The availability of modern element base used in television remote controls (remote control), allows you to create a simple counter connected to the receiving side of the computer LPT port, adapting all this to count, such as boxes with finished products on the conveyor.FOTOSKETCHER ON LPT
The availability of modern element base used in television remote controls (remote control), allows you to create a simple counter connected to the receiving side of the computer LPT port, adapting all this to count, such as boxes with finished products on the conveyor.
I want to share my version of the functional generator frequency sweep for the home lab. Consuming from the electrical power source 50 mA, is a compact, fairly simple to manufacture, the device generates periodic signals are sinusoidal, rectangular, triangular, and rectangular pulses for testing and tuning of the instrument, made on modern element base.
The agricultural theme, perhaps the most characteristic in the work of young radio Amateurs from syut Novosibirsk region. 14 new products — electronic devices for agriculture — provided they are meeting in Magnitogorsk. The originality of technical solutions, the relevance of development of children marked by the true: the majority of devices are awarded with diplomas and valuable prizes.
The weight started with the fact that the employee of the bell States telephone laboratories in new Jersey (USA) D. Hagelbarger created in the early 50-ies of the cybernetic device to play the so-called “coin”.
Check slabovidimym acoustic signals is of great practical importance. This: fault diagnosis of internal combustion engines; search for places of leakage of gas from the damaged pipeline networks; early detection of diseases of internal organs; organization of acoustic communication and alarm systems; capture seismography, noise of different origin, including sounds of nature (birds singing, for example) and many more.
Most of the machines and mechanisms used in industry, agriculture and the service sector, by themselves, unfortunately, still not working. These mechanisms have to enable, disable, change their speed and direction of movement, etc., it is necessary to control their work.
In school museums or at exhibitions of young artists in the role of a tour guide may carry a tape recorder. Explanatory text in advance is recorded on a magnetic tape. It remains only to choose the right place in the tape and the tape will tell about a particular exhibit. But here’s the problem: no experience to do it sometimes difficult.
The use now many are addicted. Almost PI one radioactive not complete without high quality playback equipment. And the shelves are not empty radiomatinal: the attention of buyers offered a selection of “stereospondyli”.
His good-natured face is loved by children. Especially good “eye” — a bright, green and… crafty. The cat all the time “wink” — his pupils are then compressed, then expand.
Digital multimeter in a new role. Inexpensive digital multimeters M-830В today widely used not only in industry but also in everyday life: for example, to measure the voltage in the network or at the terminals of the battery, the “continuity” of electric circuits. Supplemented with consoles, developed by radio Amateurs, they also find application in the measurement temperature, frequency of rotation of the motor shaft…