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Learn about the error of reset circuit and the principle of reset circuit in the circuit diagram of Wang Small board

The reset circuit of the stm32f411 chip in the Wang Gong's small board is as follows:In fact, this circuit is wrong, after the actual measurement, stm32f411 chip runtime reset pin is high, and in this circuit diagram, in fact, the stm32f411 chip runtime reset pin level to see the low level, according to this

[Original tutorial of black gold] [serialization] [iboard Electronic School] [〇] Part 2 circuit diagram and Printed Circuit Board

I,What is circuit schematic The circuit schematic diagram is a schematic diagram that uses graphical symbols in a certain order to describe the basic connection relationship between the circuit and the device, regardless of the actual location or physical form,

[Daily circuit diagram] 2, infrared remote control circuit principle design and analysis of "Turn + interpretation"

Landlord said: This is mainly about an infrared remote control circuit principle and design, part four is the focus, with the circuit diagram to illustrate the specific process-receive, count, meet the conditions trigger control circuit!From elecfans:http://www.elecfans.com/article/88/131/198/2015/20151215394306.htmlFi

How to distinguish the digital circuit from the analog circuit in the same schematic diagram

The digital circuit is the switching circuit; the device operating state: is not on or off, the general signal level just high and low. The height is "1", the low level is "0", the operating state is the pulse power. The analog circuit is the amplification circuit, the slightest change should be calculated, consider

Design the PLC ladder diagram based on the circuit diagram of the relay

PLC uses a ladder chart language that is extremely similar to the circuit diagram of the relay. If PLC is used to transform the relay control system, it is a shortcut to design a ladder chart based on the relay circuit diagram. This is because the original relay control system has been used and tested for a long time a

[Daily circuit diagram] 6, see a stepper motor drive circuit "turn"

beats, but the rotation torque of the single four Beats is small. The step angle of the eight-beat working way is half of the Tanshi and the double four Beats, therefore, the eight-beat working method can maintain the high rotational torque and improve the control precision. The power-on timing and waveform of the Tanshi, double four-beat and eight-shot modes are shown in 2.a, B, and C respectively:Figure 2: Step Motor operation Timing waveform diagramThree, stepper motor drive

[Daily circuit diagram] 7, the design of a PCB process and details • Summary--to the layman's classmates or just into the students a macro view of the General circuit board design process of the article

method is not easy to design the skeleton, there is a just to see (in fact, there is no egg) of the Hollow method (looks hollow): Place---polygon fill knockout, in the area where you want to open a polygon, modify its properties for board cutout.6. Preview of Final effectPS: go home tomorrow, work overtime today to write good ~ If you feel good, point a praise, let more people benefit ~ @beautifulzzzz 2016-02-02 continue~E-mail:[email protected][Daily circ

Concept of Circuit common sense (8)-principle diagram of MOS and simple CMOS Logic Gate Circuit

, 3 pipe cutoff, C the output is low. ③,AInput low level,BWhen the input is high, it is similar to ②, and the output is low. ④, A , B The input is normal, 1 , 2 Deadline, 3 , 4 Pipe conduction, C The end voltage is the same as that of the ground, and the output is low. Note: Remove the small circle at the output end of the above-mentioned "Non" Door, "or" Non "Door logical symbol to form the logical symbol of" with "Door," or "door. The

hdu1878-Euler circuit (no direction diagram exists in the Euler circuit, entry question)

Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=1878" Concept "Euler circuit: If there is such a path in Figure g, so that it passes through each edge of the G once, it is said that the path is a Eulerian path . If the path is a circle, it is called a Euler (Euler) loop .The topic is an no-show diagram:the necessary and sufficient conditions for the existence of the Euler circuit in the non-graphAn un

Working Principle and circuit diagram of switching power supply

formulas,That is, UO = Um × t1/TIn the formula, um is the maximum voltage value of the rectangular pulse, T is the Rectangular Pulse cycle, and T1 is the rectangular pulse width.As can be seen from the above formula, when um and t remain unchanged, the average DC voltage uo will be proportional to the pulse width T1. In this way, as long as we try to narrow the pulse width with the increase of the output voltage of the regulated power supply, we can achieve the goal of stable voltage.Ii. princi

Circuit diagram of wideband ALC amplifier with TL026 and other components

differential op-amp circuit providing high input impedancesWith ease of gain adjustment through the variation of a single resistor.Voltage definitionsTo understand the behavior of a fully-differential amplifier, it's important to understand the voltage definitions used T o Describe the amplifier.Figure 3 shows a block diagram used to represent a fully-differential amplifier and its input and output voltage

Online Design System for Ship Circuit Diagram Based on java web and. net activex plug-in and visio, activexvisio

Online Design System for Ship Circuit Diagram Based on java web and. net activex plug-in and visio, activexvisio 1. Main objectives of the system: 1. Online circuit diagram design and circuit equipment selection; 2. online processing of Engineering Computing involved in

Typical circuit diagram and analysis __asm1117-3.3 of ASM1117-3.3V voltage regulator chip

Today, the circuit diagram of SD card module, found that the operating voltage of SD card is 3.3V, so need to use voltage regulator chip to convert 5V power supply to 3.3V voltage, so a little bit about the voltage regulator chip data We choose the voltage regulator chip is asm1117-3.3, encapsulated as SOT-223 But in the drawing of the schematic diagram of the

Power supply circuit diagram

supplies and motor drives. In the following introduction, NMOS is also used.A parasitic diode exists between the drain pole and the source pole. This is called a body diode, which is very important in driving inductive loads (such as motors. By the way, the diode only exists in a single MOS tube and is usually unavailable in an integrated circuit chip. It is the structure diagram of the mos tube, which is

Electric Mosquito pattern circuit diagram Principle

Electric Mosquito pattern is a new type of small household appliance for mosquito control. The working principle of this product is to use the electronic line to boost the generation of power. At present, such products on the market use dry batteries for power supply, and also use batteries for power supply. The principle is that the output power is very small after the pressure is increased to kill mosquitoes through discharge, which does not affect people or pets.It powers on the metal mesh, a

Circuit Diagram symbol

From: http://www.360doc.com/content/10/0419/12/952018_23781379.shtml Circuit Diagram symbols are represented by a painting or calligraphy image.The symbols of electronic components (such as capacitors, resistors, diodes, three-pole functions, and integrated circuits). With the circuit diagram symbols, I can learn, dem

Circuit Diagram and legends of a set of Nokia data lines

Nokia line Specification Line Specification Fbus Mbus Fbus mbus Line functions -Sending and receiving faxes and surfing the internet-Send and receive short messages-Edit the phone book (Chinese and English). The Chinese phone book is applicable to 6100 and 6150.-Transmit MIDI music, songs to phone (applicable to 6100 6150)-Change the group display icon (applicable to 6110 6150)-Change the standby Screen-Write workbooks, meetings, and birthday remind

Schematic diagram of the VHDL keyboard jitter elimination circuit and the complete code of the 4 × 4 keyboard

, it is determined that the key is pressed stably. Similarly, if D0 is 0 and D0 is 0, the result s = 0, r = 1, and dly_out is 0. this indicates the key signal to be sampled, which can be sampled for two consecutive times. Therefore, it is determined that it is a stable release button. Similarly, if D0 is 1 and D1 is 0, the result s = 0, r = 0; dly_out will remain unchanged. D0 = 0, d1 = 1. In short, one is output only after two sampling times, and zero is output only after two sampling times. Ho

Interface Design and circuit diagram of the PIC Data Collection System

Icsp Interface Circuit Online serial programming icsp is one of the features of the PIC microcontroller.ProgramDirectly burn it into a single-chip microcomputer, and conduct online serial programming and debugging on the single-chip microcomputer. There are only five lines of the icsp interface circuit, which are VPP, VDD, VSS, PGD, and PGC in sequence. their connection with the PIC microcontroller is as

HDU 5294--tricks Device "minimum cut && shortest circuit processing, new diagram"

question and ask for the maximum flow of 1--N. (2) in the shortest running short circuit with the side array record the shortest short-circuit of the minimum number of sides , m-side[N] is the solution.The shortest path to the most short-circuit processing is the crux of the problem, think for a long time did not want to understand, finally Yu brother to speak,

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