This receiver for infrared remote control was found in the Philips Databook of 1990, The circuit operates with 5 V and is intended for receiving data.
This shield circuit uses a common CMOS port. The voltage depends on the interfaced logic. The...
This circuit was published in Popular Electronics from the 90's. The components are common, as...
This circuit with SCR was found in an old documentation. The SCR can be the TIC106, and the...