Patent ID: 7020502

Claim:
A transmitter for a remote control system comprising: a battery that supplies an operating voltage; an key operation means that receives an instruction from an operator; a memory that stores a rolling code corresponding to a number of times the key operation means is operated; a writing means that increments the rolling code stored in the memory every time the key operation means is operated and writes the incremented rolling code into the memory; a transmission section that transmits a signal including the rolling code stored in the memory to a receiver of the remote control system; a dummy load circuit that consumes an amount of power corresponding to an amount of power required for a process of writing the rolling code into the memory by the writing means; and a writing propriety determination means that drives the dummy load circuit and determines propriety of writing of the rolling code by the writing means based on a degree of decrease in battery voltage caused by driving the dummy load circuit prior to the writing of the rolling code by the writing means.