Optical sensor for PC (CB20548E)

This circuit was found in a PC documentation from 1996. It can be used as a shield with modern microcontrollers.

Switched Positive Regulator 723 (CB5462E)
The basis of this circuit is the 723 integrated circuit, not very common today. We obtained this...
Delayed Relay (CB1566E)
The circuit shown in the figure can be used to connect a loudspeaker to an amplifier only after...
10 MHz ADC (CB1585E)
Launched in early 1999, the new ADC12181 high-speed A / D converter is suitable for applications...