At first glance, the school gym is the same as thousands of others. But this is only at first glance… Observant person will note here something unusual. On boards and panels, attached to walls, installed button. Hanging above the light Board. The gym class begins with warm-up, and then the class is divided into groups. Students in one group with a small running start then jump at a time, hand hitting the button. While the scoreboard lights up every time the figure is estimation.
Again and again the boys exercise, and finally, the scoreboard reveals long-awaited five.
As you may have guessed, the role of the coach runs the machine. It is made in the school № 1 of the Chervonograd Lviv region.
Eight of the buttons are set vertically on the side of the basketball shield at a distance of 10 cm from each other. The upper — at an altitude of 305 eat from the floor. The keypad may optionally be raised and lowered by loosening the mounting bolts.
Control panel with five buttons attached to the wall. The height of his pick up on the growth of children. The student steps up to the panel and presses the button to which si is free to reach (thus, the machine program is set in accordance with the growth of the young athlete). Now, after a short run, you have to press the highest button on the panel. Immediately after, the scoreboard flashes the score.
By pressing the “reset” button automatic return to the starting position.
How does it work? With buttons S3 and S7 is located on the control panel, turn on the corresponding relay K5—K9 (see diagram). For example, the student pressed the button S4. Relay KB. Contacts KB,5 it cambiocorsa, and K6.1—K6.4 prepares the circuit of relay supply estimates K1—K4.
Now, when the student is jumping, press the button located on the side of the basketball shield, for example, S10, relay K2 will turn on the D2 lamp, illuminating the figure 4 — a rating.
The button S2 is pressed the machine is de-energized.
In the scheme used the following parts: relay RS-13 (passport RS4.523.017), bell buttons, light bulbs at 3.75 V. the Transformer T1 is wound on the core of the plates Ш29, the thickness of the package ?5 mm. the Winding of I contains 2640 turns of wire PEL of 0.16, winding II — 240 turns of PEL of 0.25, winding III — 48 turns of PEL of 0.8.
V. NEILL vul, Ukraine, Chervonograd, Lviv region
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