Double base diode,also known as single crystal transistor (UJT)is a three terminal semiconductor device with only one PN junction.the circuit symbol,internal structure and equivalent circuit of double base diode. ...
On Oct-27-2018 in Memory
The use of multimeter to detect LED luminous platoon is mainly to check whether the LEDs are good ...
On Oct-27-2018 in Memory
As shown in Figure 5-18,a circuit for detecting a discoloration light emitting diode (LEDs),a multimeter is placed in the RX10k2 block,and the two pin is connected. ...
On Oct-27-2018 in Memory
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 ...
On Nov-01-2018 in Memory
Integrated passive devices are nothing new in our industry – they have been around for a long time and are well known. ...
On Nov-21-2018 in Memory
It refers to the maximum positive current allowed to pass through the diode during long-term operation,which is related to PN junction area and external heat dissipation conditions. ...
On Oct-30-2018 in Memory
use the multimeter to place the multimeter in the RX1~RX10kQ gear and measure the positive and reverse resistance of the bidirectional trigger diode ...
On Oct-27-2018 in Memory
The classification connector of the connector is also called a connector, which is usually composed of a plug ( also known as a male plug ) and a socket ( called a female plug ) ...
On Nov-02-2018 in Memory
Bidirectional thyristor(TRIAC)is a new type of semiconductor device developed on the basis of one-way thyristor ...
On Oct-29-2018 in Memory
Will be two pen ( regardless of the positive and negative ) are connected with the two ends of the resistor can be connected to measure the actual resistance value ( in order to improve the measurement accuracy ...
On Oct-31-2018 in Memory
peak height refers to the peak soldering PCB to eat tin height ( Figure 2-1 1 43 ) ...
On Oct-30-2018 in Memory
When detecting infrared light emitting diodes,there is a big difference between the pointer type multimeter and the digital multimeter ...
On Oct-27-2018 in Memory
Headset is also an electro-acoustic conversion device,which is similar in structure to an electric speaker,it is also composed of magnet,voice coil,vibrating diaphragm, etc,but the voice coil of the earphone is mostly fixed ...
On Nov-03-2018 in Memory
The main parameters of LED include the maximum working current Im and the maximum reverse voltage Um ...
On Oct-31-2018 in Memory
Judging the electrode to place the multimeter in RX1K2 block,and the red and black stylus rotation to connect a pair of electrodes,when a pair of pins is measured to be low resistance ...
On Oct-29-2018 in Memory
The materials used in Holzer devices include germanium,silicon,InSb,InAs,GaAs and so on ...
On Nov-03-2018 in Memory
the pin of the pin identifies the pin arrangement of the photosensitive transistor as shown in Figure 6-8,the foot near the pin or the longer one is the emitter E,and the far or shorter foot of the foot is the collector C ...
On Oct-27-2018 in Memory
This article describes the characteristics of the memory. ...
On Aug-03-2019 in Memory
The color LED dot matrix display is the same as monochrome.You can use short columns or rows of methods to detect,just a little cumbersome operation ...
On Oct-29-2018 in Memory
Because the positive resistance of the varactor diode is larger,the multimeter is placed in the RX 10k2 block,the red form is connected to the positive pole ...
On Oct-27-2018 in Memory
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 ...
On Nov-02-2018 in Memory
determine the order of the arrangement of the pins.The multimeter is placed in the R*1 thousand euro file ...
On Oct-27-2018 in Memory
LDO is a low dropout linear regulator, compared with the traditional linear regulator. Traditional linear regulators ...
On Nov-20-2018 in Memory