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.

Resistive Touch Screen FT Series
June 2017 - The new touch screens with resistive sensors of the FK Series from NKK Switches can...
MKP1847H AC Filter Capacitors
June 2017 - Mouser Electronics has in stock the new AC Metallized Polypropylene Film Capacitors...
Tunnel Diode Multivibrator (CB1339E)
The frequency of this circuit, that makes use of a tunnel diode as an active element, depends on...