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
HUMMER H2
The first production models of this vehicle was delivered to army units in September 1985. The machine incorporates the most advanced technical and technological solutions of its time...
BREAD BOX
An old but wise folk saying goes: "Bread is the head of everything." However, storing it in advance is a hopeless task. It goes stale and dries out very quickly, or even gets moldy and...
