With this circuit it is possible to vary the resistance by adjusting the mark/space reaction of the 555. The circuit was found in the November 1989 Radio Electronics magazine.
The circuit shown is a Pierce type oscillator and operates at the fundamental frequency of the...
This 100 kHz oscillator was found in a 1966 Motorola publication. The transistors are of types...
January 2017 - Texas Instruments' new TPS54200 integrated circuit for excitation of LEDs with a...