This circuit that draws 1 out of 8 LEDs was found in an 80's American documentation. The circuit can also work with an astable using the 555 instead of the 4046 which is not a common component today.
This circuit is from a Popular Electronics from 1993. The magazine is no longer printed, but the...
Found in a Popular Electronics from the 90s, this circuit can be adapted to use LEDs. The power...
This sensitive medium wave (MW) radio pick up the local station without the need of an external...