PCB Technical - Photovoltaic PCB board and elevator copy board clone

The main principle of photovoltaic power generation is the photoelectric effect of semiconductors. When a photon shines on a metal, its energy can be absorbed by an electron in the metal. The energy absorbed by the electron is large enough to overcome the internal gravity of the metal to do work, escape from the metal surface and become a photoelectron. Silicon atoms have 4 outer electrons. If pure silicon is doped with 5 outer electrons such as phosphorus atoms, it becomes an N-type semiconductor; if pure silicon is doped with 3 outer electrons, such as Boron atoms form a P-type semiconductor. When the P-type and N-type are combined, the contact surface will form a potential difference and become a solar cell. When sunlight hits the PN junction, the current flows from the P-type side to the N-type side, forming a current. Usually, the collected light energy is converted into electric energy and stored, and the electric energy is released when it is needed. Typical applications are solar street lights, solar power generation,

Circuit board copy board (PCB copy board) can copy out the PCB data of the circuit board 1:1, and then back out the schematic diagram according to the BOM (bill of materials). According to the schematic diagram, we can analyze the advantages and disadvantages of similar products in design, so as to improve us PCB product design.

Elevator circuit board copy board clone

The elevator controller is composed of hardware and software. The hardware includes the controller, the controller backplane, the card reader antenna, the power supply, the card writer, and the IC card ID card. The software includes the lower computer operation control software and the upper computer write card authorization software. The intelligent elevator floor personnel control system is designed for the control personnel in the elevator car to enter and exit specific floors. Control card holders to enter and exit specific permitted floors to prevent random access to each floor and ensure safety; with segmented addition, deletion, query card number and floor settings; operation mode: single-level card holders can swipe their cards directly. No more Button; after swiping the card, multi-layer card users must press the authority button recorded in the card to arrive; a password keyboard can be selected to enable the password to be entered when the card is forgotten to take the elevator; with time zone control: the system can be opened for a certain period of time. Controlled for a certain period of time to make the elevator run automatically according to regulations; the system and the elevator itself are connected by passive contacts, and the two are completely isolated, which will not have any impact on the original performance of the elevator; PCB products come with self-checking device When the system fails or is destroyed, it can send out a signal, and it will automatically be separated from the original system and restore the original state of the elevator without affecting the use of the elevator; PCB input interface with fire-fighting signal, when the passive dry contact fire-fighting switch signal is activated, IC card elevator system does not work, the elevator is restored to the original state; using low-power CMOS microcomputer, personnel and stored data can be stored for 10 years without loss when power is off; including advanced reception card function; offline or online state system will automatically Record the relevant information of each successful card swipe to use the elevator, including the user's card number, use time, elevator code used, floor reached, and transaction information for statistics, printing, archiving, and query.