NelsonW posted:If you want an adjustable timer this will do what you are looking for. You will just have to supply the 12v dc.
DC 12V Delay relay shield NE555 Timer Switch Adjustable Module 0 to 10 Second
$2.58 free shipping
That seems exactly like the solution I'm looking for. They don't ship to Hawaii, but I found someone else that does thanks! I'll report back here on the results.