(The end. The beginning in № 4, 1976) the design quality of stereoleto, the description of which we offer readers, the outer shell of the ear cups made of artificial leather of black color. They are made on a wooden model-the matrix (Fig. 1). The hole is carefully cut out with a jigsaw, and the cut portion is used as a punch. Faux leather cut out a rectangle the size 180X160 mm, remove the knitted lining and evenly stretch the skin on the model, fixing the lower side of the stationery buttons. Then the product is heated to 70— 90°, push in and a punch in the matrix, stand in this condition until cool. Then punch with the buttons removed and the shell removed. On retinectomy frame (Fig. 2, POS. 2) glue 88H glued the foam and cut it in the shape of the ear pads. Thereafter, the sheath is stretched over the foam and glued to the bottom of the frame with glue BF-2, first external perimeter and then the inside. Decorative grille — from pocket radios. Glue it to the frame last.
STEREO PHONES
More lovers of mushrooms and berries prefer to reach remote treasured areas rich in forest, on their “steel horses”. Leaving the car somewhere under the lush foliage. any tree, fond of “quiet hunt” so much that sometimes lose orientation “in time and space.” And the result is the joy of communication with nature — a tedious search of the vehicle, left unattended.
In high quality stereorelease made on the basis of heads 0,25 GD-10-290 from small radios. Their advantages are a wide frequency range, small harmonic distortion comfortable ear cushions earpads, good isolation from extraneous noise and beautiful appearance.
Many years used the intercom system with loud-speaking simplex communication, consisting of a main panel and linear unit connected between a two-wire line. The radio was mounted low frequency amplifier. Here was the power source.
Any motorist knows that the state of charge of the battery must constantly monitor is required to control the pressure on it. This can be done by using electronic circuit which gives an alarm when low electrolyte level, high overload, contamination of the terminals of the battery, breakage of the drive belt of the generator, the overcharge of the battery.
In Amateur practice when developing or building a device often require multiple power sources at different voltages. For example, structures made in operational amplifiers and working in conjunction with digital integrated circuits require the bipolar and unipolar current sources. To use in such cases, the voltage divider is uncomfortable, especially in the process of developing new devices. After all, it is necessary to change the number of elements used and their type, which leads to a change of energy parameters of the device, and hence to necessity of the divider.
E-the guard mounted on the car “Lada”, emits intermittent alarm signals if someone opens the door, hood or trunk of a car.
In the staff room phone rang: asked physics teachers. Some of those present said: “Now it’s in the shop”. How to be? Because the school has no internal telephone communication and without the “intentional” here, perhaps, is not enough.
Today, phone operators, representing a population of mobile communication services, even in remote regions have made their rates available to most consumers. Constantly updated market of mobile telephones (AIT) allowed to acquire outdated but workable model for a symbolic price. Given this, anyone who is familiar with the basics of electrical engineering are given the opportunity to make the mobile phone almost free, automatic Secretary, who will notify the owner about the state of its protected values; whether it be apartment, a country house, safe, car or access to a personal computer. Now cellular telephone connected by the following method with a sensor that will automatically inform the owner about the condition of the protected property, wherever that may be. This is my article.
Kit electronic Christmas decorations from four independent devices developed and produced by the student of 9th class member directorship radio children’s Palace of creativity from the city of Saransk Alexei Pichushkin. On the urban exhibition of technical creativity in 2004 with these decorations won first place.