App that will turn off switch after a short period?

Andrew, could you share which Linear switch you used for your buzzer? Sorry, I’m new to this! Just want to get my door buzzer working with my SmartThings and there’s nothing to purchase off the shelf apparently. Here’s their Z-Wave product catalog for reference: http://www.linearcorp.com/pdf/literature/Z-Wave_Family_Brochure_Lit.pdf