This switched power supply was found in a 70s documentation. The basic components are from that time. The circuit operates at 200 kHz and has a ripple below 200 mV.
This circuit is suggested by National Semiconductor and with two operational amplifiers an LM833...
ST Microelectronics has, in its line of low voltage drop linear regulators, the KD1084xx (fixed) and...
In this circuit a 12 V lamp or LED blinks with the music signal applied to the input. R depends on...