This automotive grade circuit was found in a 1991 Electronics Hobbyist. The transistors are general purpose types. P1 sets the monitoring voltage.
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...