Suggested by Maxim in documentation from the 90s, this circuit has its response curve given next to the diagram as well as the formulas for the component calculations.
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...