Seektronics

  A   transistor   is a semiconductor device that switches on and off and amplifies electronic signals. It has at least three terminals that connect it to electronic circuits. The transistor was invented in the early 1950s and quickly replaced vacuum tubes in electronic devices. These devices are now an important part of almost all electronic devices, such as the central processing unit   (CPU)   of computers. A CPU transistor is usually part of an integrated circuit, although it can also be purchased separately.   A central processing unit (CPU). Terminals in CPU transistors have specific names, depending on the type of transistor. The terminals of a simple bipolar transistor are called the collector, emitter, and base. The current or voltage applied to the base affects the flow of current from the collector to the emitter.     The voltage at the base of the transistor can be used to turn on and off the current flowing from the collector to the emitter. This type of transistor is a s

  1. UART   UART is called Universal Asynchronous Receiver-Transmitter, which is usually used for a communication connection between chips and external devices. When we say serial port in embedded, it usually means UART port. Embedded systems often use the UART port to connect to the COM port of the host PC (or to connect to the USB port of the host after converting the UART to USB) for debugging, so that the printf function in the embedded system can be redirected to print to the display of the host.   The data transmission format of UART is as follows.   During the transmission process, the UART sender sends out the byte data bit by bit in serial, and the receiver receives the data bit by bit and then reorganizes it into byte data. the UART transmission rate is measured by Baud Rate (Baud Rate).   2. I2C   I2C is a simple, bi-directional two-wire synchronous serial bus developed by Philips, which requires only two bus lines: a serial data line SDA and a serial clock line SCL, and sup