We found this circuit with duty cycle adjustment in the May 1988 Radio Electronics magazine. The source must be symmetrical, and the frequency given by R3 and C1.
This circuit was found in the April 1983 issue of Radio Electronics magazine. Its purpose is to...
Evidently, this is a project that still needs some improvements. For example, the ignition can be...
This very low voltage regulator for 3 V input (2 batteries) was obtained in a documentation from...