diff --git a/SW/PC/Stopwatch/start_finish_stopwatch.py b/SW/PC/Stopwatch/start_finish_stopwatch.py
new file mode 100644
index 0000000..04874c3
--- /dev/null
+++ b/SW/PC/Stopwatch/start_finish_stopwatch.py
@@ -0,0 +1,110 @@
+import threading
+import time
+import usb.core
+import usb.util
+import requests
+import json
+import datetime
+
+DEBUG = False
+
+if DEBUG == True:
+    index = 2
+else:
+    index = 1
+activeCards = []    
+
+TIME = 600
+
+USB_IF      = 0 # Interface
+USB_TIMEOUT = 5 # Timeout in ms
+USB_VENDOR  = 0xffff # Vendor-ID:
+USB_PRODUCT = 0x0035 # Product-ID
+
+with open('people.json', 'r') as f:
+    db = json.load(f)
+
+try:
+    times = {}
+    with open('times.json', 'r') as f:
+        times_json = json.load(f)
+    for i in times_json:
+        times[i] = {}
+        times[i]['start'] = datetime.datetime.strptime(times_json[i]['start'],"%d/%m/%Y, %H:%M:%S")
+        try:
+            times[i]['end'] = datetime.datetime.strptime(times_json[i]['end'],"%d/%m/%Y, %H:%M:%S")
+            times[i]['duration'] = times[i]['end'] - times[i]['start']
+        except:
+            print(i, "Not finished yet")
+    print(times)
+except Exception as e: print(e)
+#except:
+#    times = {}
+#    times_json = {}
+
+class UsbCardReader():
+    def __init__(self, **kargs):
+        # Find the HID device by vendor/product ID
+        self.dev = usb.core.find(idVendor=USB_VENDOR, idProduct=USB_PRODUCT)
+        # Get and store the endpoint
+        self.endpoint = self.dev[0][(0,0)][0]
+        if self.dev.is_kernel_driver_active(USB_IF) is True:
+            self.dev.detach_kernel_driver(USB_IF)
+        # Claim the device
+        usb.util.claim_interface(self.dev, USB_IF)
+        self.receivedNumber = 0
+        
+        cardread=threading.Thread(target=self.read)
+        cardread.start()
+        
+    def read(self):
+        global activeCards, db, times, times_json
+        
+        print("Waiting for card")
+        receivedNumber = 0
+        
+        while True:
+            control = None
+            try:
+                control = self.dev.read(self.endpoint.bEndpointAddress, self.endpoint.wMaxPacketSize, USB_TIMEOUT)
+                if (control[2] != 40) & (control[2] != 0):
+                    receivedDigit = control[2] - 29
+                    if receivedDigit == 10:
+                        receivedDigit = 0
+                    receivedNumber = 10 * receivedNumber + receivedDigit
+                    
+                if (( control[0] == 0 )) & (( control[2] == 40 )) & (( not receivedNumber == 0 )):
+                    try:
+                        with open('people.json', 'r') as f:
+                            db = json.load(f)
+                        for i in db:
+                            if db[i] == receivedNumber:
+                                print("Runner:", i)
+                                print(db)
+                                runner_found = False
+                                for j in times:
+                                    if j == i:
+                                        runner_found = True
+                                        times[j]['end'] = datetime.datetime.now()
+                                        times[j]['duration'] = times[j]['end'] - times[j]['start']
+                                        times_json[j]['end'] = times[j]['end'].strftime("%d/%m/%Y, %H:%M:%S")
+                                        times_json[j]['duration'] = str(times[j]['duration'])
+                                if runner_found == False:
+                                    times[i] = {}
+                                    times[i]['start'] = datetime.datetime.now()
+                                    times_json[i] = {}
+                                    times_json[i]['start'] = times[i]['start'].strftime("%d/%m/%Y, %H:%M:%S")
+                                with open("times.json", 'w') as f:
+                                    f.write(json.dumps(times_json, indent = 4))
+                                print(times)
+                    except Exception as e: print(e)
+                    receivedNumber = 0
+                    
+            except KeyboardInterrupt:
+                exit()
+            except:
+                pass
+            
+            time.sleep(0.001)
+
+UsbCardReader()
\ No newline at end of file
diff --git a/SW/PC/Stopwatch/times.json b/SW/PC/Stopwatch/times.json
new file mode 100644
index 0000000..b95c622
--- /dev/null
+++ b/SW/PC/Stopwatch/times.json
@@ -0,0 +1,12 @@
+{
+    "1": {
+        "start": "25/02/2025, 18:06:16",
+        "end": "25/02/2025, 18:06:31",
+        "duration": "0:00:14.553644"
+    },
+    "2": {
+        "start": "25/02/2025, 18:15:08",
+        "end": "25/02/2025, 18:15:27",
+        "duration": "0:00:19.543765"
+    }
+}
\ No newline at end of file