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Radio constructor "Start-7216" (music signaling device) since the middle of 1987 has been producing the Rivne plant named after A. 60th anniversary of October. It contains a case, a printed circuit board and parts from which you can assemble a music alarm device according to the attached instructions - a device that emits a signal resembling the singing of birds. The indicator is made on nine transistors KT315. The audio signal is generated by a ZP-3 piezo-ceramic radiator. The device control node allows you to either give a signal only when the button is pressed, the contacts of a switch are closed, or for about 5 seconds after briefly pressing the button. In the description of the Republic of Kazakhstan are given various options for the use of the detector. It can, for example, be used as a sensor for the presence of moisture, filling the tank with water, the degree of moisture of the fabric, etc. The power of the detector, carried out from the battery Krone, which is located inside the case. The supply voltage may lie in the range from 9 to 15 V. The current consumption does not exceed 80 mA. Dimensions design 125h94h35 mm, weight 200 g. Price 7 rubles.