This shunt voltage regulator was found in an Electronic Design from the 90's. The power transistor must be in accordance with the load current and must be equipped with a heat sink.
This circuit was found in an American documentation from the 60's. The transistors are from the...
This oscillator is indicated for the adjustment of FI of FM radios, having its frequency...
This configuration triggers an external circuit or simply an LED for time given by R1 and C1 (T =...