This 1960s Signalite circuit uses two SCRs to achieve full wave control. The trigger elements are neon lamps.
Several types of OSEPP sensor modules can be obtained from Mouser Electronics for Arduino...
Epcos TDK TB2569 Film Capacitor EPCOS / TDK offers through Mouser Electronics are line of film...
This circuit was obtained from a 2005 Linear Technology application manual. The circuit is...