This decorative circuit was found in the July 1994 issue of Electronics Now magazine. It makes LEDs blink in a face-shaped allegory. The frequencies are given by the capacitors in the oscillators.
This circuit was found in the 1991 Electronics Experimenter's Handbook. It activates a relay when...
In the figure we have the adapter circuit for connecting a headphone to the output of a stereo...
This circuit causes one LED to light up if the voltage falls below the value set in R3 and the...