Basic electronics fundamentals – Section – V


Basic electronics fundamentals - V The different types of ADC are successive approximation ADC, counter type ADC flash type ADC, integrator converters and voltage to-frequency converters. Stack is a sequence of RAM memory locations defined by the programmer. The program counter keeps track of program execution. To execute a program the starting address of the program is loaded in program. The PC sends out an address to fetch a byte of instruction from memory and increments its content automatically. The timing and control unit synchronizes all the microprocessor operations with clock and generates control signals necessary [...]

Basic electronics fundamentals – Section – V2019-10-30T04:37:13+05:30

Basic electronics fundamentals – Section – IV


Basic electronics fundamentals - IV Polling is a scheme or an algorithm to identify the devices interrupting the processor. Polling is employed when multiple devices interrupt the processor through one interrupt pin of the processor. The polling can be classified into software and hardware polling. In software polling the entire polling process is govern by a program. In hardware polling, the hardware takes care of checking the status of interrupting devices and allowing one by one to the processor. The interrupt controller is employed to expand the interrupt inputs. It can handle the interrupt request from various [...]

Basic electronics fundamentals – Section – IV2019-10-23T01:52:44+05:30

Basic electronics fundamentals – Section – III


Basic electronics fundamentals - III The CPU bus has multiplexed lines but the system bus has separate lines for each signal. (The multiplexed CPU lines are de-multiplexed by the CPU interface circuit to form system bus). The system clock is necessary for synchronizing various internal operations or devices in the microprocessor and to synchronize the microprocessor with other peripherals in the system. The direct data transfer between I/O device and memory is called DMA. When the I/O device needs a DMA transfer, it will send a DMA request signal to DMA controller. The DMA controller in [...]

Basic electronics fundamentals – Section – III2019-10-22T01:53:39+05:30

Basic electronics fundamentals – Section – II


Basic electronics fundamentals - II A digit of the binary number or code is called bit. Also, the bit is the fundamental storage unit of computer memory. The 8-bit (8-digit) binary number or code is called byte and 16-bit binary number or code is called word. (Some microprocessor manufactures refer the basic data size operated by the processor as word). Bus is a group of conducting lines that carries data, address and control signals. The microprocessor has to fetch (read) the data from memory or input device for processing and after processing, it has to store (write) [...]

Basic electronics fundamentals – Section – II2019-10-22T01:40:42+05:30

Basic electronics fundamentals – Section – I


Basic electronics fundamentals - I It is a program controlled semiconductor device (IC}, which fetches, decode and executes instructions. The basic units or blocks of a microprocessor are ALU, an array of registers and control unit. The Software is a set of instructions or commands needed for performing a specific task by a programmable device or a computing machine. The Hardware refers to the components or devices used to form computing machine in which the software can be run and tested. Without software the Hardware is an idle machine The language in which the mnemonics (short [...]

Basic electronics fundamentals – Section – I2019-10-21T00:26:41+05:30

Basics of speakers


Basics of speakers Speakers are used you to listen to music on your phone, enjoy a film at the cinema or hear a friend’s voice over the phone. Basically speakers convert electrical signal into an audible sound, speakers contain an electromagnet, a metal coil which creates a magnetic field when an electric current flows through it. Inside a speaker, an electromagnet is placed in front of a permanent magnet. The permanent magnet is fixed into position whereas the electromagnet is mobile. As pulses of electricity pass from the audio IC through the coil of the electromagnet, the direction of [...]

Basics of speakers2019-10-15T02:52:03+05:30

How does continuity mode work in multimeter?


How does continuity mode work in multimeter? If there is very low resistance between two points, which is less than a few ohms, the two points are electrically connected and you’ll hear a continuous sound. This mode is also called as “diode mode”, “buzzer mode” If the sound isn’t continuous or if you don’t hear any sound at all, it means that what you’re testing has a faulty connection or isn’t connected at all. Note : if you are testing continuity you must should turn off the system. Turn off the power supply. Touch the two probes together [...]

How does continuity mode work in multimeter?2019-10-15T02:22:57+05:30

Mobile Phone Repairing Tools and Equipment


We can see here some equipment’s and tools  for mobile service 1.Soldering Iron or Soldering Station: Used to Solder components 2. PCB Stand: Used to Hold PCB 3.Solder Wire (Lead): Used to Solder 4.IPA solution: Used to Clean PCB 5.Jumper Wire: Used to joint an One Point to another Point on aPCB 6.Blade Cutter: Used to Cut and Remove Lamination 7.Precision Screwdriver set: Used to Remove and Tighten Screws from Mobile Phone 8.Tweezers: To Hold the Components during removing or fixing on PCB board 9.Brush: For Cleaning 10.Multimeter: To Check [...]

Mobile Phone Repairing Tools and Equipment2019-10-15T02:58:20+05:30

Small intro about diodes


What is a Diode? A diode which passes only the electric current of a particular polarity from one side. This is used for rectification and switching.Several types of diodes are used in electronic instruments and gadgets. Chip diodes are used in mobile cell phones. Those are surface mount devices (SMD). Surface mount devices are soldered with special soldering technique Facts about Diodes Indicating in schematics of Diode: D or V or PD Function:ConvertingAC to DC and Do the Switching. Types of Diode in Mobile Phone and their Function 1. Signal Diode This type of diode is used for detecting signals. These diodes are made of [...]

Small intro about diodes2019-10-08T03:13:51+05:30

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