1. 74HC245: This IC's main functions are signal power amplification and bidirectional 3-state data buffering, providing high load capacity for chips with lower output capabilities.
2. 74HC138: As an 8-bit binary-to-decimal decoder, it converts digital signals into corresponding decimal outputs.
3. 4953: This IC is typically used as a row driver, i.e., a power transistor, to drive row signals in LED screens.
4. 74HC595: Primarily used as a column driver and LED driver chip, it includes an 8-bit shift latch and is commonly used in indoor LED unit boards.
5. Taiwan Macroblock MBI5024 and MBI5026, and Toshiba TB62726: These ICs are LED driver chips containing a 16-bit shift latch, mainly used in outdoor LED modules. Their functions are similar to the 74HC595, but the TB62726 has an output current adjustment function and will not have a high level on the parallel output port, only a high-impedance state and a low-level state.
6. LED Display Screen: This is a flat panel display composed of small LED module panels, capable of displaying various information such as text, images, video, and recorded signals. LED, short for light-emitting diode, is a device that uses semiconductor light-emitting diodes to control the display method. It is made of compounds of gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), and indium (In). When electrons and holes recombine, they emit visible light, thus they can be used to make light-emitting diodes, used as indicator lights in circuits and instruments, or to form text or number displays. Different materials of diodes emit different colors of light, such as gallium arsenide phosphide emitting red light, gallium phosphide emitting green light, silicon carbide emitting yellow light, and indium gallium nitride emitting blue light.
