lastTimeSinceLastSleep = time.time()
        self.sleepTime = 0.1
        while not self.stopped():
            loopTime = time.time() - lastTimeSinceLastSleep
            if loopTime < self.sleepTime:
                time.sleep(self.sleepTime-(time.time() - lastTimeSinceLastSleep)) # be kind to cpu  :)
                lastTimeSinceLastSleep = time.time()

should have been
        lastTimeSinceLastSleep = time.time()
        self.sleepTime = 0.1
        while not self.stopped():
            loopTime = time.time() - lastTimeSinceLastSleep
            if loopTime < self.sleepTime:
                time.sleep(self.sleepTime-(time.time() - lastTimeSinceLastSleep)) # be kind to cpu  :)
            lastTimeSinceLastSleep = time.time()