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.

Laser Gun Receiver (CB16978E)
This circuit is the receiver for the CIR9984. It consists of a sequencer of 10 LEDs that is...
CMOS XTAL Oscillator (CB22400E)
We found this circuit in an old English documentation. The circuit can employ other gates and...
Door Alarm (CB6489E)
We found this circuit in a Popular Electronics of the 90s. The circuit can also be used as a seat...