This circuit drives symmetrical loads through a single transistor. The circuit is from a Radio Electronics from January 1993. The power depends on the MOSFET used.
We found this inverter in a Popular Electronics from the 1980s. The output is not perfectly...
Found in American documentation from the 90s, this circuit uses common FETs. It has a range drift...
The frequency of the sound produced in the speaker depends on the light that falls on the...