This circuit works on analog I/O ports and was suggested by an Electronic Design from the 90s. It can be used to work as a shield in projects with microcontrollers.
We found this two stage transistor amplifier circuit using RC coupling in a magazine published in...
Mouser Electronics has in stock Texas Instruments Buck controllers LM5145 to operate with voltage...
This circuit was found in Radio Electronics from the 90s. The CMOS integrated circuit is a PLL not...