This circuit was found in the 1991 Electronics Experimenter's Handbook. It activates a relay when light shines on a sensor.
This echo or reverb chamber circuit uses a delay line well known at the time it was published...
This ouput push-pull stage using bipolar transistors was found in a publication of the year 1968....
September 2106 - Mouser Electronics already has in stock the new LDOs (Low Drop) from Infineon for...