Using the 723 integrated circuit, this power supply has the voltage determined by R2 and R3, which can be changed. The circuit is from a Radio Electronics magazine from July 1971.
Indicated for vinyl media recovery, this circuit is from the 80's, having been found in an...
This levitation circuit keeps a small globe floating in space under the action of a magnetic...
This frequency-corrected 1 kHz circuit has a nearly perfect rectangular signal. The circuit is...