Musical phrase generator on integrated timers. Scheme, description

Free technical library

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

Musical phrase generator on integrated timers. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Telephony

Comments on the article

The Type 555 Universal Integrated Timer has another use in a cheap music synthesizer that plays musical phrases from simple songs. This uses two timers: one generates the rhythm, and the other generates tones.

The circuit shown in the figure acts as a telephone buzzer, it plays the first 10 notes of the song "Beautiful girl, like a melody". When the control input of timer 1 is connected to the supply voltage Vcc, the melody is repeated continuously.

(click to enlarge)

Tone frequencies for the song "Beautiful girl, like a melody"

Account	Tonal capacitor, microfarad	frequency Hz
0	0,042	329
1	0,040	349
2	0,038	370
3	0,033	440
4	0,038	370
5	0,036	392
6	0,034	415
7	0,033	440
8	0,027	523
9	0,033	440

A music synthesizer based on two integral timers plays a simple 10-note song. Timer / sets the rhythm of the melody, and timer 2 generates tones. When the control input of the timer is connected to the power bus, the melody is repeated continuously. The position of the switch "Style" determines the sharp or smooth transitions between notes.

General Telephone and Electronics (Clearwater, Philadelphia)

Literature

Electronics No. 8, 1974

Publication: N. Bolshakov, rf.atnn.ru

See other articles Section Telephony.

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

Tram line with a section without a contact network 31.03.2023

In Warsaw, the first tram line in Poland was launched with a section without a contact network, which will be served by Hyundai trams. 30 vehicles will run on the line.

A total of 123 trams have been ordered from the Korean manufacturer, 80 of which have already arrived in Warsaw.

Hyundai trams use supercapacitors, that is, modern energy storage devices. It is noted that this is not a battery, but a completely different technology.

The wagons can move in separate sections with lowered pantographs - without receiving electricity from the contact network.

As explained in the Warsaw tram administration, part of the contact network had to be dismantled on the modernized tram line. Normally, this would have brought traffic to a halt on the site. But thanks to the new trams, it is now possible to continue transporting passengers on the route.

Trams run on the line every 8 minutes during rush hour and every 12 minutes during off-peak hours.

Other interesting news:

▪ Household DNA analysis and pollution level sensor

▪ The pants of the emperor are being studied

▪ Oil electrorefining

▪ Loose boots

▪ Inexpensive way to clean the air from carbon dioxide

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Dosimeters. Selection of articles

▪ article Non-Euclidean geometry. History and essence of scientific discovery

▪ article How, according to the views of the Pelasgians, did the Universe originate? Detailed answer

▪ article Warehousing and Distribution Manager. Job description

▪ article Electronic password. Encyclopedia of radio electronics and electrical engineering

▪ article The viewer has more cards. Focus Secret

Leave your comment on this article:

All languages of this page

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