The configuration is from the 1994 Linear Applications Handbook by National Semiconductor. The circuit is valid for the LH0033 and others in the same family.
This polarity test or indicator indicates the polarity of a power line by LEDs. The circuit is...
This is the circuit of a digital clock published in the January 1975 issue of Radio Electronics magazine....
Found in an Elektor from the 90s, this circuit can be powered directly by the power grid. The...