In this 1990s circuit, found in a National Semiconductor manual, the output voltage is the square of the input voltage. The components are from the period.
This circuit only detects variations in light falling on the sensor. The circuit uses an LM380 as a...
This latched switch configuration was obtained from National Semiconductor documentation on the...
This electronic roulette circuit with 10 numbers was found in a Popular Electronics from the 80s....