The maximum current of this circuit is 200mA, and the ripple is only 50 mV. The circuit is suggested by Texas Instruments in its linear applications manual.
This circuit triggers an alarm when the mains power is cut off. The circuit was found in the July...
This acutely tuned circuit was found in American documentation from the 1960s. The transistors are germanium...
This small AM transmitter was found in American documentation from the 1980s. Transistor support...