This circuit was obtained in an old Elektor and can be adapted to use white power LEDs. The transistor must be equipped with a heat sink. The circuit has a battery charger.
Found in a 90s English documentation, this circuit consists of an RF detector for testing in RF...
May 2016 - It can be obtained from Mouser Electronics the new digital sensor HDC1080 precision...
This 5-band function generator circuit was found in the April 1994 Electronics Now magazine. The...