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
MEL FILE EACH
When processing a file soft and ductile materials cut quickly becomes clogged with sawdust. Cleaning the same tool is often more time consuming than the workflow itself. That it was a...
“CROSTIC”
So called my dad built them a simple house for rabbits. He made this Warren of wooden parts, and required metal mesh and steel latch made also by him. The roof was made of pieces of...
