Electronic lock with control from iBUTTON tablets. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Electronic lock with control from iBUTTON tablets. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Security devices and object signaling

Comments on the article

Below is a diagram of a lock using Touch Memory electronic keys of the DS1990A type. The device is assembled on the basis of the PIC16F628A microcontroller.

(click to enlarge)

Operation of the device

To write keys to the device, close the jumper "PROG". While the jumper is closed, the keys read by the device will be written to the device's memory. Already existing keys are not written. The maximum number of stored keys 20 pc.

To erase all keys from the device memory, shortly close the "RESET". The LED will light up for 2 seconds.

When reading the existing key in the memory, the device opens the lock and keeps it in the open state 5 sec. When the door sensor opens, it stops counting this time and closes the lock.

jumper"Lock type" the logic of the lock operation is selected, i.e. in the normal (closed) mode of the lock, the voltage on the lock hangs or not. When opening, the voltage on the lock is inverted.

Firmware can be downloaded here

The author accepts orders for the development of devices based on MK

Author: Alexey Klyushnikov, Ivanovo, al.kl [dog] mail.ru; Publication: cxem.net

See other articles Section Security devices and object signaling.

Read and write useful comments on this article.

<< Back

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

Sensors on icebergs will detect submarines 30.09.2012

A new project of the defense scientific agency DARPA could seriously complicate the combat duty of Russian nuclear submarines. The Americans plan to install sensors on the floating Arctic ice. This will create a relatively low-cost wide-area monitoring network that can track multi-purpose submarines and ballistic missile submarines, which form the basis of an assured nuclear response by the US, Russia and the UK, and in the future, China.

Arctic ice is melting faster than ever, meaning more military and commercial activity is expected in polar waters. It is also an ideal location for strategic weapons submarines, as it is easier for them to hide under a thick layer of ice and among the noise of colliding icebergs and the crackling of ice crust breaking.

That is why the Pentagon decided to create a network of sensors for year-round monitoring of the Arctic situation. It is planned to use floating icebergs, on which magnetic sensors will be installed on top and acoustic sensors below. Icebergs cover a distance of up to 6 km per day, which makes them a suitable patrol vehicle.

This program called Assured Arctic Awareness (AAA) can seriously undermine the balance of power on the world stage. The fact is that nuclear submarines are the only type of strategic weapon that has the highest stealth and firepower. With an ammunition load of 16-20 intercontinental ballistic missiles with 5-10 nuclear warheads each, even one nuclear submarine can cause serious damage to a large state. At the same time, the most effective types of missile defense, which intercept ballistic missiles at the time of launch, are powerless against submarine missile carriers - it is very difficult to track the location of a submarine.

If the Americans manage to create a network of cheap mobile sensors, then at least one region for strategic missile carriers will be closed. According to some reports, Science Applications International has been working on such a network since 1990, although this work is mainly aimed at creating cheap floating sensor buoys.

Other interesting news:

▪ PWM stabilizer with sequencer and auto-tracking

▪ Under the gaze of the machine

▪ Dual GPU Nvidia Tesla K80

▪ Sugar addiction

▪ MESO instead of CMOS

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Measuring equipment. Article selection

▪ article Like a squirrel in a wheel. Popular expression

▪ article With which two doctors, besides Dr. Watson, is the character of Sherlock Holmes closely related? Detailed answer

▪ article Washing and cleaning unit operator. Job description

▪ article Possible problems with electrical wiring, the procedure for their elimination and prevention. Encyclopedia of radio electronics and electrical engineering

▪ article A simple source of emergency power. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews