Obtained in a 1968 Electronics World, this circuit uses transistors from the time and the sensor is a common LDR. The component values are for scales from 0.01 to 100 foot-candle.
This circuit was adapted from a 1995 Electronics Now magazine. He shows how to implement a type of...
This sophisticated logic probe for 5 to 12 V circuits (CMOS and TTL) was found in a 1980s...
This passive mixer has a configuration that does not always lead to good results from the use of...