This oscillator was found in the July 1993 Electronics Now magazine. The coil is wound with 28-wire in a 0.5 cm shape.
This circuit functions as a thermostat triggering a relay when the boil control temperature...
This circuit has its application suggested in an alarm system. The circuit is from an old RCA...
Found in a 1967 manual, this circuit uses transistors from the era to generate a linear ramp...