[bartonfink]

You've made a stunning point. There's no analog way to make things happen more than once a day. The logic is clear and irrefutable. Well done.

[chongli]

You feed fish during the day when the light is on. If you feed them 3 times a day and the light is on for a 12 hour period, that’s once every 4 hours 3 times followed by 12 hours of rest. What analog timer can do that?

[bartonfink]

A 12 hour one with stops every four hours. Reset the timer when you fill the feeder in the morning.

If this was an interview question I would reject the job. You don't seem worth working with.

[chongli]

That’s not going to work if you’re going on a vacation for a week. You want to fill the feeder with a week’s worth of food at a time and have it feed every day according to the schedule. Control the power to the feeder with a smart plug and set the feeder’s internal timer to 4 hours.