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
CROCODILE-CLIP
When conducting home experiments with the batteries from the flashlight, the repair of toys and models with motors in adolescents is frequently necessary to connect conductors to the...
THE NEWCOMER BECOMES “SNIPER”
What is a shame to damage the car at the entrance to a private garage! Unfortunately, this happens with young drivers is not so rare, especially if the garage is to put it mildly, does...
