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86 Threads found on edaboard.com: Adc Led
When i tried to use 2 output pins in pic12f675, output voltage on second pin was found less (Voltage divided to half). Can anyone tel me how to fix this. I want to use adc in this micro controller and want to display the change in input voltage on led display. Input voltage to adc is from 2V to 5V and want to display output in 3 digits.
If you can still find them, the LM3914 IC would be ideal for this. It is an led bar graph driver, you supply it a voltage from the potentiometer and it lights the appropriate number of leds in sequence. Alternatively and maybe cheaper, you can use a small microcontroller with an adc input to emulate the LM3914 but it would require some (...)
What is GODONE used for? GODONE is actually a predefined macro provided in some device specific header files of various compilers and refers to the GO/DONE' bit of the adcON0 register of the adc module. BigDog
1. If your PIC is not going to do anything else besides beeing this PID... I suggest you to use a Timer flag to synchronize the adc readings... for that, you need some idea of how much time it takes to process all this program... (for example, add a togglin led, and check with a oscilloscope the minimum and maximum time it takes to perform the proc
there many ways to check the adc is working proper or not but the steps you follow in above blog will give you surety that you configured the adc well correct and its is working fine.
uC is not necessary.. After a proper adc ( Parallel Output ) you may use a Programmable Decoder ( or simply Gates Decoder) to obtain "Flags" for your circuit. Flags means that when digital words ( bytes ) have wanted value a flag is move up and excite the other circuit.
Is the above mentioned is your complete program. Where are you checking, whether the adc conversion is completed or not. I mean this type of code. adcON0bits.GO = 1; //Start Conversion while(adcON0bits.GO == 1); //Wait here until Conversion Complete adc_data = ADRESH & 0x00FF; (...)
Hi ahsan, can you provide a system level schematic of IR proximity sensor, which indicates how does the op amp, adc, led, photodiodes and microcontroller connect to each other?
You forgot to turn OFF the led otherwise : if (adc_value>Temp35) { RB0=1; } else { RB0=0; } +++
adc is working output is shown in bar led . and the data is given to the Port - P1. And again the Port 1 vaule is given to the Port 3 ( just for testing ) nothing showing .. please help me ? #include #include "lcd.h" #include "adc.h" void main(){ unsigned char a = 0; P2 =0x00; P0 =0x00; P1 = 0xff; P3 = 0x00; lcd_init(); lcd
I have taken a project to transfer the human voice via optical communication (led or laser) using PCM. But i have faced problem that i could not transfer the signal over 1kHz using PIC16F887, it gets distorted but i need range up-to 20kHz for voice communication. If i use external adc then could i get any benefit? now i am converting the analog si
Hi there, is there any other way of blinking the led depending on the adc value besides this rtos? using interrupt routine..
Hi all I want to test the adc of dsPIC30f4013, what i really want to see at the output is to control an led brightness by just using a variable resistor. I connected an led to pin 3 of PORTD and my analog input is all PORTB pins. for analog input I'm supplying a 47K potentiometer with 2 volts(DC). the problem i'm having is i run the code (...)
Hello!! i am using LPC2138 to do some experiment with ARM. Started with LPC2138 Because it is available in Proteus. Had write the codes for LCD, UART and led Blinking but the problem i am facing with adc is that, it working well in Keil Simulator. But when simulating it in Proteus, is creating a problem. Like when i connect POT-HG with P0.2
Hi friends, I am trying to implement adc module of 16F676 in MikroC. Please see the code below. A led, connected to RA5 of MCU is made ON/OFF depending on the value of analogue input to AN4 of MCU. I have tested the hardware developing the code in assembly. But when I try to develop the code in MikroC, it does not work. No effect is seen in outp
I need to detect room luminosity. I was thinking to use normal led and op amp to bring the signal to PIC adc. Will the selected op amp in the below circuit be OK?
Hi friends, I am using 1k pot and led with lpc2129.if pot will varry led will be on and off.but output was not came.anybody can help me.here i atached my code .i am using p0.27 as pot (i.e internal adc) #include unsigned val = 0; int main(void) { PINSEL1=0X004000000; VPBDIV = 0x02; //Set the Pclk to (...)
i have problem regrading adc in spartan 3e digilent board. i have made all fsm ,the simulation works well but when i board it didnt work. i have shown the MISO on led 7 and 7 msb adc values in other leds. initiall all leds blinks later all go high irrespective of the input. (...)
Hello I want programs to interface any sensors with 8086 microprocessor using 8255. Programs other than for sensors are also okay (but would be good if i got for sensors) except for adc, dac, keyboard, stepper motor and led. I need the program urgent. I searched as much as i could but did not find any programs for interfacing. Thanks in a
adcON0 and adcON1 need to be within while(1) loop. And i hadn't considered the possibility from 58% to 61% or so which i corrected. And hardware implementation i had some problem as its not indicating. Proteus simulation is perfect for the new code. I will still test and see if i have missed other possibilities
Very interesting presentation of text capabilities. Use uC adc to measure voltage, in code calc make percentage based on measured voltage and show up that on display. You can find lots of LCD/led voltmeters in existing EDABoard threads, just adjust code to show percentage.
Hello!! Everyone i am new to ARM Micro-controller's, few months back purchased a Development Board having LPC2148 Micro-Controller. I did Lcd Interfacing, UART and led also, but having some problem with adc Interfacing. Here is the Circuit for that. 87262 But its not working, LCD is working fine, please help me,
The measurement taken by the PIC is of one voltage relative to the other so you have to measure across the led using ground and the adc input as the two connections. A word of warning - make sure it is safe to connect the two grounds first. Although they are both called ground, a true connection to Earth may not be present in the power (...)
can plz tel me how to display adc output on LCD i'm using LPC2378 this my code /******************************************************************************/ /* BLINKY.C: led Flasher */ /******************************************************************************/ /* This file is part
I am trying to drive an led bar graph with the adc of pic16f877a, I have written and compiled the code in mikroC but it does not simulates as it should on the proteus. I am sharing the code too please help me out. I am using AN0 channel with Vref+ = Vdd and Vref-=Vss, with Left Justified scheme. I am also sharing the proteus simulation. (...)
Warning D:\Testing\MPLAB\adc\Untitled.c; 18.11 function declared implicit int; How to rectify problem in this line ( adc_val = adc_read(1) ) ? adc_val = adc_read(1) The above line uses the library function adc_Read(). This is a function for mikroC. shsn has used mikroC, (...)
Hi guys i have a code that reads light sensor data from sensor board.I need code which reads temperature from sensor board.what will i ve to make changes .can anyone guide me? I am beginner to this WSN. Btw using crossbow kit includes sensorboardApp; /** * This module shows how to use the Timer, led, adc and Messaging compon
If you would like all the leds to dim equally, a photo-resistor would probably be the easiest thing to use. Since the resistance of the photo-resistor changes as the intensity of light changes, you could determine the relative intensity of the ambient light by measuring the voltage across the resistor with an adc. In order to dim the leds, (...)
i have this code built as i am not much used to programming with adc's so plz suggest changes in code required. i want to get led glowing for 3 seconds wen it detects motion then should go off. #include #define led_OUT BIT6 // Bit location for led #define (...)
Dear all, The project I handle need to detect the incoming voltage. I'm detecting 2 x AAA battery (3.3v), when voltage drop below than 2.5V will turn off led. The problem I facing is I cannot get the reading correctly. I using assembly to write. I even copy and paste the code example from the datasheet, I still unable to get correct data. Bel
Hy everyone! I would like to build an usb EEG device. The amplifier part is already working. In order to send the signal to the PC it needs to be converted to digital with pic 18f4550 because this chip has adc and usb data transfer. The program is written in MikroC pro, A0 is used for the signal input, C6 to display functionality with led, C7 to di
how can i make voltmeter with adc0808 without micro controller this is my project in my collage !!! can anyone help me ?!! thx in advance :!:
C1 and C2 are far too big. Use something like 22pF. Connect MCLR pin to +5V via a 10k resistor and place a 0.1uF capacitor from MCLR pin to ground. You need to connect pin 1 of LM35 to +5V. In the real circuit, did you connect the VDD and VSS of the PIC properly? Did you place decoupling capacitors? Remove RV1 and connect the output of the
I would also suggest to take into account the tolerance of the adc since the converters and even the sensors are not 100% accurate. For example you can perceive the result as equal if the difference is less than 5 or something like that. Alex
He wants to change the on/off timing of a led based on a 0-5v input voltage read by the adc. The question is have you written any code or you expect us to provide a ready solution? Post your code.
adc without adc. - Jose Pino's Projects and Tidbits.
you should measure the voltage of the batteries through adc every 10-30s. You can use oversampling to increase the adc resolution from 10 bits to 12 or 14 bits. So if the voltage is under some threshold you change the led color. Also you need some algorithms to detect which kind of battery you have so you change the thresholds according to (...)
I have many example on PIC16F877A. It's is C Code using Hi-Tech compiler. I use Hi-Tech because it's already integrate with the MPLab software. My Lesson. The sample include led, 7 segment, switch, keypad, LCD, comparator, adc, PWM, Timer, Interrupt, EEPROM, UART, SPI, I2C, RFID reader, GSM (AT Command)
hello friends; i am new learner of pic. i am using mplab 8.56v and HI-TECH C compiler. i have done simple led blinking program. now,i want to do programming of adc of pic16f877a. i want to use simple 1 bit input as RA0 and output as PORTB or PORTD. i want to display my output on hyper terminal. please,send me the pgoram. thank you. kishan
Are you going to make a LIGHT LEVEL METER or LIGHT DETECTOR SWITCH or something else... I guess using adc of controller, you can use LDR for any kind of response with the power of programming.
Hello Sorry for delay in reply. Unfortunately I could not find my ATMEGA developement board as well as programmer. I suspect there is some missing code. I am going through the code. For now I suggest you to do some basic tests. 1. Please check whether adc processing is working by giving a temporary output to an led. I think this could be one
hi i have some project that i made i hope that help you so i used just tow 7 degement and i have no problem i give you here the prog that i manage a controle tempreture and i display it also with the picture of the circuit this is the code of th .h file #include <16F876A.h> #device adc=8 #FUSES NOWDT //No Watch Dog T
An LDR is a variable resistor. If you connect one end to 0V and the other end to +5V through a resistor you will get a variable voltage. An adc can be used to digitized that voltage and turn the leds on at certain thresholds. You don't actually need a controller. One comparator for each led would do the job. Keith
plz attach your code,so we can see where is the mistake you can do something like that adc1= read_adc(); adc2=(adc1*5)/1023; if(adc2>=your value) { turn on led } else { turn off led }
Hi, We always start with led blinking, then different projects with led like blinking a bunch of them, lighting them sequentially, lighting them with different delays, lighting them with timer generated delays, then move onto advanced timer functions, adc, comparator, and other peripherals. Take a look
Hi, Take a look at the comparator and adc sections in the datasheet and how to disable them. The difference between 16F877 and 16F877A is the presence of an analog comparator in 16F877A and this needs to be disabled if the related pins are to be used as digital IO. adcON1 = 7; //adc off CMCON = 7; //Comparator off Hope (...)
First of all I would strip the code back to basics. Make sure you are reading your adc correctly. This can be done simply with 8 led's connected to a port (port D?), just use your adc read routine, and copy the ADRESH to the port, you'll soon know if its working or not. Break your code down into modules, confirming each 'module' is (...)
#include <16F877A.H> #device adc=10 #fuses HS, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP #use delay(clock = 20000000) #include "E:\note ngaji\FYP\stuff last sem\code\led experiment\brum\Flexlcd2.c" //========================== void main(void) { int16 temp_adc; int temp; (...)
you should really read the datasheet EXTENSIVELY before you attempt to program any chip. your problems come from your SEVERE lack of understanding of the adc functions of your chip. I always advise people to read the datasheet at least 50x before programming it but for some people, that may be more. if you compare your code with the datasheet
alternatively, you can just use a pot and adc the voltage on its wiper and use that to control your blinking rate.