The time of this timer depends on C1. The circuit was found in the July 1994 Electronics Now magazine. The supply voltage depends on the relay and can go up to 12 V.
This constant current circuit was found in the October 1993 Electronics Now magazine. The current can...
This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be...
This circuit was found in a 90’s Electronic Engineering. The integrated circuits are of the time...