This TTL circuit uses LED indicators and must be powered by a voltage of 5 V. The capacitor determines the speed of the draw. We found it in documentation from the 90s.
What this circuit does is change the logic level of a signal thus serving as a different logic...
This electronic flash circuit was found in the March 1961 Radio Electronics magazine. The circuit...
On this website we show how to calculate the components of this circuit for other frequencies. The basic...