This automotive circuit was found in the September 1992 issue of Radio Electronics magazine. The circuit directly drives a relay that must have a coil resistance greater than 65 ohms.
This circuit was found in Radio Electronics magazine from June 1963. The range is small and the...
This symmetric 30 mA x 15 V power supply was found in the Ferranti transistor manual from 1974....
This circuit was found in a 1967 Electronic Design. FETs are from the time, so modern equivalents can be...