Audio engineering. Schemes, articles of the Free Technical Library

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Audio engineering. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Audio equipment

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Prefix octane-corrector for a car

Section Car. Electronic devices. The schematic diagram of the device is shown in the figure. The prefix consists of a DA1 timer, a delay switch on transistors VT1, VT2, a transistor switch VT3, VT4 and an oscillator on the elements DD1.1 -DD1.3. After the power is turned on, the transistor VT2 will be closed. The mode of the transistor VT1 is selected so that when the transistor VT2 is closed, it is open. If the SF1 contacts of the breaker are closed, then the voltage at pins 2 and 6 of the DA1 timer is close to zero, and at pin 3 there is a signal corresponding to a high level. Under the action of this signal, the transistor VT3 is open, i.e., the state of the transistor key is equivalent to the closed contacts of the breaker for the ignition unit. At the first moment after opening the contacts, the DA2 timer pin 1 will have a 1 signal, and the 6 signal at pin 0, since the capacitor C2 is discharged ... >>

Voltage converter for powering a photomultiplier

Section Voltage converters, rectifiers, inverters. Here, a voltage converter is described, designed to power a photomultiplier, which is part of a sensitive radiometric complex. Circuitry solutions embedded in the converter can be used in the development of stabilized power supplies for many other electronic devices. The converter, the circuit of which is shown in fig. 132 provides 1000V output ... >>

Electronic volume control on the KA2250 chip

Section Tone and volume controls. Now I will tell you how to make a push-button two-channel volume control on just one chip. There is such a Korean office - Samsung. This office produces unremarkable household crafts like mobile phones and tanks. But they also have something nice to offer. This time it's the KA2250 chip. ... >>

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Articles on audio technology

Articles on audio engineering; audio equipment schemes; descriptions of audio equipment: 191 articles

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

SEAGATE hard drives in TOSHIBA video recorders 18.09.2003

Seagate Technology announced that Toshiba, the largest player in the consumer electronics market, has selected Seagate Consumer Electronics hard drives for its RD-XS31 HDD&DVD recorder.

This is the industry's first DVD multi-drive video recorder. This Seagate hard drive will allow the RD-XS31 to record up to 104 hours of video. In addition, the HDD can be used as a buffer for later distillation of video to DVD-RAM, DVD-RW or DVD-R discs.

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