This circuit was found in the February 1999 issue of Electronics Now magazine. The circuit consists of a timer that triggers a visual and audible starting device.
This circuit is from an old Elektor using components that are not currently common. The circuit is...
Pressing S1 the LED glows by a time interval depending on the capacitor. Time intervals in the...
Here we have an interesting circuit found in a 1981 publication that causes two LEDs to flash...