Automatic cat litter box.

Hi @SamSam,

thank you for the kind words, I will upload a per item photo-story on the greek forum for v2, I am waiting for some parts from alliexpres, the vibration requires a better way to secure the scooping part, it moves out of place. :)

I will also upload all the code for the magic3 on github. This a list of the parts I used(some you can find cheaper on other stores, those link are from my past orders page, so I have used them without problems, but I can see some prices went a bit up):
controler(magic3):
https://www.aliexpress.com/item/1005005373233740.html
servo for the ball( the 12V 270 version, it works very smooth at 5volts, and is way stronger at 5v than any other servo I have tried, and way more efficient, 6W max for the 12V model at 5volts to move 4Kg of sand, 14W for the 9V model at 5Volts):
https://www.aliexpress.com/item/1005004934282252.html
servo for the lock:
https://www.aliexpress.com/item/1005005180487492.html
main power module:
https://www.aliexpress.com/item/1005006361300312.html
controller/scale supply protection board
https://www.aliexpress.com/item/1005006191578119.html
load sensors( 10kg)
https://www.aliexpress.com/item/32763839569.html
rods for the scooping part (ABS 3x250mm 25pc)
https://www.aliexpress.com/item/1005002115579949.html
latch for ball lock/scooping part
https://www.aliexpress.com/item/1005002679373408.html
ToF sensor(VL53L0X)
https://www.aliexpress.com/item/1005006160743016.html

for the Bama flower pot, ~18 euros is the standard price here in Greece, I can see that on amazon.fr it costs 26 and not available. I am not sure if any of the Greek shops ships to France.

on the resin-cardboard I agree that it is useful for diy, it was an experiment so this time I got better and can do things like curves with no special tools or mold/template, paper is very nice to work with :)

I will make some comments on the procedure, unfortunately all 5 new ones are past the resin stage now, but I do have some photos. But over all it is super simple, the cardboard it self is important on how well it "drinks" the resin, I found out that cardboards that are somewhat soft, are not very resin friendly*. The cardboard on the bama pot is excellent, if you peel out the printed layer, it will "drink" all the resin you place on it, perfect to get a good idea on how strong resing/cardboard can be. Very strong. I am actually a bit lucky, as the first cardboard I used was the one from the bama pot, so I got very good results, had I first used some others I later tried, I maybe would have dismissed the idea as not useful.

*For example, I made two toilets using the cardboard from the neakasa m1, same thickness as the cardoard I used from some solar panels I got, but the neakasa m1 was not "drinking " the resin as well, I think some cardboards may have some anti moisture treatment on the paper, I think you can figure them out by how soft they are.

The resin I am using is this one, it is used in construction applications, but I think any low viscosity/high penetration epoxy resin will do. For reference, 1Lt costs 22 euros, and each toilet(base/scooping part/drawer) needs up to 1.5 lt to be very strong, or as low as 0.5lt to be good enough.

On how to apply the resin on the cardboard, I do it in two stages, first I use a painting brush to paint the resin on both surfaces of the cardboard, wait for 6-7 hours, and then depending on how well the cardboard drank the resin ( the second part is not needed for some thin cardboards like the one on the bama pot), I use the brush doing what one should never do when painting something, I repeatedly run it on the top edge, so that the resin falls though the holes. You can do it the other way around the first time, to get an idea on how well yous cardboard works with the resin. Run the brush on the edge several times to force resin through the holes, and wait an hour, the resin will eventually find its way down and out and will make the outer surface dark/wet. The time from no resin to ready is over 4 days, 12 hours in it will be non stick and easy to work with, bend it a bit, make final adjustments etc, maybe apply some more, but it needs at least 4 days to reach full hardness.

the paint is FLAME BLUE spray, 400ml – FB-834 (LIGHT GREY NEUTRAL), and is almost identical to the Ice (white) Bama sfera flower pot.