This circuit operates with an AM radio tuned to or near 900 kHz if there is a station at this location. The coil consists of 60 + 40 turns 28 on a ferrite rod.
We found this circuit in the July 1988 Radio Electronics magazine. The frequencies are given by...
This oscillator for various frequencies was obtained from a 1980s telecom documentation. The...
You can adjust the frequency produced by a ring oscillator with three inverters inserting a...