diff --git a/src/Timer.py b/src/Timer.py
new file mode 100644
index 0000000..6fc1d98
--- /dev/null
+++ b/src/Timer.py
@@ -0,0 +1,27 @@
+# Timer.py  30/09/2015  D.J.Whale
+#
+# Simple cooperative timer services for repeating events
+
+import time
+
+
+#----- TIMER ------------------------------------------------------------------
+
+class Timer():
+    def __init__(self, ratesec=1, offsetsec=0):
+        self.rate = ratesec
+        self.nexttick = time.time() + offsetsec
+
+
+    def check(self):
+        """Maintain the timer and see if it is time for the next tick"""
+        now = time.time()
+
+        if now >= self.nexttick:
+            # asynchronous tick, might drift, but won't stack up if late
+            self.nexttick = now + self.rate
+            return True
+
+        return False
+
+# END
\ No newline at end of file