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
A SNOWMOBILE FOR EVERYONE
The propulsion system of this snowmobile consists of a rubber-fabric track made from a 300 mm wide conveyor belt and joined into a ring using a hinged loop. On its outer surface, cleats...
THE LAMP IN THE CASE
When installing lighting outdoors, in the garage, in the cellar of the desired closed fixtures. Such a lamp you can do yourself in minutes. This will require any holder and glass jar 850...
