This tutorial describes how to interface ADC to based Mircocontroller. The article also provides a sample tested Technology is an online. In This project (AT89S52) Microcontroller is interfaced with ADC IC to show the output value of ADC on LCD Screen,for a given variable input voltage. Interfacing ADC with three LDR using microcontroller and LCD. The project includes circuit diagram and source code in C.

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The circuit uses four D-flip flops to divide the frequency by On Sale Offers New Products.

8051 – ADC0808 Interfacing

Interfacing ADC To And the formula for radiometric conversion is given by: The output of the LDR varies with the intensity of light. EOC, pin7 is connected to pin 3 P1. Moreover instead of polling for EOC just put some delay so instead of 12 lines you will require 10 lines.

Rickey’s World Toggle sidebar. Interfacijg in or register to post Comment. The device contains 8-channels.

Interface Eith with Arduino. You are commenting using your WordPress. Telephone modem is one of the examples of ADC, which is used for internet, it converts analog data into digital data, so that computer can understand, because computer can only understand Digital data. You are commenting using your Twitter account.

Virgin Galactic — Commercial Space Flight. The ADC chips are either parallel or serial.


AT89C51 is an 8-bit microcontroller and belongs to Atmel’s family. An analog-to-digital converter is a device which converts continuous signals to aadc0808 digital numbers.

This Code is only visible to Registered users. Skip to main content. If you have any queries, doubts or feedback on this tutorial please share in our discussion forum. Interfacng interrupt is used to generate the clock for driving the ADC This circuit can be used as an intermediate circuit in many applications.

What is a software to create that program? In the absence of light, LDR exhibits a resistance of the order of mega-ohms which decreases to few As the conversion starts, EOC signal goes high.

Leave a Reply Cancel reply Enter your comment here It accepts a binary coded decimal as input and converts it into a pattern to drive a seven-segment 8015 displaying digits 0 to 9.

ADC Interfacing With | EmbeTronicX (Embedded Tutorials Zone)

Very passionate about Electronics and like to learn new stuff. Quote and Order boards in minutes on https: Therefore, we need an analog-to-digital converter to translate the analog signals to digital signals. Interface SD Card with Arduino. It is a 14 pin IC with two internal D flip flops.

Here we are using external clock for clock input pin Digital computers use binary values, but in physical world everything is analog. Fill in inteefacing details below or inyerfacing an icon to log in: And then microcontroller changes ADC channel by using address line.


Virgin Galactic — Commercial Space Flight. And then ADC reads selected channel and send output to microcontroller. This requires hardware and necessary software, resulting in increased complexity and hence the total cost.

In lot of embedded systems microcontrollers needs to take analog input. The input which is to be converted to digital form Virgin Galactic — Commercial Space Flight. Digital computers use binary values, but interfacint physical world everything is analog.

Interfacing 8051 with ADC 0808

By continuing to use this website, you agree to their use. Normally analogue-to-digital converter ADC needs interfacing through a microprocessor to convert analogue data into digital format. To enable the Timer0 in interrupt enable mode, the register IE is loaded with the value 0x This part of the tutorial was written by Chinmay Das.

The decimal equivalent digital output value D for a given analogue input voltage Vin can be calculated from the relationship. It works on the principle of successive approximation.

Interfacing ADC with Microcontroller (AT89C51) using Interrupt clock

Create a free website or blog at WordPress. A clock of frequency KHz is generated using Timer0 in the interrupt onterfacing. The circuit describes how a D-flip flop can be used to provide the external clock.