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
THROUGH THE BUCKET
When you need to refurbish the victim or oblasti wheel drive car, the question always arises: how to paint it so not to dirty the tire? Good and handy protective mask in this case can...
JEEP GLADIATOR
The first all-wheel drive model of the firm Willis was created in 1941 in accordance with the supply contract for the US army light army vehicles of class "quarter-ton". The SUV, called...
