LCD screen: LCD screen is based on liquid crystal material and filled between two parallel plates. The arrangement of molecules in the liquid crystal material is changed by voltage, so as to achieve the purpose of shading and light transmission to display images with different shades. As long as a three-color filter layer is added between the two plates, color images can be displayed. LCD screen has low power consumption, so it is favored by engineers and is suitable for electronic equipment using batteries.
Inverter: The inverter converts direct current energy (battery, storage battery) into alternating current (generally 220V, 50Hz sine wave). It consists of inverter bridge, control logic and filter circuit. Widely used in air conditioners, home theaters, electric grinding wheels, power tools, sewing machines, DVDs, VCDs, computers, televisions, washing machines, range hoods, refrigerators, video recorders, massagers, fans, lighting and so on. In foreign countries, because of the high popularity of cars, when going out to work or travel, you can use inverters to connect batteries to drive electrical appliances and various tools to work. The output power specifications of vehicle-mounted inverter through cigarette lighter are 20W, 40W, 80W, 120W to 150W. The inverter power supply with high power should be connected to the battery through the connecting wire. By connecting household appliances to the output of the power converter, various electrical appliances can be used in automobiles. Electrical appliances that can be used include: mobile phone, notebook computer, digital video camera, camera, lighting lamp, electric shaver, CD player, game machine, PDA, power tools, car refrigerator and various electrical appliances for travel, camping and medical emergency.
Driving board: The driving circuit is the key circuit of liquid crystal imaging, which is mainly used to drive the LCD panel to work. Broken will lead to black screen or flower screen.
Keyboard: function keys: through MCU RB0 RB 1 RB2 RB3 pin and MCU RB4? RB5？ The RB6 pin combination matrix scans the keyboard in turn, and the scanning state is passed through the single chip microcomputer. When RB2 1, camera gun RB6 is detected by the key. When RB3 is 1, check the key of auxiliary switch lamp RB6 of RB4. After detection, the control relay outputs the detection information from pins RD0, RD 1, RD2, RD3, RD4, RD5, RD6 and RD7.
Remote control: A remote control is a device used to remotely control a machine. Modern remote controller is mainly composed of integrated circuit panel, which is used to generate different messages (definition of message in communication: it is composed of a group of interrelated meaningful symbols, which can express a complete message. ) button. The bus door remote controller uses the latest technology to encode and decode, and controls the door pump solenoid valve in a flashing way to achieve the purpose of automatic door opening and closing. Used to remotely open and close the doors of buses (buses, CMB), avoiding the trouble that drivers need to get on the bus to open the door every time. The main component of the remote control transmitter is an infrared light emitting diode. It is actually a special kind of light emitting diode. Because its internal material is different from ordinary light-emitting diodes, when a certain voltage is applied across it, it emits infrared rays instead of visible light.
Speaker: It is a modern electro-acoustic component, whose function is to convert electrical signals into sound.