Please send me the link or send me the HEX file directly. Your email address will not be published. Subscribe in a reader. Equipment Required of project : we are using these components common andoe 7segment displsy pic microcontroller 16f 14 pin base resistor 10k,10k veriable resistors for voltage regulator uf. Select the compiler and path location for your project. Previous Introduction to Multiplexer. Next Proteus Library for Regulator. This minimum analog value is called resolution.
Hence by using these values in the above formula, this minimum voltage will be:. Liquid crystal display is used to display values of voltage. As shown in the figure below. The below diagram shows the result of the digital voltmeter using the pic microcontroller and LCD display. Above I have discussed the function of each component and its working in dc voltage measurement with pic microcontroller. The code for digital voltmeter is written using the MikroC Pro compiler.
This code is written using MikroC for Pic compiler. This code is placed inside the while 1 loop function and it keeps executing. Second line converts measured digital value back into analog voltage by multiplying voltage variable with resolution factor and voltage divider scale down factor. After that we display voltage value on LCD second line. This digital voltmeter using a pic can read voltage only between volt.
High voltage measurement voltmeter can also be designed using pic microcontroller and difference amplifier. The difference amplifier will be used to step down dc voltage instead of a voltage divider. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Email Address. I like the project of greenhouse control. Can you please tell me what it is and what is its purpose there. Thank you already man. I tried to build this circuit and code to measure voltage between 0 — 12 V , you used it to measure between 0 — 40 V.
I know to make this circuit measure form 0 — 12V or 0 — 9V I have to change this code depending on the resistors I used. Could you please help me and explain this part of code, and which part do i need to change and why? Bilal I need your help. Hi bro …. Hi,sir How to display charging percentage on LCD display using microcontroller in power bank. Could you please send me the. My Email: [email protected].
I have make a test board with pic 16fa and i am trying first to show on my LCD the message you have write at your code without success. There is no problem with my programmer as i have tested with another hex file and works properly.
Could you please advise whats wrong? I am using all the options you have at your video and i have generated the hex file over the Micro C program Micro C Pro.
Hello Bilal, First of all, thank you for your detailed explanation, it is really useful. You can find more about driving multiplexed 7 segment led display from a pic mcu in application note from microchip AN Four Channel Digital Voltmeter with Display and Keyboard. In my circuit the refresh rate is about 50hz. Voltage Divider Front End As you can seen in the schematic the 47k resistor and 10 k trim pot is connected ias a voltage divider configuration. So what we have to do is make such voltage divider that can divide out maximum range 30 volts to 5 volts.
And to keep as less as possible attenuation on the under test voltage we have to keep the voltage divider resistor value in few thousand ohms because it takes very little current from the target but as much to drive adc of pic. The capacitor 0. The 5. Accuracy and calibration Overall accuracy of this circuit is great but it totally depends on the values of 47K resistor and 10k trim pot.
As fine as you can go by adjustment of the trim pot your accuracy goes fine. Calibration of this circuit is done by adjustment of the 10k trimpot around value of 7.
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