diff --git a/mods/ITEMS/REDSTONE/mcl_observers/init.lua b/mods/ITEMS/REDSTONE/mcl_observers/init.lua
index 596792dda5..b23299f2c0 100644
--- a/mods/ITEMS/REDSTONE/mcl_observers/init.lua
+++ b/mods/ITEMS/REDSTONE/mcl_observers/init.lua
@@ -9,43 +9,48 @@ local get_rules_flat = function(node)
 	return rules
 end
 
-minetest.register_node("mcl_observers:observer", {
-	description = "Observer",
+mesecon.register_node("mcl_observers:observer",
+{
 	is_ground_content = false,
 	sounds = mcl_sounds.node_sound_stone_defaults(),
 	paramtype2 = "facedir",
 	-- TODO: Add to craft guide and creative inventory when it's useful
 	groups = {pickaxey=1, not_in_craft_guide=1, not_in_creative_inventory=1 },
+	on_rotate = false,
+	_mcl_blast_resistance = 17.5,
+	_mcl_hardness = 3.5,
+},
+{
+	description = "Observer",
 	tiles = {
 		"mcl_observers_observer_top.png", "default_furnace_bottom.png",
 		"mcl_observers_observer_side.png", "mcl_observers_observer_side.png",
 		"mcl_observers_observer_front.png", "mcl_observers_observer_back.png",
 	},
-	after_dig_node = function(pos, oldnode, oldmetadata, digger)
-		local meta = minetest.get_meta(pos)
-		local meta2 = meta
-		meta:from_table(oldmetadata)
-		local inv = meta:get_inventory()
-		for i=1, inv:get_size("main") do
-			local stack = inv:get_stack("main", i)
-			if not stack:is_empty() then
-				local p = {x=pos.x+math.random(0, 10)/10-0.5, y=pos.y, z=pos.z+math.random(0, 10)/10-0.5}
-				minetest.add_item(p, stack)
-			end
-		end
-		meta:from_table(meta2:to_table())
-	end,
-	_mcl_blast_resistance = 17.5,
-	_mcl_hardness = 3.5,
 	-- TODO: Mesecons handling
-	mesecons = {effector = {
+	mesecons = { receptor = {
+		state = mesecon.state.off,
 		rules = get_rules_flat,
 	}},
-	on_rotate = false,
-})
+},
+{
+	_doc_items_create_entry = false,
+	tiles = {
+		"mcl_observers_observer_top.png", "default_furnace_bottom.png",
+		"mcl_observers_observer_side.png", "mcl_observers_observer_side.png",
+		"mcl_observers_observer_front.png", "mcl_observers_observer_back_lit.png",
+	},
+	-- TODO: Mesecons handling
+	mesecons = { receptor = {
+		state = mesecon.state.on,
+		rules = get_rules_flat,
+	}},
+}
+)
+
 
 minetest.register_craft({
-	output = "mcl_observers:observer",
+	output = "mcl_observers:observer_off",
 	recipe = {
 		{ "mcl_core:cobble", "mcl_core:cobble", "mcl_core:cobble" },
 		{ "mcl_nether:quartz", "mesecons:redstone", "mesecons:redstone" },
@@ -53,7 +58,7 @@ minetest.register_craft({
 	}
 })
 minetest.register_craft({
-	output = "mcl_observers:observer",
+	output = "mcl_observers:observer_off",
 	recipe = {
 		{ "mcl_core:cobble", "mcl_core:cobble", "mcl_core:cobble" },
 		{ "mesecons:redstone", "mesecons:redstone", "mcl_nether:quartz" },
diff --git a/mods/MISC/mcl_wip/init.lua b/mods/MISC/mcl_wip/init.lua
index 845d1c86e1..98a2b13405 100644
--- a/mods/MISC/mcl_wip/init.lua
+++ b/mods/MISC/mcl_wip/init.lua
@@ -8,7 +8,8 @@ local wip_items = {
 	"mcl_fishing:fishing_rod",
 	"mcl_maps:empty_map",
 	"gemalde:node_1",
-	"mcl_observers:observer",
+	"mcl_observers:observer_off",
+	"mcl_observers:observer_on",
 	"mcl_chests:trapped_chest",
 	"mobs_mc:totem",
 	"mcl_paintings:painting",