In the figure we have the way to implement a logic gate or (OR) with an LM393. The circuit must be powered by a symmetrical source and other operational ones can be used.
This traditional circuit with the 555 was found in a 1984 documentation. In this oscillator, the...
Found in Motorola documentation from the 90's, this circuit has a high input impedance. The power...
Found in old documentation this circuit uses the NOR ports of 4001. The circuit has the frequency and...