The circuit shown is based on National Semiconductor buffers and was found in the 1994 Linear Applications Handbook. The font must be symmetrical.
With this circuit, from an old operational datasheet, it is possible to measure the CMRR,...
Found in a Popular Electronics from the 90s, this circuit can be adapted to use LEDs. The power...
The circuits shown in the figure, that of an infrared video signal transmitter and receiver, were...