would be either a "thc15a" or for the one above "Digital Trigger Cycle Timer Delay Switch Dual Mos" on whatever your standard sites are... ebay, amazon, aliexpress, ect
Its totally diy, just something to tinker with as practically speaking it gonna probably be more trouble and effort than its worth.
And speaking of that i did tinker a bit today.
First got those seeds which are now sprouts into some hydroton to try out, want to see if i can get then going without any bridge media “rockwool or coco” but i definitely see where the inherent challenges are. Due to that i have it running off that new timer/relay above, so just pulses on for 2 secs every 10min.
Speaking of that timer made a mistake with it in that i have a 1-999 sec or minute limitation with it where in the past i typically would run say a 10 sec watering every 2hrs once in bloom and bigger plants in coco, but cant do that with this timer unless i say do a 1 sec watering every 12 mins to be the same amount, but saying that i except i’ll be watering with more frequently anyways with hydroton, so we will see. Also currently dont have the lights on for it just cause i want to wait till they grow so more and shed their shells, as im concerned about things drying out too quickly right now if i throw the lights and circulation fan on.
Also tinkered with the mini light mover project/idea some more tonight, got it up and working roughly where it would just need some fine tuning wiring wise and a few other things, very basic but having it going now im having second thoughts on it souly for reasons of keeping things simple and having less things that can potentially go wrong, as im definitely adding some extra variables doing this “switch, motor, belt, gear mount, and wiring eventually breaking from consistently moving”
I’ll probably iron out the little details and get it setup so i can trial it for say a week or two, if it goes well i run with it but those warning flags are popping up in my head, which they were before but i just ignored them till i built a prototype.