unless will be used as the VU-meter for measure a output of power amplifier. also can be used as the signal meter, [...] |
| Simple-mosquito repellent circuit Posted: 04 Aug 2013 09:00 AM PDT Send sound waves as mosquito repellents by generating a small sound frequencies on transistor based bistable multivibrator. Which is economical and safe. In the use of chemicals. Mosquitoes, in addition to the already annoyed. Also carriers of pathogens that cause harm to human beings. Which normally we get rid of mosquitoes with chemicals. It has [...] |
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