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.
This 1.5 A source for FM transmitters was originally intended for the transmitter described in...
This circuit provides an output voltage with approximately twice the input using two power...
This circuit was found in an 80's Electronic Design. It amplifies TTL fast signals for a coaxial...