This variable frequency oscillator for radio transmission covers the range from 1.6 MHz to 20 MHz, depending only on the coil used. The circuit is very stable and can be used in amateur equipment.
This triac temperature control circuit was found in an 80s power semiconductor documentation. The circuit...
Figure bellow shows how n flip-flops can be associated to perform a shift register. Data is...
This circuit is from 1986 documentation, being adaptable in radios of that time. The circuit uses the...