This is a full automatic brewing stand, can do any amount of potion without any intervention, so put ingredient turn it on, forget and claim your potion later. This design can make 1 to 4 ingredient potion. This is the fist functional version, I will update if I improve the design.

I make the display this long to test the limit. The original is 4 digits long, so it indefinitely stackable and I don't care to test it farther. There is a 15 ticks delay between each entry. My display use the signal length detection, you shouldn't have see something like that. It take 2 tick to display. But it take 1 to 10 tick to read the signal. It posses a reset function made the button a lever because it take 21 tick to put the system in position one, the stone button is fine up to 9 digits. So toggle the switch for 2 sec to clear the number and test it yourself. I have made a schematic for the original.

Redstone Lock

This is a 10 digit order sensitive password door easily customizable 10 000 possible combination. Which take me days to create. The redstone circuit use the one tick piston behavior, learned from SethBling Redstone Repeater Lock. If you you try to reproduce it, you should know the one tick piston behavior is lost if you put to much repeater between the piston and the button so do not use additional repeater, it will save you a big headache. Feel free to explore the rest of the House there is redstone almost everywhere and 3 hidden door. The Size of the combo lock schematic is 18*13*8.