This 555-based circuit was obtained from the 1995 Encyclopedia of Electronic Circuits volume 5. It triggers an SCR when the transistor is cut off.
Found in a Popular Electronics from the 90s, this circuit generates a signal that depends on the...
This circuit was obtained from old documentation, triggering when there is a power cut on the...
A passive mixer with few components is that of the circuit shown, found in a 1982 documentation. As readers...