A circuit includes a first native or depletion n-channel Metal Oxide Semiconductor transistor and a second native or depletion n-channel MOS transistor. Logic is configured to execute GUI generation code and GUI user interaction handling code, and control a display device. An ejecting mechanism is coupled to the guiding member to give the connection object a moving force towards the removing direction in response to the movement towards the fitting direction of the connection object connected to the connection element. A configurable timer is started. The second friction plate rocks around a columnar protrusion as the rocking center.