OK, do you have a schematic to show us? That is generally a really good idea before buy parts. If you display such schematic the crew can give it a once over.
I talking a schematic of what your are going to do, which was a switching circuit using higher than rated voltage?Not without interfacing. There are ways to do it, such as the one I'm about to show for a relatively high frequency oscillator by way of example. The 555 controls a transistor, which in turn interfaces to the high voltage side.
BTW, a standard 555 can only handle 4.5VDC to 15VDC, while a CMOS 555 (totally different part) can usually handle 3.0VDC to 18VDC. The 19VDC is an internet myth, datasheets are your friend.
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by Jake Hertz