This circuit was found in a Philips documentation from 1967. The circuit uses components from the time that have current equivalents such as BC548 for transistors.
Found in American documentation from 1969, this circuit uses logic inverters to obtain sequences of 4...
This simple experimental circuit using only transistor produces a tone given by C1 and C2. Tone is...
According to the logic level applied to the input of this circuit, X1 is activated and X2 turns...