This circuit activates a garage door by the car headlights car or a lantern. The circuit is from a 1967 documentation, making use of period components.
This traditional crystal CMOS oscillator circuit was found in a 1990 Electronics Handbook. The...
This circuit uses only two common transistors and provides good audio power in a speaker. Readers who...
This circuit simulates a unijunction transistor trigger with two bipolar transistors. The circuit...