The keyboard (such as Pelco KBD-300, or Samsung SPC-1010 keyboard) handle sends commands to the main program through the RS485 serial port. The main program parses and acts on another PTZ device. The
The attached figure is a wireless transmitting circuit. The specific function of the inductor L1 inside it has not been very clear, so I bring it out for everyone to discuss and improve together.
When you ask a technical question, what kind of answer can you get? It depends on the way you ask the question.You must understand that engineers only prefer difficult tasks or good questions that can