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
MOTORCYCLE OF THE WATERWAYS
In the mid-80s, television screens in many countries widely advertised small, fast, exceptionally maneuverable motorized vessels under the general name "water motorcycle": "jet ski",...
“SKYSCRAPER” CHAMPION
All conscious life Vladimir Menshikov associated with the sky. In his childhood he built flying model airplanes. Hence the choice of a profession. And as a matter of course, flying...
