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
…AND WITH A MAGNET
I have developed an activator of water consists of two glued together half-liter plastic bottles of kvass (their wall at the junction with a window size 170x5 mm, sometimes there are...
THE RING IS SAFER
Many of the TVs antenna socket is shallow and the plug often POPs out. Attach or stick on the entrance of the socket guide ring of sufficient height with an internal diameter slightly...
