The infrared remote controller of ev3 is set by unscrewing the back cover and putting in three 7th batteries. Set the orange channel button in the middle of the remote controller to the same channel as the receiver of the remote controller. With the improvement of people's material and cultural living standards, various household appliances have entered thousands of households, most of which have their own remote controls. People often look for their corresponding remote control everywhere in order to control an electrical appliance, which brings a lot of inconvenience to people's lives.

Introduction of infrared remote controller

In order to solve this problem, a design scheme of multifunctional remote controller is proposed. The remote controller can have the remote control function of various electrical appliances through self-learning, which saves time and effort, thus saving people the trouble of facing multiple remote controllers at the same time.

The remote controller consists of an infrared receiving and transmitting circuit, a signal conditioning circuit, a central controller, a program and data memory, a keyboard and a state indicating circuit.

The remote controller has two states, learning state and control state. When the remote controller is in the learning state, every time the user presses the control key, the infrared receiving circuit begins to receive external infrared signals and convert them into electrical signals.

Then, after detection, shaping and amplification, the CPU samples at regular intervals, and stores the binary data of each sampling point in the designated storage unit in units of 8 bits for future control of the equipment.