This circuit was obtained in a Hands-On Electronics from the 90's. The circuit turns on one LED at the end of the timer, erasing the other. The timing can be increased by increasing C1.
This circuit from a 1970s General Electric publication applies to motors of the series winding type....
This microphone preamplifier with output intensity adjustment is suitable for modulating...
This circuit is from a project published in the March 1996 Electronics Now magazine. The author used...