
Ikea sold those timers. And also many diy shops. At least in sg.
Its mechanical. With switch on the side for always on vs timer mode
And those timers cycled 24hrs. Some is @15mins resolutions. And 30mins sets. Hear the click when u adjust the time.
Take care not to buy 12hrs version. Make sure u see 1-24 hrs around the clock.
Mechanical is better than digital. Trust me.
I purchased eheim knockoff autofeeder from dx.com.
But 4days without eating is ok. Even taro small turtle last 4days without eating when stressed.