Voltage Monitor MC34064 (CB14536E)

The component used in this circuit is uncommon today. The circuit is from Motorola's 1990 Linear Databook.

Head and Tails (CB4727E)
This is yet another simple LED driving game circuit that appears in several other versions on this site....
Photoelectric Sensor with Opposite Cells 741 (CB14645E)
We found this circuit in a manual of optoelectronics from Texas Instruments. In it photodiodes or...
Roman Numerals Display (CB16461E)
This interesting circuit is from a 1988 documentation. It is a matrix of diodes that converts...