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.

VCO With the 567 (CB4599E)
Using a PLL this circuit can generate signals of up to 500 kHz which is basically determined by the...
240 kHz amplifier using the LF356 (CB3994E)
The circuit presented with low drift is from the Motrorola LinearDatabook of 1990. The circuit...
NAB Preamplifier (CB846E)
This preamplifier is intended for the use with magnetic pick-ups. Power supply must have voltages...