How nice to fall asleep to the rhythmic roar of the rain, as the happy jingle of the spring thaw! But should we depend on the vagaries of nature, when all you can hear at any time at home. It is enough to make a simple electronic device, based on a well-known multivibrator. Changing the position of the slider of the variable resistor R2 (see diagram), adjust the rhythm of the speakers B1 and B2. The device is powered from a single battery 3336L. Selecting the values of resistors and capacitors, achieve a pleasant timbre of the device. VOSKRESENSKY, Kuibyshev
Recommend to read
THE FIRST SOVIET LIMOUSINE
Luxury car ZIS-101. In the early 1930-ies in the Soviet Union there is an urgent need in an Executive car of a domestic production. The fact that pautinopodobnoj elite in the Soviet...
DRYER IN BATHROOM
However, it is applicable not only in the bathroom, but if necessary—in the kitchen or on the balcony. The essence of its design that uses no linen cords that quickly stretch and SAG and...
