Security devices. Schemes, articles of the Free Technical Library

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Security devices. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Security devices

We recommend reading in our Free Technical Library:

Controlling the radio model using a computer

Section Radio control equipment. Probably, no matter how old a person is, he will still be interested in playing with a radio-controlled toy. Let's take a radio-controlled car for example. No? Buy! I understand it's expensive in the store. But in the market where I bought this monster for myself in the winter of 2004, it cost 270 rubles (without batteries). I do not recommend using batteries - batteries are better. I put nickel-cadmium on 800 mlACH for myself. My car supports steering - left / right and forward / backward. That is, there are no inconveniences and restrictions. Doesn't slip on carpet. Overcomes thresholds and baseboards up to 2.5 cm without problems. Speed - a little faster than a step. The durability is excellent. Strange, but the assembly is Chinese. For 270 rubles, I consider it just a godsend ... >>

Avalanche resuscitation (recovery) of batteries

Section Chargers, batteries, galvanic cells. Of course, the chemical processes that occur in galvanic cells during their operation are, as a rule, irreversible, but, nevertheless, it is very tempting to restore at least part of their capacity. The essence of my know-how is that when the charging voltage is 3...4 times higher than required, an avalanche charging process occurs, and even cells that are completely discharged ... >>

Simple heat stabilizer, 1-80 degrees

Section Power regulators, thermometers, heat stabilizers. The device is universal and is designed to maintain a fixed value of a given positive temperature in the range of +1...80 °C with an accuracy of 0,2 °C. The heat stabilizer can be used in an artificial incubator for hatching chickens from eggs (+37,5 °C), a drying cabinet (+60 °C), a home bath, or maintain a positive temperature (+2 °C) in an insulated storage for vegetables on the balcony at negative ambient temperature. In this case, the operation of the device is not affected by possible instability of the mains voltage. The device is powered using a transformerless circuit (Fig. 1.15) directly from a 220 V network, which makes it possible to significantly reduce its dimensions ... >>

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Articles on security devices

Security devices and object signaling
Car security and alarm
Security and alarm via mobile communication
Security and safety. Audio and video surveillance
Security and safety. Personal safety

Security devices and object signaling

Articles on security devices and signaling of objects; schemes of security devices and signaling facilities; descriptions of security devices and signaling facilities: 154 articles

Car security and alarm

Articles on the protection and signaling of the car; car alarm schemes; descriptions of car alarms: 63 articles

Automobile. Security devices and signaling (collection of schemes)

Articles on automobile security devices, car alarms; diagrams of automobile security devices, car alarms; descriptions of car security devices, car alarms: 23 articles

Security and alarm via mobile communication

Articles on security and signaling through mobile communications; diagrams of GSM security and signaling devices; descriptions of GSM security and signaling devices: 10 articles

Security and alarm system via mobile communication (collection of schemes)

Articles on security and signaling through mobile communications; diagrams of GSM security and signaling devices; descriptions of GSM security and signaling devices: 3 articles

Security and safety. Audio and video surveillance

Articles on audio and video surveillance; audio and video surveillance schemes; descriptions of audio and video surveillance: 15 articles

Security and safety. Personal safety

Articles on personal security; schemes of devices for personal safety; descriptions of devices for personal safety: 7 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

Digital 30A DC-DC Regulators IR38263/5 24.12.2018

Infineon has released new IPOL IR38263 and IR38265 series digital DC-DC converters with output current up to 30 A. The converters are designed to power high-performance processor cores and other powerful low-voltage consumers.

The new controllers combine ease of use, high integration and full configuration via fast I2C or PMBus interface. Thanks to the latest advances in low voltage MOSFET technology, Infineon has been able to realize a sufficiently powerful DC-DC with an output current of up to 30A in a small PQFN-24 (5-7mm) package.

The presence of a digital interface makes this solution really flexible. All basic parameters (switching frequency, output voltage, protection thresholds) can be configured using a digital host controller. The digital interface can read input and output voltage, output current and temperature.

Technical specifications:

input voltage range: 5,5...16 V (1,5...16 V with external Vcc supply);
output voltage adjustable from 0,5V to 87,5% of Vin;
rated output current reaches 30 A;
conversion frequency is adjustable in the range of 150...1500 kHz;
Efficiency up to 96%;
Voltage Mode control algorithm (VM Engine Gen3) allows you to quickly process load changes;
setting the output voltage using 3 digital inputs PVID;
the ability to configure parameters via the fast I2C (IR38265) or PMBus (IR38263) interface;
the ability to read the values of the output voltage and load current using the digital interface I2C / PMBus;
operating temperature range -40°С...+125°С;
case PQFN-24 size 5x7 mm.

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