Abstract: A wireless communication terminal controlling an input detecting operation by using an interrupt handler is disclosed. The wireless communication terminal includes: a general purpose input output (GPIO) port for receiving an input, changing a state of the GPIO port according to the input and transmitting a signal when the input is received; a first timer for providing a first predetermined interval; a second timer for providing a second predetermined interval; a controlling unit for activating the interrupt handler to receive the signal from the GPIO port and generate an interrupt by receiving the signal for activating the first timer and the second timer, un-activating the interrupt handler when the interrupt handler generates the interrupt, performing the input detecting operation based on the first predetermined interval, re-activating the interrupt handler based on the second predetermined interval for stopping to perform the input detecting operation.

Abstract: A combined electric fan and radiation heater, selectively used as an electric fan in summer and as an electric radiation heater in winter, is disclosed. The combined fan and heater of this invention consists of a fan motor set in a motor case, a parabolic rear safety net, a blade unit, and a parabolic front safety net in the same manner as a conventional electric fan. The combined fan and heater is also provided with a parabolic reflector and a heat radiating body. The parabolic reflector is designed to be detachably attached to the front end surface of the motor case using a nut while replacing the rear safety net. The heat radiating body is externally wound with a heating coil and is designed to be detachably held on a seat of the parabolic reflector prior to being attached to the front end surface of the motor case using a plurality of locking screws while replacing the blade unit, with the heating coil being operated in conjunction with an existing electric circuit.