[Giovanni Bernardo] has been experimenting with one of these, the internal frequency synthesiser on many PIC microcontrollers, and he’s produced a handy square wave generator for which he’s ...

When [Miroslav] sent in his ‘guerilla homebrew’ square wave generator, we were really impressed. With a relatively simple schematic that uses parts that could be salvaged from old radios ...

The sound capabilities of the computers improved over time. In 1981, Commodore introduced the VIC-20 computer, the first PC model to exceed a million units shipped. It offered three square wave ...