Photoconductive Cell

Photoconductive cell is a two terminal semiconductor device. Its resistance will vary (linearly) with the intensity of the incident light. It is frequently known a photo-resistive device. It is some what different from LDR. The photoconductive materials most frequently used include cadmium sulphide (Cds) and Cadmium selenide (CdS). Both materials reasonably rather slowly to changes … Read more Photoconductive Cell

Light Dependent Resistor (LDR)-Construction and Working

Light Dependent Resistor

Optoelectronics devices are the devices that alters their electrical characteristics, in the presence of visible or invisible light. The various types are light dependent resistor (LDR), photodiode and phototransistor. Construction of Light Dependent Resistor (LDR) Light dependent resistor (LDR) are made from cadmium sulphide which contains no or very few free electrons when not illuminated. … Read more Light Dependent Resistor (LDR)-Construction and Working

Optoelectronics devices – Introduction and Applications

optoelectronic devices

Optoelectronics is the technology which combines optics and electronics. The devices based on this technology are known as Optoelectronics devices. These devices are of two types which are light-generating optoelectric devices and light-sensitive devices. Examples of Light generating Optoelectronics devices The best known types of light-generating optoelectric devices are: The ordinary tungsten filament lamp. Light-emitting … Read more Optoelectronics devices – Introduction and Applications

Assembly Language Program Examples of 8085 Microprocesssor

In the previous article we have discussed about art of programming and different programming techniques of 8085 microprocessor like flow chart, modular programming, top down approach and structured programming. In this article we will discuss some assembly language program and how to write assembly language program (ALP). What is Assembly Language Program Machine language and … Read more Assembly Language Program Examples of 8085 Microprocesssor

Programming Techniques in microprocessor

INTRODUCTION To perform a particular task the programmer prepares a sequence of instructions, called a program. In the previous articles, we have discussed about the 8085 instruction set and addressing modes for this microprocessor. In this article we will discuss the art of programming, procedure for microprocessor program. ART OF PROGRAMMING Programming is a art … Read more Programming Techniques in microprocessor

Generation of Clock and Control signal in 8085 Microprocessor

DIFFERENET CONTROL SIGNALS

Generating Control Signal in 8085 microprocessor As we know that RD (Read) is a control signal. Because this signal is used both for reading memory and for reading an input device, it is necessary to generate two different Read signal : one for memory read control signal and another for input read control signal. Similarly, two … Read more Generation of Clock and Control signal in 8085 Microprocessor

Instruction Cycle of 8085 microprocessor

INSTRUCTION CYCLE

For executing an instruction, a microprocessor fetches the instruction and executes it. The time taken for the execution of an instruction is known as Instruction Cycle. An instruction cycle is consists of a Fetch Cycle and Execute Cycle. The execution of any 8085 program consists of a sequence of READ and WRITE operations. Of which … Read more Instruction Cycle of 8085 microprocessor

Instruction Format of 8085 Microprocessor

Introduction In this article we will discuss about instruction format of microprocessor. Microprocessor performs a task by executing a program written for that program. Program is a set of instructions script to solve one or more problems. Instructions are the directions which a microprocessor follows to perform a task or part of a task. Computer … Read more Instruction Format of 8085 Microprocessor

Addressing Modes of 8085 Microprocessor

Introduction to Addressing Modes In this article we will be discussing the addressing modes of microprocessor. Every instruction consists of two parts. That is what operation is to be performed (called operation code or opcode), and on what this operation is to be performed (called operands). For example, in case of A + B, the … Read more Addressing Modes of 8085 Microprocessor

Instruction Set of 8085 Microprocessor

In this article we will discuss about instruction set of 8085 microprocessor. An instruction is a binary bit pattern which performs a specific function in a system. The entire group of instructions of a system is called the instruction set. Instruction set determines what functions the microprocessor can perform with a single instruction. The instruction … Read more Instruction Set of 8085 Microprocessor