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The electric chair was invented by a dentist.
 

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lcdMore microcontroller devices are using 'smart LCD' displays to output visual information. The following discussion covers the connection of a Hitachi LCD display to a PIC microcontroller. LCD displays designed around Hitachi's LCD HD44780 module, are inexpensive, easy to use, and it is even possible to produce a readout using the 8 x 80 pixels of the display. Hitachi LCD displays have a standard ASCII set of characters plus Japanese, Greek and mathematical symbols.

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A relay is an electromagnetically controlled on-off switch, used to isolate control electrical circuit from part of circuit that contains load. Current flows through the coil of the relay and creates a magnetic field which moves a lever and changes the switch contacts.

Relay                   relay                        

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switches

In electronics, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another. A switch may be directly manipulated by a human as a control signal to a system, such as a computer keyboard button, or to control power flow in a circuit, such as a light switch. Automatically operated switches can be used to control the motions of machines, for example, to indicate that a garage door has reached its full open position or that a machine tool is in a position to accept another workpiece. Switches may be operated by process variables such as pressure, temperature, flow, current, voltage, and force, acting as sensors in a process and used to automatically control a system.

There are a lot of types of switches. We will explain a few common used in microcontroller based systems.

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Digital-Capacitance-MeterThere are several methods for readout of sensor capacitance using microcontroller. Each of them has certain benefits and is used depending on microcontroller capabilities. These methods are:
•    Capacitive Voltage Divider (CVD)
•    Charge Time Measurement Unit
•    Relaxation Oscillator-Based Technique
•    Capacitive Sensing Module

 

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Subcategories

  • Communication

     

    For communication with outside world and other components microcontroller uses many different kinds of communication. Here you will find detailed explanation on how each of these communication protocols. Details of principles how the work, what you must know before you can use them. And when finished here you can go to tutorial sections for specific family and get complete example codes and detailed description on specific microcontroller family. These are UART, I2C, SPI, USB…

     

  • Measurement

     

    Basic functions that every device does are measurement and control. That is why it is important to know how to properly measure something and what sensor to use.. Here you will find explanations on these topics to help you with implementing hardware for your microcontroller project.

     

  • control

     

    As previously mentioned Control is one of most important things in every project. Weather you need to control some DC motor using PWM, timer circuits with NE555, Using servo motors, Using PID regulation or any kind or regulation you will find useful articles here describing basic term from this are that you need to know before you can start making your project. Here are mentioned only few of areas this category of www.electronics-base.com covers. PLL frequency regulation… list is endless. When you get the basics you can get example codes written in microcontroller C compiles on tutorials page or find complete project with source code and all documentation in projects section of the site.

     

  • Other

     

    General descriptions not fitted in any specific category from field of electronics.

     

  • Microcontrollers

     

    General explanations about microcontroller specific topics. What are GPIO pins, TTL levels, Reset circuit.. If you have just started to work with microcontrollers and do not have much knowledge about them than here are useful texts to read before you go to tutorials or complete projects section of www.electronics-base.com and continue learning about world of intelligent electronics.

     

  • IR
  • Gas Sensors

     

    This category contain articles about gas sensors, their principles of work. There are several common techniques of gas sensing, such as electrochemical, catalytic, infrared etc. Found out more information about carbon monoxide, carbon dioxide, methane, ammonia, hydrogen sulfide, LPG, oxygen and many more gas sensors. Explanation about common schematics and microcontroller usage are given. Visit http://www.electronics-base.com.