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40 Threads found on edaboard.com: Lcd Voltmeter
The meter in the photo is an lcd type . Then what is the requirement? You can also buy digital meter modules for volt/ammeter. That is to save time instead of starting from a microcontroller and programming...
For simple voltage monitoring, consider a bare lcd voltmeter. $10 or $20. Make sure the description says it can measure its power supply. (Some meters cannot do so.) It draws miniscule current. Put the correct resistor divider across its input wires, so that it gives voltage readings in the range you wish. Tip: Do not allow it to be exposed to ba
Hey,I would like to implement a digital voltmeter with PIC16F877A and an 16*2 lcdbut the conversion is not succeeding,the voltmeter has to measure 0-30VDC but I am not getting good values. Could you please help see the codes here below:#include <16f877A.h> //Header declaration for pic used #DEVICE ADC=10 //definition of ADC bits for conv
Hi. I have just joined this forum looks like a great place. I have just made this Volt ammeter with the 16F877A. I am came across the post about ADC Value Fluctuating in PIC voltmeter and Ammeter lcd PIC16F877A which I have the same problem. From what i have been reading it's been solved. I'm just not to sure what "There was wiri
Go to last page of article. Do each bit such as :- "1.Start with the voltmeter circuit. P1 should be disconnected at this point. Connect a known, accurate voltage source of less than 200 mV to point TPA (test point A) and adjust P5 until the lcd shows the right value. Remove " What is your problem with this? If its getting 100mV, put a pot across
Can any one help me on this. I am working on voltmeter using the adc of pic6f877a with lcd , my code works perfect on proteus but when i implement it, it won't respond fine. At times it display, at times it don't. Pls i need help.
what is the code(c program file for creating hex file) for the digital voltmeter using 8051. here are the major components we have used, 1.ADC0804 2.AT89S52 3.lcd(16X2) 8 bit output from adc and range of vin is 0-5v(where vref/2 left unconnected)
that can measure voltage from 0-30v please give me link for this thanks
hy guyz,i'm working on digital voltmeter and ammeter (130V and 40A,on lcd) using atmega328. it is working well on proteus.but not worknig on verroboard,it shows the constant voltage and current i.e, 130V and 40A(max. does not detect the adc voltage. This is my code. #include LiquidCrystal lcd(7,8,9,10,11
Thank you tanveerriaz and Your post was very useful to me. The program in the link is compiles successfully without error but also i am having problem in the hardware. lcd doesn't show anything. I am using a 16*2 lcd. Please help me.
Hello there ,I have a problem;I want to interface an lcd to PIC16F876A for digital voltmeter 0-30VDC. can you help me to see what's wrong with the below codes? #include "16f876a.h" use portc for output #device adc=10 #fuses HS,NOWDT,NOLVP,NOCPD #use delay(clock=4M) #include "lcd.c" int value; float value1,value2; char *volt =
hello, If you want to do progress split the problems. Is your Mikroc an official versus (not cra..ed) or limited versus 2Kmax ? is it ADC problems or display problems. Try to put a constant into your code v=512; // middle scale of voltage i=256; // a quota of the scale for Amps and see what result you get on lcd. if OK , check ADC part use
Hi All, I am very new here I have collect the following c-code for 20V lcd voltmeter using pic16F688, now i want to activate RA0 pin high when lcd voltage is grater than or equal 10.0v, what is the change need in this code? Please help.... char Message1 = "DVM Project"; unsigned int ADC_Value, DisplayVolt; char *volt = "00.0
I am trying to read the temperature value on a LM35 sensor via ADC0804 to AT89C51 this is my code in mikroc: // lcd module connections char OW_val; sbit lcd_RS at P0_2_bit; sbit lcd_EN at P2_3_bit; sbit lcd_D4 at P2_4_bit; sbit lcd_D5 at P2_5_bit; sbit lcd_D6 at P2_6_bit; sbit (...)
Hello, I tried to made Digital voltmeter and Ammeter Here's the Circuit Problem's M Facing:- 1) Voltage and Current both values fluctuating..constantly... 2) Not measuring the voltage or currre
i have design of AC voltmeter from about 50-300V AC using PIC16F676 and 3 seven segment lcd circuit and pcb details are here and can easily convert to 0-300V if using a standalone 5v supply
I have made a digital voltmeter you can use as voltmeter part, as ammeter part use a piece of cable (you must know the resistance per meter) or a high powered low valued resistor (shunt resistor - generally aluminium shield resistor). The microcontroller is pic16f877a and 1602B lcd screen, and codes in pic ccs c complier.
I have a pic 16f73 based ac volt meter.the volts on Adc pin vary from .87v to 1.58v the respective lcd display is from 170v to 230v. .87v=170v .93v=175v .99v=180v 1.05v=185v 1.11v=190v 1.17v=195v 1.23v=200v and so on.i am unable to understand adc math for this conversion.can any one explain it.Vref = Vdd in the circuit.
You can use thise project and adjust code for your needs just to shows voltage on lcd, and most important you have example of ADC conversion: code is writen in MikroC. For higher input vol
You can write a code that will read voltages through ADC pins of the PIC at preset intervals (usually .5secs) and then display it on the lcd. Here is a link to a video :
Hi I am using 10 bit ADC and the coding has been done in Assembly Language. I need to display the input voltage (which is scaled by 2.5 ) on the lcd . Pls suggest me on how to do this in ASM as it involves lot of floating point multiplications and all... Thanksss There are some programmers who quite a
Chips ICL7106 (for lcd display) and ICL7107 (for LED display) are phenomenon in electronics. Although they were designed 30 years ago, they are still in use. Despite many attempts, such as integrating a converter, ad
pnjbtr, Thanks a lot for the circuit, BUT I did not want lcd (I had this already) but the LEDs. Anyways that is solved long back. I may upload that here for others to be benefited.
Hallo Viewers, I get a good and simple lcd based voltmeter with PIC16F688 form can measure only 1.5 V to 20 V DC. But i need to change the Voltage range between 1.5 V to 70 V DC. can anyone know how to convert the source code for given purpose? I dont know to change the source code. This this the programme code of the PIC16F688 and t
You can do it with an mcu (search google using pic or avr voltmeter) A simple PIC lcd volt meter project. AVR Project : Digital voltmeter - Microcontroller Project Circuit Also check this thread www.eda
There are el-cheapo miniature voltmeter modules with 7-segment LED or lcd display, and all what you have to do is to add a voltage divider to scale the input .. Here are examples with diagrams: IanP ;-)
Yeah it's called Google, Goolge is your friend :-D A simple PIC lcd volt meter project. PIC Volt Ampere Meter
I have some problems with this voltmeter (value reading are not stable and are not linear). I configured resistive divisor at imput 1 (AN0) to match lower limit voltage, but when I rise the voltage to be measured, the pic reading is lower than real voltage) and is not stable. Could anubody help me ? this is the code: #include <16F876.h>
Here is a simple voltmeter circuit based on a PIC: It takes 0-5V, so the input of 50V has to be divided .. The simples thing to do is to use a resistive voltage divider .. Here is an example (select 47kΩ as R1 and 5.1kΩ as R2):
Hi all, I want to make a numeric voltmeter, with atmega16 processor and an lcd display 2X16 (with 14 pins). I tried to make a program but it didnt worked. It only displays: Volts = 3fV Can anyone please help me with this. Many thanks. /***************************************************** This program was produced by the Code
u want to make a Digital voltmeter lcd/7-segment LED display?? AC/DC ?? voltage range ??
You can use PIC18f1320. it have 18pin. for display you can go with lcd display at 4 bit mode. this accomplish only 7 pin. . If you go for 7 segment it require 12pins Display purpose. also it have some complicated in program for float value. you can measure voltage ADC pin then display the value at display. if you want more details means pls ask.
i search plan for voltmeter and ampmeter on lcd display thanks
Goto: and see sections on lcd and ADC interfacing .. I would start with lcd interfacing and once you know how to display a character or a string of numbers/characters add the source where these numbers should be extracted from - ADC .. Regards, IanP
hi, i m building lcd and pic based project and encountered few problems : 1. pic16f877a has 2 pins for vdd and 2 for vss. i checked them with voltmeter and they are shorted do i have to short them with wire ?? 2. when working with 4 data line mode of the lcd do i have to connect the other unused lines of the lcd to vss (...)
have u seen data sheet for pic16f628. i cant see any adc. '****************************************************************************** ' microcontroller P16F877A ' ' Project ADC_on_Leds ' This project is designed to work with PIC 16F877A ' with minor adjustments, it should work with any other PIC MCU ' that has ADC module. ' ' This c
You can't replace 7107 IC with 74(XX) .. on top of the 8-segment lcd driver it has A/D converter which is not available in the 74-series .. Theoretically speaking, you can employ several 74-ICs + A/D converter - but - how would you compare a suitcase full of ICs with one small structure ??? Regards, IanP
Hi Tryo yes you can measure up to 4 voltages on the pic16f877 but rember that max input on pic is 5v to measure 12v you will have to use a resistor devider network so you dont exceed 5v and use the software to compensate for voltage loss (i.e input * 10 so 1.2V fed into pic through resistor net work would read 12V on lcd you can even display it
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1. Serial interfacing lcd with Pic Microcontroller 2. Software SPI interfacing ADC with Pic16F84/Pic16F628 3. Simple multi channel digital voltmeter 4. Stepper motor controller