LED digital tube also known as semiconductor digital tube ( Figure 1-1-5 ),it is a number of light-emitting diodes arranged in a fixed pattern and packaged together the most commonly used digital display one of the devices ...
The current amplification factor is the current magnification,which is used to indicate the amplifying power of the transistor.According to the working state of the triode ...
To measure the secondary coil of the output transformer,it can be measured directly with the two surface pen to check the output end of the city ...
The type and detection method of microphone is a device that converts sound energy into an audio Telecom number,also called a microphone ...
Application range of double wave soldering.Usually single wave soldering can not be competent for the welding of double-sided sticker printed circuit board ...