diff --git a/pyrelacs/ui/mainwindow.py b/pyrelacs/ui/mainwindow.py
index 3de6815..73c1d1c 100644
--- a/pyrelacs/ui/mainwindow.py
+++ b/pyrelacs/ui/mainwindow.py
@@ -1,5 +1,7 @@
+from pathlib import Path as path
+
 from PyQt6.QtGui import QAction, QIcon, QKeySequence
-from PyQt6.QtCore import Qt, QSize, QThreadPool
+from PyQt6.QtCore import Qt, QSize, QThreadPool, QTimer
 from PyQt6.QtWidgets import (
     QGridLayout,
     QPushButton,
@@ -13,12 +15,13 @@ from PyQt6.QtWidgets import (
 import uldaq
 import nixio as nix
 import pyqtgraph as pg
+import numpy as np
 
-from pathlib import Path as path
 
+from pyrelacs.dataio.daq_producer import DaqProducer
 from pyrelacs.worker import Worker
 from pyrelacs.repros.repros import Repro
-from pyrelacs.dataio.buffer import DataBuffer
+from pyrelacs.dataio.circbuffer import CircBuffer
 
 from pyrelacs.ui.about import AboutDialog
 from pyrelacs.ui.plots.calibration import CalibrationPlot
@@ -44,15 +47,14 @@ class PyRelacs(QMainWindow):
         filename = path.joinpath(path.cwd(), "data.nix")
         if filename.exists():
             self.nix_file = nix.File.open(str(filename), nix.FileMode.ReadOnly)
-        else:
-            self.nix_file = nix.File.open(str(filename), nix.FileMode.Overwrite)
+        filename = path.joinpath(path.cwd(), "calibration.nix")
+        self.nix_calibration = nix.File.open(str(filename), nix.FileMode.Overwrite)
 
         self.calibration_plot = CalibrationPlot(self.figure, self.nix_file)
 
         self.threadpool = QThreadPool()
         self.repros = Repro()
 
-        # self.buffers = DataBuffer(channels=1, samples=100_000)
         self.text = QPlainTextEdit()
         self.text.setReadOnly(True)
 
@@ -70,6 +72,11 @@ class PyRelacs(QMainWindow):
         widget.setLayout(layout)
         self.setCentralWidget(widget)
 
+        self.buffer = CircBuffer(size=500)
+        self.connect_dac()
+        self.daq_producer = DaqProducer(self.buffer, self.daq_device)
+        self.plot_daq()
+
     def create_actions(self):
         self._rlx_exitaction = QAction(QIcon(":/icons/exit.png"), "Exit", self)
         self._rlx_exitaction.setStatusTip("Close relacs")
@@ -101,6 +108,10 @@ class PyRelacs(QMainWindow):
         self._daq_calibaction.setStatusTip("Calibrate the attenuator device")
         # self._daq_calibaction.setShortcut(QKeySequence("Alt+d"))
         self._daq_calibaction.triggered.connect(self.calibration_plot.plot)
+
+        self._run_action = QAction(QIcon(":/icons/calibration.png"), "Run", self)
+        self._run_action.triggered.connect(self.run_daq)
+
         self.create_menu()
 
     def create_menu(self):
@@ -119,6 +130,7 @@ class PyRelacs(QMainWindow):
                 device_menu.addAction(self._daq_disconnectaction)
                 device_menu.addSeparator()
                 device_menu.addAction(self._daq_calibaction)
+                device_menu.addAction(self._run_action)
 
             if help_menu is not None:
                 help_menu.addSeparator()
@@ -139,6 +151,7 @@ class PyRelacs(QMainWindow):
         daq_toolbar.addAction(self._daq_connectaction)
         daq_toolbar.addAction(self._daq_disconnectaction)
         daq_toolbar.addAction(self._daq_calibaction)
+        daq_toolbar.addAction(self._run_action)
         self.addToolBar(Qt.ToolBarArea.TopToolBarArea, daq_toolbar)
 
         repro_toolbar = QToolBar("Repros")
@@ -150,7 +163,7 @@ class PyRelacs(QMainWindow):
                 lambda checked, n=rep, f=fn: self.run_repro(n, f)
             )
             repro_toolbar.addAction(repro_action)
-        self.addToolBar(Qt.ToolBarArea.TopToolBarArea, repro_toolbar)
+        self.addToolBar(Qt.ToolBarArea.BottomToolBarArea, repro_toolbar)
 
     def create_buttons(self):
         self.daq_connect_button = QPushButton("Connect Daq")
@@ -165,11 +178,50 @@ class PyRelacs(QMainWindow):
         self.plot_calibration_button.setCheckable(True)
         self.plot_calibration_button.clicked.connect(self.calibration_plot.plot)
 
+        self.daq_run_button = QPushButton("Run")
+        self.daq_run_button.setCheckable(True)
+        self.daq_run_button.clicked.connect(self.run_daq)
+
+    def plot_daq(self):
+        self.figure.setBackground("w")
+        self.daq_plot = self.figure.addPlot(row=0, col=0)
+        self.time = list(range(10))
+        pen = pg.mkPen("red")
+        self.data = list(range(10))
+        self.line = self.daq_plot.plot(self.time, self.data, pen=pen)
+
+        self.timer = QTimer()
+        self.timer.setInterval(50)
+        self.timer.timeout.connect(self.update_plot)
+        self.timer.start()
+        # self.update_plot()
+
+    def update_plot(self):
+        self.time = self.time[1:]
+        self.time.append(self.time[-1] + 1)
+        self.data = self.data[1:]
+        try:
+            item = self.buffer.get(self.buffer.write_index() - 1)
+        except IndexError:
+            item = 0
+
+        self.data.append(item)
+        self.line.setData(self.time, self.data)
+
+    def run_daq(self):
+        read_daq = Worker(self.daq_producer.read_analog_continously)
+        read_daq.signals.result.connect(self.print_output)
+        read_daq.signals.finished.connect(self.thread_complete)
+        read_daq.signals.progress.connect(self.progress_fn)
+        self.threadpool.start(read_daq)
+
     def connect_dac(self):
         devices = uldaq.get_daq_device_inventory(uldaq.InterfaceType.USB)
         try:
             self.daq_device = uldaq.DaqDevice(devices[0])
             log.debug(f"Found daq devices {len(devices)}, connecting to the first one")
+            self.daq_device.connect()
+            log.debug("connected")
         except IndexError:
             log.error("DAQ is not connected")
             log.error("Please connect a DAQ device to the system")
@@ -195,7 +247,7 @@ class PyRelacs(QMainWindow):
 
     def run_repro(self, n, fn):
         self.text.appendPlainText(f"started Repro {n}, {fn}")
-        worker = Worker(self.repros.run_repro, self.nix_file, n, fn)
+        worker = Worker(self.repros.run_repro, self.nix_calibration, n, fn)
         worker.signals.result.connect(self.print_output)
         worker.signals.finished.connect(self.thread_complete)
         worker.signals.progress.connect(self.progress_fn)