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.
Standing wave ratio or SWR is an important measure of whether all power from a transmitter is being...
This circuit or practical idea comes from a time when cheap solar cells were not available (1992). What is...
This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of...