Digital timer does minute times, has 8 programmes and is perfect for feed scheduling.
Just use a button dripper with 2 or 4 way split. With or without a spike to distribute the water evenly.
If your water is just running out the bottom, either you are using a very drainy organic medium which will require emending or it will leach out all the nutes...
Or you are using hydroton, which then requires multi feeds during the day..