That’s the reason for the vast versions of SPICE available now decades after the original was released, not all of which are as open or free as we might like. Qucs is a GPL circuit simulator.

But the circuit in the figure shows an infrared close-object alert system built aroun Many robotic applications require a sensor to detect close or very close obstacles. Typically, reflective-type ...

Researchers believe this is critical to our ability to see small objects moving against a backdrop of complex motion. The cells in the retina are wired up like an electrical circuit. Vision begins ...