Active with the output at the high level, this oscillator was found in November 1984 Radio Electronics magazine. The supply can be between 3 and 12 V and the output signal is rectangular.
For fans of sequential systems, here is another one found in a 1983 publication. Two CMOS...
This circuit, already explored in other applications on this site, allows using a high impedance...
In fact, it is a RF field indicator with an operational amplifier equivalent to the 741. This...