Volume control circuit

It is Siemens s7200 PLC, start, hold, stop control circuit and program, we know this program on the right, it is pure ...

As an emerging discipline in the field of electrical information, electrical automation is closely related to people's daily activities and industrial production. During production work, pass ...

The layout of electrical components mainly shows the actual location of all electrical components on electrical equipment, and provides necessary information for the installation and maintenance of electrical equipment. Electricity...

In this paper, the model establishment and analysis of the semiconductor laser temperature control circuit used in communication equipment, and from the perspective of automatic control ...

The current-limiting resistor is integrated inside the PWM OUT output of the general IC.

This article mainly introduces the high and low water level control circuit diagram Daquan (six high and low water level control circuit schematic diagrams). Water level control circuit. The control circuit consists of ...

The constant current electronic load system measures the output energy or consumed energy of AC-DC and DC-DC power supplies, power devices, batteries, battery chargers, etc ...

SCR is short for SCR. There are several types of thyristors, one-way, two-way, shut-off and light control. It has small size, light weight, high efficiency, ...

At the same time, with the development of many high-tech, switching power supply technology is constantly innovating. The design of switching power supply should take safety and reliability as the first principle, ...

(1) Functional block diagram of designing the system according to the determined drag scheme and control method. (2) Design the specific circuit of each part in the functional block diagram. design...

This paper presents an FPGA design method for the optical switch module control circuit. Set the channel through the hardware, and the FPGA reads the channel information and enters it ...

Optical coupler (optical coupler) is also called photoelectric isolator, photocoupler or photocoupler. It uses light as a medium to transmit electrical signals ...

When designing electrical control circuits, we must first understand the requirements of the production process for the control circuit, and secondly understand the structure, working environment and operation of the production machinery ...

The brushless DC motor driven by the square wave has a large torque and reliable operation. It is widely used in electric vehicle controllers. The biggest disadvantage of the square wave drive is that when commutation ...

Motor lock system: In the alert state, the controller automatically locks the motor when alarming, the controller has almost no power consumption, and has no special requirements for the motor.

The touch key type remote controller is based on Renesas' R8C / 33T touch key remote control panel and touch panel. The touch remote control consists of a circle of 4 channels ...

Research on motor start is very important for the safe operation of the motor. There are many ways to start the motor. The main ones are full-pressure direct start, auto-coupling decompression start, y-δ start ...

Most products and equipment that use DC-DC converters or motor inverters must rectify the AC voltage of the mains. For example, most industrial equipment (...

Embedded system is a "specialized computer system that is completely embedded inside the controlled device and designed for specific applications", for control, monitoring or auxiliary equipment, ...

This article introduces the hardware part of the design of inverter power supply quality and reliability improvement. The control method of inverter power supply is not unique, every control method ...

This article introduces an LED dimming control system based on the constant current drive circuit LM3402, which consists of a microprocessor P89LPC932 ...

Embedded system is a "specialized computer system that is completely embedded inside the controlled device and designed for specific applications", for control, monitoring or auxiliary equipment, ...

Adopting the scheme of "NC constant current source + high precision temperature control", the LED control system is designed, and the PID control algorithm is introduced into the system.

This article introduces the ZXSC100 application circuit, IR1150S application circuit and regulated power supply circuit, mainly for the principle of the circuit itself ...

This article analyzes the circuit diagram of high voltage pulse width modulation (PWM) LED driver controller in detail.

The rectification part is a three-phase bridge type uncontrollable rectifier, the inverter part is an IGBT three-phase bridge inverter, and the output is a PWM waveform, and the intermediate DC link is ...

When charging is over, people often forget to unplug the power supply, or even charge the battery for several days, which is undoubtedly a damage to the function and life of the battery ...

The design of a car USB charger with line compensation function is introduced, which makes the voltage of the USB charging port increase with the increase of current.

This system is a remote automatic control system used in the smart home environment based on infrared and GSM networks. The system is safe, reliable, and stable in performance. with...

This paper designs and produces a power supply that is convenient for simulating the actual working state of automobile solenoid valves. According to the working requirements of solenoid valves in automobiles, the solenoid valves are ...

The LED lighting control system is composed of a remote control and a high-power LED dimmer. Both sides are realized by the CC2530 module with built-in RF4CE protocol ...

The remote control is a device used to remotely control the machine. It is mainly composed of an integrated circuit board and buttons used to generate different messages.

The servo is a position servo drive. It receives a certain control signal and outputs a certain angle, suitable for those who need the angle to change continuously and can guarantee ...

In the industrial production process, the measurement problems of various flow media and the accurate measurement of flow rate have become the current industrial measurement and control system, energy measurement management and other fields ...

Ethernet IEEE802.3a power supply equipment (PSE) solution, without external components can automatically manage four 802.3 ports, ...

This product belongs to the new SAM L21 32-bit ARM processor series. When it is active, the power consumption per megahertz processing speed is less than ...

The system is mainly composed of light detection circuit, pyroelectric infrared sensor and processing circuit, single-chip system and control circuit.

In order to meet scientific remote sensing experiments, complete remote sensing tasks, coordinate multi-component work in UAV electronic pods, and control the attitude of remote sensing image sensors, the system ...

In the UAV flight control system, the flight controller is its core component, which is responsible for the signal collection of the flight control system, the calculation of the control law, the attitude of the aircraft ...

Smart cars, also known as driverless cars, belong to a type of wheeled mobile robot. They are a collection of multi-functions such as environmental perception, path planning, and automatic driving ...

The classic four-resistor difference amplifier seems simple, but its performance in the circuit is not good. Starting from the actual production design, this article discusses the discrete resistance, ...

In the picture, IC1 and IC2 are two sets of LM386, which are connected into OCL circuit. C1 plays the role of power supply filtering and decoupling, C3 is the input coupling ...

With the continuous deepening of research in the fields of radar detection, instrument measurement, chemical analysis, etc., not only the qualitative completion of target detection is required, but also the need for high precision ...

In this paper, a design method based on 89C51 single-chip microcomputer and CAN bus is adopted, and the overall design scheme of the heating temperature controller is given, as well as the main electrical ...

This article will introduce the principle circuit diagram of using voice chip ISD1016 to replace the ringtone message controller with voice. The controller can store ...

The TDA2030A power amplifier board is powered by an attenuating tone control circuit and a TDA2030A amplifier circuit and power supply controlled by high and low ...

This design researches and improves the current LED bulletin board system on campus, and adds ZigBee on the basis of the original LED bulletin board ...

This paper designs a medical instrument based on 2μm high-power fiber laser, with STM32 as the control core, and completes humanized human-machine touch ...

EFM32TG840 has 5 low power consumption modes of EM0-EM4. In the low-power mode of EM2, the microcontroller can still achieve R ...

The STM32F103VET single-chip microcomputer of the main control module is the core of the controller.

Using STM32F103 as a microprocessor, design a low-cost wireless WiFi music player system, combined with receiving WiFi data ...

Taking home as a platform, using computer technology, digital technology, network communication technology and integrated wiring technology, the anti-theft alarm system closely related to family life ...

It mainly introduces the electronic circuit design of permanent magnet brushless DC motor control system based on field programmable gate array and EDA methodology.

Using FPGA as the control core, the design of a digital converter test system is developed. The system communicates with the computer through USB and can generate calculations ...

FPGA-based digital nuclear pulse analyzer hardware design program, the program uses field programmable logic components (FPGA), complete digital multi-channel ...

Solar cells have a long life span. As long as there is sunlight, solar cells can be used for a long time. Compared with some traditional energy sources, solar energy does not pollute the environment ...

Digital photo frames can also promote static pictures into dynamic albums, easy to carry, long storage time, meet people's needs, and will also be one ...

Direct digital frequency synthesis DDS (Direct Digital Syndaesis) is a key technology for digitalization ...

When the single-chip microcomputer application system is working, in addition to entering the system's normal initialization, when the system is in a deadlock state due to program operation errors or operation errors ...

At present, most temperature monitoring systems use RS485 communication mode, which has the limitations of small monitoring range, cumbersome wiring, etc., and the application system of single chip microcomputer ...

The digital security system comprehensively utilizes modern sensing technology, digital information processing technology, computer technology, multimedia technology and network technology to realize the community ...

This system uses ordinary power lines to transmit control signals to achieve intelligent control of the lamps. By installing the control module, you can easily achieve intelligence.

The energy monitor is designed as a complete set of tools for measuring and displaying the energy consumption of various loads (such as major household appliances) in smart buildings. With this tool, the ...

This system uses the single-chip microcomputer AT89C51 as the control core, and the computer as the host computer to realize the automatic control of the switch status of 8-way home appliances on the computer ...

The design adopts the enhanced high-speed single-chip microcomputer STC12LE5A60S2 as the controller, and SIM300 as the wireless GPRS communication module ...

There are many ways to realize the frequency conversion control of frequency conversion home appliances, each has advantages and disadvantages, but which method has lower cost, higher efficiency and better effect is our concern ...

Introduced the design of PWM / voltage output circuit, I \ O port circuit and QEP circuit in the machine vision system, so that developers can pass the circuit ...

In order to improve the quality of medical services in the inpatient department of the hospital, fully embody the people-oriented service awareness, and implement the guiding ideology of building a harmonious society, it is necessary ...

Through the central management platform, make home life comfortable, safe, convenient, energy-saving, healthy and environmentally friendly. Similar names include digital home, digital word garden, network ...

In this system, the 51 series AT89C51 chip is selected. AT89C51 is a programmable erasable read-only with 4k byte flashing ...

When it comes to controlling fans, the use of thermistors instead of thermocouples has become more popular. The use of thermistors to control the temperature is nothing new, ...

The fully differential instrumentation amplifier has the advantages that other single-ended output amplifiers do not have. It has strong common mode noise source anti-interference, which can reduce the second harmonic loss ...

This paper presents an implementation plan for realizing intelligent home appliance control system through remote telephone. Introduces the control interface circuit between home appliances and telephones, discusses ...

The hysteresis oscillator combined by Q1, Q2 and U1 can be used to stabilize the lighting of the lamp. In operation, the full-wave bridge D3 can be used in AC lines, or ...

This paper designs a vision-based walking robot system for the purpose of high-speed line hunting. The system uses a high-performance single-chip microcomputer to complete the video capture ...

Aiming at the special occasions of LED application such as machine vision recognition, a high dynamic range LED analog tuning based on ZibBee control is proposed ...

When the application circuit of the intelligent lighting control system uses a microcomputer time-controlled switch alone, once the light is dark outside the power supply time range. Need to mention ...

The circuit system is the core of the smart car hardware system. For this hardware circuit system, stability is a performance index that needs to be guaranteed first.

The design of intelligent lighting system is divided into three parts: master control module, slave control module and illuminance sensor module. The slave control module can set multiple addresses, the master control module ...

According to the demand of piezoelectric ceramic micro-displacer for driving power, the scheme of piezoelectric driving power system is designed. The program first introduces the digital ...

The intelligence of the intelligent lighting control system is mainly reflected in two major functional modules, one is an intelligent dimming device, the other is the detection, display and ...

This article introduces the indoor lighting control system and its principle based on AT89C51, and puts forward an effective energy-saving control method. The system uses ...

The design and implementation of an embedded speech recognition module with ARM as the core is introduced. The core processing unit of the module selects ST's ARM-based ...

This paper designs a system that uses a single chip microcomputer to control the AD5933 to achieve impedance measurement. ADμC848 of ADI Company that the one-chip computer chooses. single...

The program uses a PC and DSP equipped with a data acquisition card as the hardware foundation, and uses LabVIEW software to transmit the letters transmitted by various sensors ...

DC motor is a commonly used drive equipment in industrial production, with good starting and braking performance. The control of early DC motors was based on analog circuits ...

The core processing unit of the module selects ST's 32-bit processor STM32F103C based on ARM Cortex-M3 core ...

This article transforms the traditional home lighting system, electric fan and TV set to make it become a smart home appliance with voice recognition function, due to conditions ...

The LED is best driven by a constant current source. For LED applications that require smaller currents, a linear drive scheme is sufficient. But in the LED requirements ...

The signal source of the traditional frequency sweeper mostly uses the oscillator composed of the LC circuit. A large number of discrete components are used to achieve each function.