This circuit was found in the July 1998 issue of Electronis Now magazine. It is a traditional gated version of the 4049 and has its frequency controlled by R2.
T The modern equivalents of the transistors used in this 1980s setup are BC548 or even BC547 and...
This circuit is indicated for the control of resistive loads. When S1 is opened, the triac turns on...
This circuit is from a 1957 Japanese magazine, showing the use of OC19 in a high voltage inverter. The...