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
SPIKES? NO PROBLEM
Most comfortable furniture, "serious" joinery collect connecting parts on the thorns. Technical requirements for the quality of such nodes is usually very high. Run them by milling or...
The formation of the E5
After exit 2 "M-K" for the year 1991, we managed to get acquainted with information materials on the development of the self-similar class E5 in the international arena. Of course,...
