diff --git a/Arduino/__pycache__/__init__.cpython-37.pyc b/Arduino/__pycache__/__init__.cpython-37.pyc
index 54e3e92..6d84313 100644
Binary files a/Arduino/__pycache__/__init__.cpython-37.pyc and b/Arduino/__pycache__/__init__.cpython-37.pyc differ
diff --git a/Arduino/__pycache__/arduino.cpython-37.pyc b/Arduino/__pycache__/arduino.cpython-37.pyc
index 2c9276e..ce96862 100644
Binary files a/Arduino/__pycache__/arduino.cpython-37.pyc and b/Arduino/__pycache__/arduino.cpython-37.pyc differ
diff --git a/ArduinoTest.py b/ArduinoTest.py
index ff6d0a6..2436f73 100644
--- a/ArduinoTest.py
+++ b/ArduinoTest.py
@@ -5,17 +5,25 @@ from Arduino import Arduino
 print("Searching for Arduino...")
 board = Arduino()
 print("Arduino found.")
-board.pinMode(9, "Output")
+board.pinMode(15, "Output")
+board.pinMode(16, "Output")
+board.pinMode(17, "Output")
+board.digitalWrite(15, "LOW")
+board.digitalWrite(16, "LOW")
+board.digitalWrite(17, "LOW")
+
 
 i = 0
-while i <= 4:
+while i <= 1:
     print("running: ", i)
-    board.digitalWrite(9, "HIGH")
+    for var in [15,16,17]:
+        board.digitalWrite(var, "HIGH")
     time.sleep(0.5)
-    time.sleep(1)
-    board.digitalWrite(9, "LOW")
-    time.sleep(0.5)
-    time.sleep(1)
+    time.sleep(5)
+    for var in [15,16,17]:
+        board.digitalWrite(var, "LOW")
+        time.sleep(0.5)
+    time.sleep(2)
     i = i + 1
 
 board.close()
diff --git a/User_Interface.py b/User_Interface.py
new file mode 100644
index 0000000..79426a2
--- /dev/null
+++ b/User_Interface.py
@@ -0,0 +1,28 @@
+from tkinter import *
+
+
+class EmptyFrame:
+
+    def __init__(self, window):
+        frame = Frame(window, width=1000, height=600)
+        frame.pack()
+
+        one = Label(frame, text="One", bg="red")
+        one.pack(fill=X)
+        two = Label(frame, text="Two", bg="blue")
+        two.pack()
+
+
+class TopMenu:
+
+    def __init__(self, window):
+        menu = Menu(window)
+        window.config(menu=menu)
+
+        ModeSelector = Menu(menu)
+        menu.add_cascade(label="Mode", menu=ModeSelector)
+        ModeSelector.add_command(label="Full Manual", command=self.manual_mode(window))
+
+    def manual_mode(self, window):
+        print("Switching to manual mode")
+        window.delete(ALL)
diff --git a/__pycache__/cage_func.cpython-37.pyc b/__pycache__/cage_func.cpython-37.pyc
index 5bff8a8..f1aaeae 100644
Binary files a/__pycache__/cage_func.cpython-37.pyc and b/__pycache__/cage_func.cpython-37.pyc differ
diff --git a/__pycache__/globals.cpython-37.pyc b/__pycache__/globals.cpython-37.pyc
index 0005d07..18c683c 100644
Binary files a/__pycache__/globals.cpython-37.pyc and b/__pycache__/globals.cpython-37.pyc differ
diff --git a/__pycache__/main.cpython-37.pyc b/__pycache__/main.cpython-37.pyc
deleted file mode 100644
index 55b51fd..0000000
Binary files a/__pycache__/main.cpython-37.pyc and /dev/null differ
diff --git a/main.py b/main.py
index 9a85037..20169d0 100644
--- a/main.py
+++ b/main.py
@@ -1,9 +1,11 @@
 import numpy as np
 import globals as g
-import cage_func as func
-# from pyps2000b import PS2000B
+from tkinter import *
 from Arduino import Arduino
 
+import cage_func as func
+import User_Interface as ui
+
 # User Inputs/Configuration----------------------------------
 # Desired output:
 mag_vec1 = np.array([10, 10, 5])*1e-6
@@ -22,15 +24,8 @@ g.Z_PORT = "COM2"
 # Code starts here------------------------------------------
 g.MAX_AMPS = np.sqrt(g.MAX_WATTS / g.RESISTANCES)  # calculate maximum currents in each axis
 
-print("Connecting to PSUs...")
-func.set_devices()  # initiate communication, set handles
-print("Connecting to Arduino...")
-g.ARDUINO = Arduino()  # search for connected arduino and set handle
-print("Arduino found, configuring pins.")
-func.setup_arduino()
-print("Activating PSU outputs...")
-func.activate_all()  # activate remote control and outputs on PSUs
+mainWindow = Tk()
+MainFrame = ui.EmptyFrame(mainWindow)
+Menu = ui.TopMenu(mainWindow)
 
-func.set_field_simple(mag_vec1)
-
-func.deactivate_all()
+mainWindow.mainloop()
diff --git a/main_old.py b/main_old.py
new file mode 100644
index 0000000..9a85037
--- /dev/null
+++ b/main_old.py
@@ -0,0 +1,36 @@
+import numpy as np
+import globals as g
+import cage_func as func
+# from pyps2000b import PS2000B
+from Arduino import Arduino
+
+# User Inputs/Configuration----------------------------------
+# Desired output:
+mag_vec1 = np.array([10, 10, 5])*1e-6
+
+# Constants:
+g.COIL_CONST = np.array([38.6, 38.45, 37.9]) * 1e-9  # Coil constants [x,y,z] in T/A
+g.AMBIENT_FIELD = np.array([80]) * 1e-6  # ambient magnetic field in measurement area, to be cancelled out
+g.RESISTANCES = np.array([3.9, 1, 1])  # resistance of [x,y,z] circuits
+g.MAX_WATTS = np.array([8, 0, 0])  # max. allowed power for [x,y,z] circuits
+g.MAX_VOLTS = 16  # max. allowed voltage, limited to 16V by used diodes!
+
+# COM-Ports for power supply units:
+g.XY_PORT = "COM1"  # placeholders
+g.Z_PORT = "COM2"
+
+# Code starts here------------------------------------------
+g.MAX_AMPS = np.sqrt(g.MAX_WATTS / g.RESISTANCES)  # calculate maximum currents in each axis
+
+print("Connecting to PSUs...")
+func.set_devices()  # initiate communication, set handles
+print("Connecting to Arduino...")
+g.ARDUINO = Arduino()  # search for connected arduino and set handle
+print("Arduino found, configuring pins.")
+func.setup_arduino()
+print("Activating PSU outputs...")
+func.activate_all()  # activate remote control and outputs on PSUs
+
+func.set_field_simple(mag_vec1)
+
+func.deactivate_all()
diff --git a/pyps2000b/__pycache__/PS2000B.cpython-37.pyc b/pyps2000b/__pycache__/PS2000B.cpython-37.pyc
index ff2201f..77b78da 100644
Binary files a/pyps2000b/__pycache__/PS2000B.cpython-37.pyc and b/pyps2000b/__pycache__/PS2000B.cpython-37.pyc differ
diff --git a/pyps2000b/__pycache__/__init__.cpython-37.pyc b/pyps2000b/__pycache__/__init__.cpython-37.pyc
index a933847..4d806ea 100644
Binary files a/pyps2000b/__pycache__/__init__.cpython-37.pyc and b/pyps2000b/__pycache__/__init__.cpython-37.pyc differ
diff --git a/requirements.txt b/requirements.txt
index c998aa7..6409c7c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 numpy==1.19.3  # bug in numpy 1.19.4, 1.19.3 used as workaround
 pyserial~=3.5
 future~=0.18.2
-pandas~=1.1.5
\ No newline at end of file
+pandas
\ No newline at end of file