This sequential circuit of LEDs was found in a Popular Electronics from the 90s. The circuit can be programmed and an adaptation consists of using optical couplers to drive power loads.
This simple 741 circuit was found in the August 1993 Electronics Now magazine. The source must be...
Found in Popular Electronics, this sophisticated short-wave receiver requires a lot of skill from...
This sequencer allows the use of switches or sensors to generate the steps of a bipolar stepper...