Delayed Turn-On Switch With SCR (ART313E)

Figure 1 – Delayed Turn-on switch

LM290xAQ Operational Amplifiers (COM011E)
It can be obtained from Mouser Electronics the new LM290xAQ operational amplifiers from Diodes...
XHP50 Xlamp LEDs
May 2017 - Cree's new XLamp high-power LEDs can be ordered from Mouser Electronics for maximum...
Intrusion Detector 555 (CB17250E)
We found this circuit that warns when the gate of a house is opened in an old documentation,...