Minecraft Regeneration potion help

Probably the most compact design I know is like this:

W-W-B
W-R-T

W = Redstone Wire B = Any solid block R = Repeater T = Redstone Torch

Taken from minecraftwiki.

You can do this using a scoreboard objective and Data Tags.

To check for worn items, you will need to look at {Inventory:[{Slot:Xb,...}]}, where X is the appropriate slot, as follows: Helmet: 103, Chestplate: 102, Leggings: 101, Boots: 100. Replace the ellipsis with the items data tag, such as id:minecraft_diamond_boots or tag:{display:{Name:"Bob"}} (More info can be found at the wiki article on item structure).

Here's an example with jumping boots called "Rocket Boots", for both 1.9 and 1.8:

1.9

Set up a repeat/chain command block line and run

/scoreboard players tag @a[tag=jumpBoots] remove jumpBoots
/scoreboard players tag @a[tag=!jumpBoots] add jumpBoots {Inventory:[{Slot:100b,tag:{display:{Name:"Rocket Boots"}}}]}
/effect @a[tag=jumpBoots] minecraft:jump_boost 1 2 true

This will add the "jumpBoots" tag to everyone wearing "Rocket Boots". Every player with this tag gets a jump boost effect for 1 second, with magnitude 2 and without swirley particle effects.

1.8

For 1.8, you need to set up a scoreboard objective first:

/scoreboard objective add jumpBoots

You only have to do this once. Now put a some command blocks on a setblock/fill clock, and execute, in this order:

/scoreboard players set @a jumpBoots 0
/scoreboard players set @a jumpBoots 1 {Inventory:[{Slot:100b,tag:{display:{Name:"Rocket Boots"}}}]}
/effect @a[score_jumpBoots_min=1] minecraft:jump_boost 1 2 true

Since tags don't exist in 1.8, we use a scoreboard that is set to 0 or 1 depending on whether or not a player is wearing the boots.