diff --git a/test/akku.lua b/.test/akku.lua
similarity index 89%
rename from test/akku.lua
rename to .test/akku.lua
index 8664c87..f560eb7 100644
--- a/test/akku.lua
+++ b/.test/akku.lua
@@ -8,7 +8,8 @@ local PWR_PERF = 10
 local PWR_CAPA = 300
 
 local Cable = techage.ElectricCable
-local secondary_power = techage.power2.secondary_power
+local secondary_power = techage.power.secondary_power
+local power_switched = techage.power.power_switched
 
 local function in_range(val, min, max)
 	if val < min then return min end
@@ -24,7 +25,7 @@ local function formspec(pos, mem)
 		"image[0,0.5;1,2;"..techage.power.formspec_power_bar(PWR_CAPA, mem.capa or 0).."]"..
 		"label[0.2,2.5;Load]"..
 		"button[1.1,1;1.8,1;update;Update]"..
-		"image[4,0.5;1,2;"..techage.power2.formspec_load_bar(-(mem.delivered or 0), PWR_PERF).."]"..
+		"image[4,0.5;1,2;"..techage.power.formspec_load_bar(-(mem.delivered or 0), PWR_PERF).."]"..
 		"label[4.2,2.5;Flow]"
 end
 
@@ -50,6 +51,7 @@ local function node_timer(pos, elapsed)
 		--print("delivered = "..mem.delivered)
 		return true
 	end
+	mem.delivered = 0
 	return false
 end
 
@@ -74,7 +76,7 @@ local function after_place_node(pos, placer)
 	mem.generating = true
 	mem.capa = 0
 	minetest.get_node_timer(pos):start(CYCLE_TIME)
-	techage.power2.power_switched(pos)
+	techage.power.power_switched(pos)
 	on_rightclick(pos)
 end
 
@@ -99,6 +101,6 @@ minetest.register_node("techage:akku", {
 	on_timer = node_timer,
 })
 
-techage.power2.register_node({"techage:akku"}, {
+techage.power.register_node({"techage:akku"}, {
 	power_network  = Cable,
 })
diff --git a/test/sink.lua b/.test/sink.lua
similarity index 74%
rename from test/sink.lua
rename to .test/sink.lua
index 6b098d9..2022a4d 100644
--- a/test/sink.lua
+++ b/.test/sink.lua
@@ -3,11 +3,11 @@ local S = function(pos) if pos then return minetest.pos_to_string(pos) end end
 local P = minetest.string_to_pos
 local M = minetest.get_meta
 
-local PWR_NEEDED = 2
-local CYCLE_TIME = 2
+local PWR_NEEDED = 5
+local CYCLE_TIME = 4
 
 local Cable = techage.ElectricCable
-local consume_power = techage.power2.consume_power
+local consume_power = techage.power.consume_power
 
 local function swap_node(pos, name)
 	local node = minetest.get_node(pos)
@@ -19,20 +19,31 @@ local function swap_node(pos, name)
 end
 
 	
-local function node_timer(pos, elapsed)
-	--print("node_timer sink "..S(pos))
+local function on_power(pos)
 	local mem = tubelib2.get_mem(pos)
-	if mem.running then
+	--print("sink on_power", mem.running)
+	mem.timer_running = (mem.timer_running or 1) - 1
+	if mem.running and mem.timer_running >= 0 then
 		local got = consume_power(pos, PWR_NEEDED)
 		if got < PWR_NEEDED then
 			swap_node(pos, "techage:sink")
 		else
 			swap_node(pos, "techage:sink_on")
+			mem.power_available = true
 		end
-		return true
 	end
-	swap_node(pos, "techage:sink")
-	return false
+end
+
+local function node_timer(pos, elapsed)
+	--print("node_timer sink "..S(pos))
+	local mem = tubelib2.get_mem(pos)
+	if mem.running and not mem.power_available then
+		--print("sink not triggered")
+		swap_node(pos, "techage:sink")
+	end
+	mem.power_available = false
+	mem.timer_running = CYCLE_TIME/2 + 1
+	return true
 end
 
 
@@ -82,6 +93,7 @@ minetest.register_node("techage:sink_on", {
 	sounds = default.node_sound_wood_defaults(),
 })
 
-techage.power2.register_node({"techage:sink", "techage:sink_on"}, {
+techage.power.register_node({"techage:sink", "techage:sink_on"}, {
 	power_network  = Cable,
+	on_power = on_power,
 })
diff --git a/test/source.lua b/.test/source.lua
similarity index 88%
rename from test/source.lua
rename to .test/source.lua
index 1aff7df..1570065 100644
--- a/test/source.lua
+++ b/.test/source.lua
@@ -7,13 +7,13 @@ local CYCLE_TIME = 2
 local PWR_CAPA = 15
 
 local Cable = techage.ElectricCable
-local provide_power = techage.power2.provide_power
+local provide_power = techage.power.provide_power
 
 local function node_timer(pos, elapsed)
 	--print("node_timer source "..S(pos))
 	local mem = tubelib2.get_mem(pos)
 	if mem.generating then
-		local delivered = provide_power(pos, PWR_CAPA)
+		local provided = provide_power(pos, PWR_CAPA)
 		return true
 	end
 	return false
@@ -29,7 +29,7 @@ local function on_rightclick(pos, node, clicker)
 		minetest.get_node_timer(pos):stop()
 		mem.generating = false
 	end
-	techage.power2.power_switched(pos)
+	techage.power.power_switched(pos)
 end
 
 
@@ -51,6 +51,6 @@ minetest.register_node("techage:source", {
 	on_timer = node_timer,
 })
 
-techage.power2.register_node({"techage:source"}, {
+techage.power.register_node({"techage:source"}, {
 	power_network  = Cable,
 })
diff --git a/test/switch.lua b/.test/switch.lua
similarity index 84%
rename from test/switch.lua
rename to .test/switch.lua
index 6a3cd27..3de19aa 100644
--- a/test/switch.lua
+++ b/.test/switch.lua
@@ -4,20 +4,18 @@ local P = minetest.string_to_pos
 local M = minetest.get_meta
 
 local Cable = techage.ElectricCable
-local on_network_change = techage.power2.on_network_change
-local power_switched = techage.power2.power_switched
+local power_switched = techage.power.power_switched
 	
 local function on_rightclick(pos, node, clicker)
 	local mem = tubelib2.get_mem(pos)
 	
 	mem.interrupted_dirs = mem.interrupted_dirs or {}
 	mem.interrupted = not mem.interrupted
-	print("switch", mem.interrupted)
+	--print("switch", mem.interrupted)
 	if mem.interrupted then 
 		mem.interrupted_dirs = {true, true, true, true, true, true}
 		for dir,_ in pairs(mem.connections) do
 			mem.interrupted_dirs[dir] = false
-			--on_network_change(pos)
 			power_switched(pos)
 			mem.interrupted_dirs[dir] = true
 		end
@@ -31,7 +29,7 @@ end
 minetest.register_node("techage:switch", {
 	description = "Switch",
 	tiles = {'techage_appl_switch_inv.png'},
-	on_timer = node_timer,
+	--on_timer = node_timer,
 	on_rightclick = on_rightclick,
 
 	paramtype = "light",