Programmable timer?

Hi, I’m new to home automation. I’m looking for something simple - a programmable timer that when triggered would just close the connection across non-powered two wires (causing something else to then trigger on). What are some good solutions that are easy to power, easy to program from a PC (is it mostly Linux or are there some easy ways to connect to it from Windows)?

thanks

Get a WiFi or ZWave relay and control it as needed from HA.