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 for Laser Diode power was found in a 2005 Linear Technology manual. In the diagram...
Found in a 90s Maxim's documentation, this circuit applies to almost any comparator. | Clique na...
This electronic Morse Key for telegraph message transmission was found in an American 1980s...