Q: Southbound on Route 378 at the south end of Bethlehem’s Hill-to-Hill Bridge, the traffic patterns at afternoon rush have turned up an inefficiency in the traffic-signal function. Southbound traffic ...

Unijunction transistors (UJTs) were common circuit elements several decades ago. A simple ramp generator could be built from a single UJT and a few other components (Fig. 1). 1. In a simple UJT-based ...