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 is the single-sourced version of the previous oscillator. Frequency can be changed by...
This powerful amplifier was part of commercial sound circuits from the 90s. The integrated circuit...
This circuit was found in a 1998 documentation. It consists of a timer with a 1-digit indicator for...