This CMOS circuit for LED displays is from a Radio Electronics magazine from February 1989. The circuit has an enable pulse for storing the value shown on the display.
This circuit is from a 90s Popular Electronics. The circuit employs a ZN461E that is not a common...
This full-wave precision circuit was obtained from a 90's Radio Electronics. The circuit must be...
This traditional doubler configuration with the 555 can be found in other articles on the author’s site....