Found in a 1949 Radio Electronics, this 4-tube circuit was fed directly from the mains with a half-wave rectifier.
The two power steps below are intended for use with the SAA1027 stepper motor control but can be...
August 2017 - Mouser Electronics is announcing the availability of TDK ICS-52000 microphones with...
What this interesting circuit does is to warn that a note written on a paper has been removed and...