Found in American documentation from the 1990s, this circuit uses coils with multiple outlets to get the best reception, the diode is a general-purpose crystal diode.
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....