This circuit was found in the February 1993 issue of Radio Electronics magazine. Some components depend on the crystal frequency and can be changed.
We found this circuit in 2005 Linear Technology documentation. The integrated circuit is LT1787...
This circuit counts from 1 to 10 or 0 to 9 using as indicators common LEDs. The circuit can be...
We found this circuit in a Popular Electronics of the 90s. The circuit still uses light bulbs, but...