**1. Topic** How to dynamically open the log of the Bluetooth kernel **2. Problem background** Product: Tina product such as scanning pen Hardware: V853 + XR829 Software: Tina linux4.9 The purpose is
The circuit diagram of this part is as shown in the figure. The signal generator PULSE generates a +4V square wave signal, and the driver IC1 converts it into a +18V square wave signal and outputs it
Part 1: Basic design principles for basic power supply and groundNoise on ground and power linesThe ideal ground resistance is zero, but in reality the ground always has a certain impedance. Especiall
The basic principles of anti-interference design are: suppress interference sources, cut off interference propagation paths, and improve the anti-interference performance of sensitive devices.
1. Supp