And by using their ADC register we can interface. When we select microcontroller family for making any project, in which we need of an. Interface ADC with serial port (RS) using microcontroller ( AT89C51). This Project include circuit diagram and source code in C. Interfacing of ADC with microcontroller (AT89C51) project including circuit diagram and source code in C.

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If you have any queries, doubts or feedback on this tutorial please share in our discussion forum. For an ADC with resolution adc8004 8 bits, the step size is The above timing diagrams are from ADC datasheet. Below steps are for starting an ADC conversion. Rickey’s World Toggle sidebar.

What is a software to create that program? ADC is a single channel analog to digital convertor i.

How to interface ADC0804 using 8051 microcontroller (AT89C51)

Preset resistor R10 forms a voltage divider which can be used to apply a particular input analogue voltage to the ADC. This Code is only visible to Registered wigh. Crystal X1 and capacitors C2,C3 are associated with the clock circuitry of the microcontroller.

ADC Analog to digital converters find huge application as an intermediate device to convert the signals from analog to digital form.


V in is input voltage for conversion V fs is full scale Iinterfacing V z is zero voltage D x is data point being measure D max is Maximum data limit D min is Minimum data limit. We note down the steps or say the order in which signals are to be asserted to start a conversion of ADC.

Interfacing ADC0804 with Serial port (RS232) using 8051 micocontroller (AT89C51)

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This is used to instruct the ADC to start the conversion process. In this project we have interfaced three channels of ADC Various sensors like temperature, pressure, force etc And then ADC reads selected channel and send output to microcontroller.

Leave a Reply Cancel reply Your email address will not be published. I tried this circuit, but it is not working as expected. This circuit demonstrates the principle and operation iwth collecting data from ADC and sending it to PC via serial communication using microcontroller AT89C These digital signals are axc0804 for further processing by the digital processors.

When we select microcontroller family for making any project, in which we need of an ADC conversion, then we use external ADC.

ADC has 8 bit resolution. The circuit initiates the ADC to convert a given analogue inputthen accepts the corresponding digital data and displays it on the LED array connected at P0. I have made small changes to the original code. These digital signals are used for further processing by the digital processors. I have changed some modifications too but still its not working. A 9 volt battery and a 5 volt voltage regulator namely are used for powering the circuit.


What is Web Browser. If INTR is low, go to next step else keep checking the status. Read RD pin 2 is connected to P2.

And data pin D4-D7 is connected to pins P2. If you want us to write tutorial for more devices please let us know in the forum.

ADC Interfacing – Microcontroller Course

Keep monitoring the INTR pin. This is an active low output pin. Analog signal has infinite no of values like a sine wave or our speech, ADC converts them into particular levels or states, which can be measured in numbers as a physical quantity. This Code is only visible to Registered users. It also has adc00804 internal clock.