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.
In this circuit the 555 is configured as an adjustable timer for long intervals. The capacitor C1 can be...
We found this traditional configuration in an Italian 1960 documentation. The transistor can be...
May 2017 - This proximity and touch controller from Azoteq can control 12 mutual channels and can...