Why is a timer different then a thermostat in a fridge,oven,ac,heating, hot plate, crock pot. Both dont have thier own minds yet we are only concerned with only a timer, even though both are going off and on at different intervals.
Good question, but I think the appliances cycling on and off is considered part of the running of the appliance, which started before Shabbos, but when a timer activates, it’s viewed as the appliance being turned on on Shabbos.
Why are people mixng up zilzu shabbos with chillul shabbos d’orysa?
Who? Where?