but is there something prebuilt that I could just order online or something? I'd like to use a toggle switch for turning on my PC.

The homebrew substitute is mercifully cheap and easy to build, though — a momentary DPST toggle switch is partially gutted, with a length of nail substituted for one of its poles. The nail ...

It works in ‘toggle’ mode; that is, the first switch closure applies ... Both circuits provide an inexpensive way of deriving a latching function from a momentary switch and, just like a mechanical ...