House call from a cell phone. Scheme, description

Free technical library

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

House call from a cell phone. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Calls and audio simulators

Comments on the article

In the markets, there is often a children's toy - "cell phone". One of its buttons, in my instance it is "1", has an interesting logic associated with it. Until you press the button three times, the melody will not play. This option allows you to turn the toy into a combination lock-bell.

House call from a cell phone

The essence of the alteration is clear from the figure: you need to solder two insulated wires to the printed conductors going to the "1" button and connect them to the doorbell button (SB1). To use such a device, you need to warn friends and acquaintances about the "code" of the call. Then the first two presses of the button will not lead to anything, and after the third, a melodic sound will be heard in the apartment. Only the third time the button should be pressed no later than two seconds after the second pressing. Otherwise, the whole procedure will have to be repeated.

Author: V.Smirnov

See other articles Section Calls and audio simulators.

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

Less and less laptops are being bought 28.04.2014

Analysts at Digitimes Research have calculated that global notebook shipments in the first quarter of 2014 were down 14,2% from the last quarter of 2013. On an annualized basis, there was also a drop: compared to the first quarter of last year, shipments decreased by 5,5%.

Digitimes Research does not provide specific figures for notebook sales, but notes that the rate of decline in sales has slowed somewhat compared to previous quarters.

It is reported that Hewlett-Packard, ASUS, Apple and Lenovo in the first quarter of 2014 showed an increase in shipments year on year, with the first three of these companies increasing shipments by more than 10%.

At the same time, Acer, Samsung Electronics and Sony experienced sales declines that were larger than the market average. In the case of Acer, this is due to business restructuring, while Samsung and Sony have been focusing on other products.

The statistics of Svyaznoy also speaks about the reduction of the notebook market. Thus, in the first quarter of 2014, sales of laptops and netbooks in Russia in unit terms decreased by 36%. Revenue from sales of such computers fell by a quarter. Moreover, netbooks are actually disappearing from the Russian market.

Other interesting news:

▪ HVER Stealth mechanical keyboard

▪ Origin of the domestic cat

▪ PWM stabilizer with sequencer and auto-tracking

▪ New power supply 0 to 32 V

▪ Smartphones as modular constructors

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the Electrician website. PTE. Article selection

▪ article by Al-Farabi. Famous aphorisms

▪ article What is mistletoe? Detailed answer

▪ article Soleros european. Legends, cultivation, methods of application

▪ article 144 MHz Antenna. Encyclopedia of radio electronics and electrical engineering

▪ article Scheme, pinout (pinout) of the Motorola T191 cable. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Comments on the article:

Vlad Sabitov
It’s understandable with the toy, but for a private house there is a problem with wires. Is there a scheme for using a cell phone for this purpose, even with a SIM card. Maybe somehow you can adapt the shortcut button?

All languages of this page

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