This circuit is used to turn on the headlights when it gets dark. The circuit is from an Electronics Now magazine from October 1998. The power transistor must be equipped with a heatsink.
This circuit trips a relay when it stops receiving a signal. The transistor is germanium. We found...
This circuit, from a documentation from the 1970s, produces two sinusoidal signals given by C2 and...
Using a window comparator, this circuit trips over a certain range of input voltages. Formulas for...