what is a double base diode (single junction transistor)?
On 2018-10-26 17:09:25 in Memory
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. ...
how to detect the LED emission tube?
On 2018-10-26 16:31:21 in Memory
The use of multimeter to detect LED luminous platoon is mainly to check whether the LEDs are good ...
Comparative analysis of LDO linear regulator and DC/DC device
On 2018-11-20 10:33:07 in Memory
LDO is a low dropout linear regulator, compared with the traditional linear regulator. Traditional linear regulators ...
Wave soldering technology is a mature electronic assembly process
On 2018-10-30 11:33:30 in Memory
the process is loading plate,coating flux,preheating,wave soldering,hot air knife treatment,cooling and unloading plate ...
how to detect a two-way trigger diode?
On 2018-10-26 17:02:25 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 ...
How to detect the BTG thyristor?
On 2018-10-29 15:08:36 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 ...
How to choose the high-speed CF memory card necessary for the photography industry?
On 2019-08-03 10:43:05 in Memory
This article describes the characteristics of the memory card. ...
The main parameters of LED
On 2018-10-31 11:11:54 in Memory
The main parameters of LED include the maximum working current Im and the maximum reverse voltage Um ...
The characteristics of Holzer element
On 2018-11-03 15:08:21 in Memory
The materials used in Holzer devices include germanium,silicon,InSb,InAs,GaAs and so on ...
the structure,type and detection method of the loudspeaker
On 2018-11-03 15:12:34 in Memory
one The structure of the loudspeaker.The loudspeaker,also known as the horn,is an electro-acoustic conversion device that converts the analog voice telephone number into a sound wave ...
How do you choose isolation architectures, circuits, and components in power inverter applications?
On 2018-11-21 10:57:27 in Memory
Both motor and power control inverter designers have the same problem of isolating control and user interface circuits from dangerous power line voltages. ...
Common parameters
On 2018-10-30 11:49:42 in Memory
peak height refers to the peak soldering PCB to eat tin height ( Figure 2-1 1 43 ) ...
Headphones and piezoceramic buzzers
On 2018-11-03 15:17:06 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 ...
Is Facebook's cloud storage a welfare or a trap?
On 2019-08-05 10:46:43 in Memory
This article describes the characteristics of the memory. ...
how to detect a photosensitive transistor?
On 2018-10-27 11:13:49 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 ...
how to detect the discoloration LEDs?
On 2018-10-26 16:40:18 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. ...
What is a bidirectional thyristor?
On 2018-10-29 14:25:17 in Memory
Bidirectional thyristor(TRIAC)is a new type of semiconductor device developed on the basis of one-way thyristor ...
Diode rectifier filter circuit，Diode half wave rectifier circuit
On 2018-09-12 13:00:54 in Memory
Power plant to send 50 Hz AC, after long-distance transmission, to the user is still 50 Hz AC, it is usually sent to industrial users 380 V three-phase AC, to ordinary civil users 220V single-phase AC. ...
Brief analysis of the principle and function of transmission
On 2018-11-20 10:38:35 in Memory
The transmission is used to change the speed and torque of the engine. It can fix or change the transmission ratio of the output shaft and the input shaft in different stages. It is also called the transmission ...
Structure and characteristics
On 2018-11-01 16:47:41 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 ...
How do you measure infrared light emitting diodes?
On 2018-10-26 16:48:19 in Memory
When detecting infrared light emitting diodes,there is a big difference between the pointer type multimeter and the digital multimeter ...
Using integrated passive components in the micro-module SIP
On 2018-11-21 11:20:07 in Memory
Integrated passive devices are nothing new in our industry – they have been around for a long time and are well known. ...