Security device with iButton keys and shock sensor. Scheme, description

Free technical library

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

Security device with iButton keys and shock sensor. 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

This device uses a shock sensor and a siren from an APS car alarm (sold separately in car dealerships), as well as two limit switches (optional).

The shock sensor is installed on the front door and has two levels of operation

Light hit - without waiting for an intrusion into the territory of the object, the device warns the intruder with four short beeps (like a car alarm).

Strong impact (or triggering of the limit switch) - in case of a strong impact or triggering of the limit switch, the siren turns on for 5 seconds. and then comes dialing to the programmed phone number, dialing and calling continues for 25 seconds, this time is enough for 5-6 ringing, then reset. when the tube is raised, a siren sounds in it and it becomes clear that the object is being attacked. If the shock sensor continues to be subjected to strong shocks, the siren turns on again for 5 seconds and dials again, etc. If, after dialing, the shock sensor is not subjected to shock, then after 45 seconds a control call is made, then the device switches to armed mode. When the power is removed in the armed mode and connected again, the device remains in the armed mode, and if the power was removed after the operation, then when the power is turned on, a test call will be made after 1 minute.

Arming is done by touching the key (a short signal sounds and the LED starts flashing) Shock sensors and limit switches are monitored (short to ground).

Security device with iButton keys and shock sensor. iButton

Removal is similar to staging (two short beeps sound, the LED goes out) during the dialing process, the LED lights up constantly; disarming is not possible at this time. Key panel with LED and siren installed outside. For programming the microcontroller and connecting external devices, I used one connector. I was going to use the shaded area of the diagram for the analysis of a telephone line but did not use it temporarily. The telephone line is connected first to the device and then to the telephones at the object. When triggered, all telephones of the object are turned off.

Security device with iButton keys and shock sensor. Device diagram

Code from iButton should be entered starting from the address 02D8 in this order 01 2B C5 FB 00 00 00 66 in order, you can enter up to six keys for every eight bytes. Phone number entered starting from the address 04CC maximum eleven bytes (digits) e.g. record FF FF FF FF 01 02 06 02 05 0A 0A matches the phone number 1262500, for a digit 0 enter code 0А according to documentation for HT9200A. All unused bytes must be filled with FFor 1F

The area highlighted in black for entering six iButton keys:

Security device with iButton keys and shock sensor

Bytes for programming the phone (phone 50085 is listed in the figure)

Security device with iButton keys and shock sensor

FILE signal_offise.bin

Below is a diagram and photos of the manufactured devices.

Security device with iButton keys and shock sensor

If you want to change the time intervals, for example, the siren sounding time or the dialing time, write to neyvert@mail.ru, I will make changes to the program and send it to you. I will also answer all questions and listen to all comments or suggestions!

Author: Neivert Sergey; 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

Signal transmission through human tissue 13.04.2020

A team of developers from Finland has demonstrated the operation of a method of signal transmission to implants placed inside biological tissue that is safe for living organisms. The signal cannot be intercepted, blocked or changed from a long distance.

Professor Marcos Katz of the University of Oulu has led research for many years to find alternative ways to communicate. In 2017, together with colleagues, the scientist developed a hybrid communication channel that can smoothly switch between the transmission modes of radio waves and waves in visible light using VLC (Visible Light Communication) technology. The channel operation mode depended on its state and transmitted information.

When testing, the radiation wavelength was increased from a few millimeters to several centimeters and found a good connection even for deeply located implants. The external signal source was located at a distance of several meters from the "body".

The first results - 10 kilobits per second - did not please scientists too much. Then she increased the number of receivers / signal sources, conjured over modulation schemes and received a multiple increase in the transmission rate.

The technology of transmitting a signal using infrared radiation is useful not only in communication applications. The VLC can be used to control, for example, pacemakers and defibrillators. At the same time, radio interference or someone's malicious intent will not be able to cause the failure of this vital equipment.

It is with the use of technology in the medical field that the future research of the Finnish team is connected. The developers hope to contribute to the development of methods for diagnosing and treating diseases, as well as controlling devices implanted in the human body. It remains only to better understand the biological tissue as a conducting medium for infrared radiation.

Other interesting news:

▪ Inkjet printing for pennies

▪ Smart toothbrush ISSALEXA

▪ ATSAMR34/35 - LoRa radio plus Cortex-M0+ MCU for IoT

▪ Nanomagnets purify the blood

▪ LG Smartphone

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Factory technology at home. Article selection

▪ article Gehenna fiery. Popular expression

▪ article Where and when was aviation born? Detailed answer

▪ article Movement in desert areas. Tourist tips

▪ article Electronic-mechanical drive of the fuel pump. Encyclopedia of radio electronics and electrical engineering

▪ article Electric equipment of elevators. Protection. 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