Electronic components inventory_ Electronic equipment_ Procurement of electronic accessories

Inductors mainly play the role of filtering, oscillation, delay, notch, etc. in the circuit, as well as screening signals, filtering noise, stabilizing current and suppressing electromagnetic wave interference. The structure of inductor is similar to that of transformer, but there is only one winding, which is generally composed of skeleton, winding, shielding cover, packaging material, magnetic core or iron core, etc. If the inductor is in the state of no current passing, it will try to prevent the current from flowing through it when the circuit is connected; If the inductor is in a state of current flow, it will try to maintain the current when the circuit is disconnected. The inductor is composed of coils surrounded by magnetic materials. When the current passes through the inductor, it will create a magnetic field, which does not like to be changed. Therefore, an inductor is an element that will prevent the current flowing through it from changing; If the current flowing through the inductor is constant, the inductor will feel very comfortable and will not create additional force on the charged particles flowing through it. In this case, the inductor behaves like a normal wire. However, if we try to block the current flowing through the inductor, the inductor will create a force to maintain the current flowing through the inductor. If an inductor is connected end to end, and the circuit has no other resistance, in theory, the current can flow forever without decay. However, unless we use superconductors, any wire itself has resistance, which will cause the final current to decay to zero. The greater the resistance in the circuit, the faster the current decay; However, the larger the inductance of the inductor, the slower the current will decay. Once the current decays to zero, the inductor will try to maintain the current status of zero; This is because the inductor always tries to stop the current flowing through it from changing. Therefore, when we connect the inductor to a circuit, at first, the inductor will generate a force, which will prevent the current from increasing. 

What device is EEPROM?

EEPROM is a live erasable programmable read-only memory. It is a memory chip with no data loss after power failure. EEPROM can erase existing information and reprogram it on a computer or on a dedicated device. Usually used for Plug and Play. EEPROM (charged erasable programmable read-only memory) is a user-modifiable read-only memory (ROM), which can be erased and reprogrammed (rewritten) by higher than normal voltage. Unlike EPROM chips, EEPROM can be modified without having to be removed from the computer. In an EEPROM, the life of the EEPROM is an important design consideration because the computer can be programmed repeatedly when it is in use. EEPROM is a special form of flash memory that is typically used to erase and reprogram voltage from a personal computer The writing process of EEPROM takes advantage of the tunnel effect that electrons with less energy than the energy barrier can cross the barrier to the other side. Quantum mechanics assumes that electrons fluctuate when the physical size is equal to the free path of the electron, which means that the object is small enough. As far as the P n junction is concerned, when the impurity concentration of P and N reaches a certain level and the space charge is very small, the electrons will migrate due to the tunnel effect guide band. The range in which the energy of an electron is at an allowable level is called a band, the lower band is called a valence band, and the higher band is called a conduction band. When an electron reaches a higher conduction band, it can move freely between atoms, which is the current. Due to the inconvenience of EPROM operation, the BIOS ROM chips on the motherboard are mostly EEPROM (Electrical Erasable Programmable ROM). EEPROM erase does not need to use other devices, it uses electronic signals to modify its contents, and uses Byte as the smallest unit of modification, so it can write without washing out all the data, completely breaking away from the constraints of EPROM Eraser and the programmer.