diff --git a/acq4/drivers/ThorlabsDC4100/__init__.py b/acq4/drivers/ThorlabsDC4100/__init__.py
new file mode 100644
index 0000000000..f6687f3190
--- /dev/null
+++ b/acq4/drivers/ThorlabsDC4100/__init__.py
@@ -0,0 +1,5 @@
+# -*- coding: utf-8 -*-
+
+__author__ = """arielle leon"""
+__email__ = 'ariellel@alleninstitute.org'
+__version__ = '0.1.0'
diff --git a/acq4/drivers/ThorlabsDC4100/thorlabs_dc4100_led.py b/acq4/drivers/ThorlabsDC4100/thorlabs_dc4100_led.py
new file mode 100644
index 0000000000..e0d4cef215
--- /dev/null
+++ b/acq4/drivers/ThorlabsDC4100/thorlabs_dc4100_led.py
@@ -0,0 +1,88 @@
+import serial as s
+from serial import SerialException
+import logging
+import os
+
+
+COMMANDS = {
+    "set_brightness": "BP {} {}",
+    "get_brightness": "BP? {}",
+    "led_on": "O {} 1",
+    "led_off": "O {} 0",
+    "return_on_off": "O? {}",
+    "lock_led": "A {} {}",
+    "register_status": "R?",
+    "serial_number": "S?",  
+    "firmware": "V?",
+    "manufacturer": "H?",
+    "error_status": "E?"
+    }
+class ThorlabsDC4100:
+    def __init__(self,port,baudrate,timeout):
+        self.port = port
+        self.baudrate = baudrate
+        self.timeout = timeout
+        self.dev = None
+        self.escape = '\n\n'
+        self.read_buffer = []
+
+    def led_on(self, channel: int):
+        self._write_to_LED(COMMANDS["led_on"].format(channel))
+    
+    def led_off(self,channel: int):
+        self._write_to_LED(COMMANDS["led_off"].format(channel))
+    
+    def set_brightness(self,channel:int, brightness: float):
+        self._write_to_LED(COMMANDS["set_brightness"].format(channel,brightness))
+    
+    def get_brightness(self,channel: int):
+        self._write_to_LED(COMMANDS["get_brightness"].format(channel))
+        return self._read_from_LED()
+    
+    def check_if_on(self, channel: int):
+        self._write_to_LED(COMMANDS["return_on_off"].format(channel))
+        return self._read_from_LED()
+    
+    @property
+    def serial_number(self):
+        self._write_to_LED(COMMANDS["serial_number"])
+        return self._read_from_LED()
+
+    @property
+    def firmware(self):
+        self._write_to_LED(COMMANDS["firmware"])
+        return self._read_from_LED()
+
+    @property
+    def manufacturer(self):
+        self._write_to_LED(COMMANDS["manufacturer"])
+        return self._read_from_LED()
+     
+    def connect_device(self):
+        try:
+            self.dev = s.Serial(port=self.port,baudrate=self.baudrate,timeout=self.timeout)
+        except SerialException:
+            logging.error("Device connection could not be established")
+
+    def _write_to_LED(self, command: str):
+        self.dev.write(f"{command} {self.escape}".encode())
+    
+    def _read_from_LED(self):
+        while self.dev.is_open:
+            output = self.dev.read().decode()
+            if len(self.read_buffer) == 0 and output == '\r':
+                self.dev.flush()
+                continue
+            if output == "\n":
+                ret_value = "".join(self.read_buffer)
+                self.dev.flush()
+                self.read_buffer = []
+                return ret_value
+            else:
+                self.read_buffer.append(output)
+    
+def main():
+    led = ThorlabsDC4100(port='com12',baudrate=115200,timeout=0.5)
+
+if __name__ == "__main__":
+    main()