Found in the September 1992 issue of Radio Electronics magazine. This circuit generates pulses that are determined by C3. The circuit has output pulse intensity and timing adjusted by R6.
This circuit from a 1979 publication uses FETs which can be BF245 and integrated circuits, unlike...
When the temperature rises above the value adjusted by P1 the relay triggers on. The rated voltage for the...
This circuit for medium and short wave range was found in an American documentation from 1992. The...