Repository-circuits
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ABSTRACT The aim of the project is to avoid vehicle collision. We can avoid these things by using ultrasonic anti-collision instrument. This instrument is fixed in front side of the vehicle. If any vehicle or obstacle comes near by this vehicle...
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The Clavioline is an early electronic keyboard instrument, similar to my Hammond Solovox. Both of them are monophonic (single voiced) and tube powered, consisting of a keyboard and an amplifier. The first photo shows my Clavioline after restoration. In the....
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If you haven`t already read my CT-100 restoration article, I suggest that you start there. It chronicles how I found a CT-100 and restored it to working condition. This article discusses what`s under the hood. After noting some hardware highlights, we`ll....
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Many antique radios run on batteries. These include tube portables, such as the Zenith model K-401 shown below, and "farm" radios, which were used in rural areas where there was no other source of electrical power. This article gives you some history on....
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This project combines two popular themes from radio history ”crystal radios and shortwave (SW) listening. It`s designed from scratch by our non-resident engineer Walter Heskes. Despite all of the advances in modern electronics, there are thousands of crystal....
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Black Beauty" is my nickname for this classy Bakelite set. Sporting a dramatic, assymetrical design, with deep wraparound louvers and a bullet-like profile, it`s a great example of 1940s Streamline design. Definitely a keeper, in other words! I`m restoring....
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I am not a great fan of novelty radios, but this one looks swell on the wall and doesn`t take up any shelf space. The Guild "Country Belle" is one of the most recognizable tube novelty radios. Patterned after an old-fashioned wall telephone, this model was....
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After we published the original Li`l 7 AM Transmitter plans, fellow experimenter Scott Todd sent us information about his design for a similar portable, battery-powered transmitter. -Original Message- From: Scott Todd Sent: Wednesday, April 12, 2000 8:58 AM....
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When I spotted this April, 1955 issue of Popular Electronics magazine at a swap meet, I practically left burning rubber on the floor as I rushed over to grab it. Theremins have always interested me, and I had been seeking this issue for a long time after....
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Mercury, Oldsmobile, Plymouth and Pontiac cars, muscle cars and antique Classic Car Wiring is constantly adding available diagrams to this site. Here is the wiring diagram Porsche 911L engine for the 1968th car model This pattern has already changed since....
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As the number of stations increased and the power levels also increased; receiver performance had to improve. The pentagrid converter, such as the 6BE6 tube (British EK90 valve), was introduced which was optimized for mixer performance. This included the....
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This simple circuit switches on a light around 2 hours after midnight, the time at which most of the robberies taking place. This simple circuit is build around a CMOS IC 4060 to obtain the required timing. During day time the LDR has low resistance and....
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With IC SLB0586A from Siemens you can build a simple touch light dimmer circuit that will allow you to adjust the lamp intensity. Together with a TIC206D triac, it enables smooth regulation of light intensity from a bulb of 10W 400W. A coil of 100 µH/5A is....
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The world is going nuts over the Raspberry Pi single-board computer (SBC) for being a whole system under $50. In reality though the Pi isn`t actually the cheapest computing device available. If you want really cheap how does $13. 50 sound for a mini computer....
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So far the idea has been to show you how the Arduino Uno board and its Atmel ATMEGA328P microcontroller can interact fairly simply with the outside world. This time we`re simplifying the electronics but ratcheting up the demands on the microcontroller by....
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So far in this series we`ve had a diverse look at how Arduino can interact with a range of real-world devices from servo motors to ultrasonic range finders TVs to humidity sensors. Now we`ll see if we could get the Arduino to make a few sounds. We`ll....
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In the present era, the various technologies we can see. On average, every three months there is a new technology. So not supprisingly, with so many unique and innovative equipment trigerred. Car`s radio without antenna are our project. This is an idea....
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this is a rather common cookbook circuit that you can find in books and on the net, yet personally i have yet to see it in stompbox circles, so i thought i would post it. it uses an npn JFET DC coupled with a pnp BJT . the FET allows a a much higher input....
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This package contains the schematic for an FM transmitter with 3 to 3.5 W output power, and can be used between 90 and 110 Mhz. Although the stability Although the stability isn't so bad, a PLL can be used on this circuit. This is a circuit that I've build....
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The Rockwell Jupiter TU30-D140 is a OEM (Original Equipment Manufacterer) GPS receiver module that is designed to be implemented as part of a larger design, like a vehicle tracking system, navigational system, time/clock reference etc. This is a 12....
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The following schematic diagram is four hour timer circuit. Feature : easy to build, 3 hours 53 minutes total time, 9V supply voltage. Component : 555 timer IC, Resistor, capacitor, switch, transformer, LED, CD4040B, Relay, BC547 transistor, 1N418 diode,....
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The following circuit is PC thermometer using DS1621. Feature : plug in any free PC com port, range of -20 to 125°C, Centigrade (°C) of Farenheit (°F) scale, basic accuracy and resolution 0.5°C, readable data log, sampling rate 1, 5, 30 or 60 seconds, basic....