Logic testers are simple but very helpful devices ... When the tested point is above 2 volts, the D4 LED lights up signalling a logical “1” state. Another plus of the featured circuit is the fact that ...

Using a simple circuit ... output. A logic zero on the cathode node lights the LED, and a logic one turns it off. The cathode signal is the inverted form of the PWM output. In this example, the PWM is ...

It may be possible to reach new levels of miniaturization, speed, and data processing with optical quantum computers, which use light to carry ... a prototype for a logic circuit with two ...

Why it matters: For decades, scientists have dreamed of building computer chips that use light instead ... of performing simple logic operations entirely with light. Logic gates are the building ...

In fact, there aren’t any logic ... circuits found in a 1967 book Electronic Counting Circuits by J.B. Dance. The theory of these circuits rely on the different voltages required to light ...