arduino uno

Good morning I am getting the arduino uno with the monitor. Want to have 5 booton and clicking individually to my display a MESSAGE on the screen when the potato and when let off. these be in the second row while the first shows to permanently temperature from someone sensor someone can help. thanks

Topic by ssakiss1   |  last reply

arduino uno?

Do i have to push the reset button before uploading a another file 

Question by robot1398   |  last reply

Arduino UNO R3

I want to make projects on Arduino UNO R3 . In fact i made one that is 3x3x3 LED Cube. But facing some problem.  I don't want to use Arduino all time. Please any one tell me the alternative for this. I want to do like this picture but i don't know the connections for this. PLEASE HELP ME

Topic by Tech Works   |  last reply

arduino uno programe

I am new to arduino programing and have below query. i am getting below content in abc and wanted to parse and compare with current time. char abc[128] = Fajr5,04:40 Sunrise6,06:03 Dhuhr13,12:39 Asr17,17:16 Sunset19,19:15 Maghrib19,19:15 Isha21,20:37 ; how do we parse and get something     String time[] = 04:40 06:03 12:39 17:16 19:15 20:37 ; and then split and compare with current time. i am getting time from ds3231, hh=hour and mm=minute then compare like below     int h = time.Split(' ')[0].Split(':')[0]; // this is 04     int m = time.Split(' ')[0].Split(':')[1]; //this is 40     if(hh== h && mm==m)     {         Serial.print("Fajr");     }

Topic by sayedfar 

arduino uno programming?

I want a code in which as there is a change in resistance for sone millisecinds, arduino turns on led for a specific period of tie

Question by yhdesai 

arduino uno detection

Hello evry one i've got a weird issue :( i have an arduino uno R3 and it was working fine. now my computer doesn't detect it (i can't find even the com port or non identified devices in the device manager) that was when i was trying a GSM shieled with 9V 2Amp power like the datasheet says the weird thing that when i plug my arduino to the USB 3.0, the light "ON" on the board turn on, but when i plug it to USB 2.0, nothing happen. what i did: i remove evry other connection from the arduino i tried with another cable i tried other devises on my USB 2 and 3, they works fine i tried to use my arduino on another computer, same problem (i dont have another arduino to know what's making this problem) i tried to reset (with button and with jumper) -> the led L does not blink what i think the problem is: probably the problem is in the arduino not the computer maybe when i plugged the power 9V 2Amp and plug to the computer in the same time (and i dnt think it can be a problem) maybe there is a problem with the bootloader please help me, at least how can i know what it the problem, did i harm something or evrything

Question by HassenA1   |  last reply

Burning Arduino Uno Bootloader

I am planning to burn a bootloader onto an Arduino Uno using a Uno as an ISP. The instructions here:  say to put a 10 mf capacitor between reset and ground. But they to not say which Uno to put the capacitor on. Am I correct that it should be on the Uno to be programmed and not the programmer?

Topic by JRV31   |  last reply

How to RESET an Arduino UNO?

Guys!            Can some one tell me how to RESET the Arduino UNO using a software code. The reason for this question would be that I am planning to place the Arduino inside a small box once my project is completed and working. However, I will need to RESET the board quite often. I am aware that there is a RESET button, but it will not be accessible. I want to put another push button outside and somehow manage to connect it to the Reset line on the board. Any help on this will be appreciated. Thanks in advance!

Question by kailash174   |  last reply

Arduino uno &Gsm modem

Can any body tell me that is there any difference btwn. Arduino gsm-shild  and normal gsm modem .?Do i have to code Arduino differently to send data when i'm using normal gsm modem ..?? and how can i connect Arduino-Uno to normal gsm modem..???

Topic by MeetR   |  last reply

ARDUINO UNO nested loops

Hi there. i'm using arduino uno and i found that the code below does not work. Seems like "if" do not work inside "if" statements. how do i solve this problem dear community. if(ButtonStateAUTO==HIGH) { while(1) { Serial.println("auto"); delay(1); if(ButtonStateON1==HIGH) //while(1) { Serial.println("autoON1"); delay(1);} } } else if(ButtonStateMAN==HIGH) { //lcd.clear(); while(1) { Serial.println("man"); delay(1); if(ButtonStateON2==HIGH) Serial.println("manuALon2"); delay(1); } }

Topic by lovetronic   |  last reply

Intel Galileo will not communicate with Uno?

Hello, I want to communicate with my arduino uno via serial on pins 0 and 1 of the Galieo and SoftwareSerial on Uno pins 10 and 11. I have checked the baud rate and all i get when i read the SoftwareSerial port is garbage. Does anybody know why this is happening? Thanks

Question by D5quar3   |  last reply

GSM900A and Arduino uno programimg?

Hi, I'm using arduino uno and gsm900a for sending sms and making call upto 10 numbers, i'm not able to send for all ten numbers one or three numbers only received,others? Please answer. thank you/.

Question by Anbuc7   |  last reply

Arduino UNO Code Problem

I want to get arduino code to sync computer time... Please Help Me...

Topic by Tech Works   |  last reply

2,4tft lcd to arduino uno

Hello guys , I'm making a gaming console for my school project with 2,4 TFT touchscreen and arduino UNO , i bought arduino uno and touchscreen LCD but without a shield , i searched on web how to connect them but i cant find a circut diagram for lcd without shield , can someone who know how to connect it make me a circuit diagram for it or just write which pin goes in which port on arduino , thanks , I'll attach picture of my LCD touchscreen

Topic by kikid112   |  last reply

Arduino Uno Relay circuit

I am currently involved in a project that requires me to run a fan heater through coding in an arduino. I have decided to use a relay to act as a switch, to maintain the time period of heater running. I am using a DOAT 5V 20mA relay. I was wondering if anyone could help me with the circuit needed using a n-p-n transistor to power it while maintaining switch function. I know a circuit similar to the one below is needed, but im not sure about the capacitor and resistance values needed for a 5v, 20mA relay.

Topic by RoshanC1   |  last reply

When i connect an Arduino Uno board it shows nothing.

Hey. I just bought an Arduino Uno board and it shows nothing at all. Changed cables but nothing is happening. Im using Windows 8.1. The 1st time i connected it, it just turned on some lights now theres nothing.

Question by smakoni   |  last reply

How to connect phone with arduino uno &make it call through arduino code?

Hello......I have an arduino uno and i want to use it to connect cell phone when signal from specified point is on the phone call or send sms . I also need to know the code thanx alot

Question by hamadabedo   |  last reply


Hi,    iam using the arduino uno in my project.The project is to display the temperature and humidity in lcd and ethernet and stored in the sd card in every 1 minute ,using the dht 22 sensor.But the lcd display is not working simultaneously with the sd .Hereby i am attaching the code.pls hlp me to trobleshoot the problem.

Topic by sruthys   |  last reply

problem with arduino?

I have some questions about Arduino Uno. I connect my board and within 5 minutes (no code is running or anything), the chip becomes hot. Plus, none of the IDE is recognizing my board. I'm always getting the error "avrdude: stk500_getsync(): not in sync: resp=0x00". Can someone help me with these issues? 

Question by sgupta95   |  last reply

arduino help

Im needing some help with a project that im working on. Im needing info on what parts I would need to use arduino uno to power a hair drier and small fans on a 12v dc power?  and I need some help wrighting the code if any one can help that would be sweet ? im using windows 7. thank you for your time.

Topic by traviscall   |  last reply

how to control small dc motors with arduino uno r3 with the connection of homade moter controller

How to control small dc motors by motor controller on arduino r3  and what is the better motor controller chip and how many small dc motors can u connect on an arduino uno r3

Question by alys5   |  last reply

Using Arduino Uno with mCar Program? Answered

Makeblock is a software packaged developed around the Me Orion, which is a board that is based off of Arduino, and according to their website, is cross compatible. However, they lack any information on pinouts between the two. I'd like to make the mCar project, but don't want to purchase the Me Orion. I have everything needed, including the stepper motors, stepper motor drivers, and an Arduino Uno. However, the car_robot firmware doesn't give pin numbers- instead, it has Port1 and Port2 listed under the included pins. How do these correlate to the Arduino Uno without having a shield? Which pins do I use on the Arduino? From what I have found, the connection that the first stepper driver would connect to on the Orion consists of 10, 11, GND, V-M,SDA, and SCL. What are the last three on an Arduino Uno? Same goes for the second, except 9 and 3 is listed. And for the lifting servo, is it really just pin2? Or another way of looking at it, is how would I figure out what pins are tied to Port1 and Port2 in the script?

Question by RocketPenguin   |  last reply

What is wrong with my Uno r3?

Please help.  I have 5 UNO R3 clones and I can't install them on my computer. When I plug them in two red LEDs light and the board comes up under Other Devices as a USB V2 device. I've tried every driver I can find, but none are recognized as suitable. I've tried 5 different boards, two computers Win 8.1 and Win 7. I've swapped cables and still nothing. I have a feeling it could be a lack of a bootloader on all the boards. How would I check if this is the case and how would I fix it? I have managed (easily) to install an Arduino Mega with no problems and I've managed to install many other devices so it's not a case of too dumb. Just a little dumb :-) Any help would be very much appreciated.      Stu

Topic by StuartB4   |  last reply

what are the arduino pins on the uno microprocessor?

Ok, i just finnished making and was wondering, what pins on the microprocessor match to which pins on the arduino? i was also wondering, how would you make a driver out of the processing sketch on the ible above marked N64_Controller? i want it to be a driver, not a program. any ideas?

Question by Krayzi99   |  last reply

Simple Quadcopter using Arduino Uno?

Hello guys I am making a quadcopter using Arduino uno. My first simple aim is to lift and hover the quadcopter.  To achieve this aim  I have connected the signal Wire of all the ESC's to arduino Pin 9 and giving throttle via node server using bluetooth module and johnny five library.  My quadcopter lifts from 2 sides (flips) and sometimes little bit from 3rd side also.  Can anyone suggest me anything ? The thing which I am doing giving equal throttle to all motor, Is it right ? or  should I give more throttle to clockwise and little less throttle to counter clock wise motors. I will be very thankful, if you guys help me to lift my quadcopter

Question by nishanksingla   |  last reply

Arduino Uno Solar Battery Charger ?

Hello everyone. Newbie here.  My project is to make an environmental monitoring system that will be battery powered and charged using solar energy, when the system is not in use. The components I am using are listed below for reference.  Parts List: 1. Solar Panel  2. Rechargeable 9V Battery 3. Uno Rev 3 4. SD Module 5. Grove Dust Sensor 6. Grove Temp & Humidity Sensor 7. Grove Light Sensor 8. ESP8266 Transceiver 9. Grove Air Quality Sensor All the components operate at 5v with the exception of the ESP8266 which is 3.3v. I have been looking at different methods of powering the system and noticed people using LiPo batteries. I'm aware that you shouldn't let there voltage drop too low and something about voltage regulators and boost converters that might be needed.  Based on my system can anyone recommend the best method of powering everything using batteries and charging it through solar energy.   I'm fairly new to the Arduino Eco system and this kind of work in general, so any help would be greatly appreciated. Thanks in advanced. 

Question by hymcode   |  last reply

Arduino (uno r3) not in sync, help? Answered

So I'm pretty new to arduino. Got myself an Uno rev3, and all was well for a couple of weeks. Now however, whenever I try to upload a sketch I get an error message telling me this: avrdude: stk500_getsync(): not in sync: resp=0x00 Googling this has not solved anything. I don't think there's anything messed up with the IDE, as I get this in both arduino 1.0.1 and 1.0.2, as well as Visual micro. I tried everything I could think of. Resetting the board did nothing, neither did re-installing drivers or rebooting. The serial bounce test showed no errors, and the Rx LED blinks when I try to upload.  (If you are unaware, the bounce test means connecting Rx to Tx and opening a serial monitor. Everything you send should then be bounced back.) I'm currently thinking bootloader issues, since resetting the board does not make the pin 13 LED blink.  So, does anyone know what to do here? ------------------------------------------------------ UPDATE: I am an idiot. This whole time, I had the atmega328 plugged in backwards. It works now.

Question by Tinker_Tom   |  last reply

Ardunio Uno Keypad Pin Memory

Hello everyone, I am having trouble making an Arduino code using an Ardunio Uno, and a 4x4 keypad. Quick background, I just started working at a school to help them out with CAD drawings, and they are working on a project.  The students have to make a "cabinet" that has doors or drawers or whatever they wanted.  the door has to lock with a solenoid, and be opened with a pin from a keypad.  The reason is the students will store Ipads in there to charge and so that nothing gets taken. They want the students to put their Ipad into one part of the cabinet, then close the door, lock the door, and put in a pin for that door.  then they want the student to be ale to put in their pin and their door opens.  This would allow each student to put in their own pin, They don't want pre programmed pins as the students that use the room changes over a lot. The biggest trouble so far is none of the teachers know how to make the Ardunio save a pin to memory, and then check the memory when a pin is put in.  So if anyone could help point me in the direction of how to do that, or help with the code hat would be great. Thanks, P.S. I'm a mechanical engineering tech student helping with CAD simply because I know it well enough.  and I don't know much programming.

Topic by werb123   |  last reply

Multiple Arduino Uno I/O ports driving relay Answered

Understand that the Arduino Uno can output a maximum of 40mA each from its IO port. I used 2 IO ports each (4 in total for switching) to drive a 80mA relay. In this case, the Arduino Uno is powered by USB, which draws up to 500mA. It worked and it was left to switch for a few minutes on pulsed 10 seconds interval. However, the Uno board heats up to around 50-55 degrees centigrade. Will this damage the board?

Question by Fiorano   |  last reply

Which arduino borad to buy?

Http:// Hello! And i am interested in starting arduino! But i am not familiar with the hardware spec of arduino boards. I have some electronics and programming bg as an physics student. I read the above tutorial, the led matrix looks like a easy/cool starter project. However, i have a question, For 4 by 4 matrix, it need 4 outputs and 4 grounds. With 14 i/o pins on an arduino uno (0to13), is 7 by 7 the maximum for upscaling this design without multiplexing? Or if i can get a "shield" that add more pins to the uno? Should i just get a arduino mega with 54 I/O pins? Since it is not that expensive, Is the tutorial compatible with a mega? Actually my target build is two 15 by 15 matrix displaying identical image. Can i rig up two identical led matrix, connect both in parallel to the same board? Thank you in advance! for your replies!!

Topic by mchau2   |  last reply

How to sense motion in sleep using accelerometer and Arduino Duemilanove ? Answered

I want to make an alarm clock that will monitor the motion of a person in sleep, and will trigger when the person is in motion. i have the code but i need the hardware and schematic.... the code is as follows:

Question by thakur900   |  last reply

Arduino programming help: Do two things at once!

So I'm making a new project but I ran up into a little problem with the code. So this is what I want: Arduino check to see if A0 is HIGH, If so, turn on LED for 5 minutes. If, during any period within the 5 minutes, if pin A0 goes HIGH again, then start the 5 minutes all over again.  So basically every time pin A0 is HIGH no matter when always start a new 5 min timer. This is what I had. . . void loop() {     pirstate = digitalRead(pir);     if (pirstate == HIGH)   {     digitalWrite(LED, HIGH);     digitalWrite(relay, HIGH);     delay(pulse);   }    else   {     digitalWrite(LED, LOW);     digitalWrite(relay, LOW);   }   } The only problem with the above code is that it doesn't do anything while waiting the 'pulse' time. I need it to be able to within 'pulse' time check again to see if the pin is HIGH, and if it is, start all over again with 'pulse' seconds. Thanks guys! Your help is invaluable!

Topic by HavocRC   |  last reply

Looking for someone in the UK to assemble Arduino UNOs and Nanos to my design.

Looking for someone in the UK to assemble Arduino UNOs and Nanos to my design.All relatively simple but my eyes are not as good as they used to be.I can program them OK I just need them assembled. Happy to pay if we can agree a sensible price.

Topic by IanB91   |  last reply

Arduino Boards Which is the best?

Arduino (uno <> duemilanove)  my focus will be on robotics projects as well as LED 

Question by Avadhut.Deshmukh   |  last reply

Arduino and DHT11

I am trying to make my ArduCAM work with my DHT11 sensor.I have done it successfully with Arduino UNO and want to do the same with ArduCAM. So far it is not working. Can't retrieve the temperature nor the humidity. The thing is that I thought as ArduCAM is based on UNO R3 it would work. Is it possible? Thanks

Question by ghoul226   |  last reply

Will this stuff work with the new Arduino?

Hello guys! I already have the Arduino Rev3 but I want to know if all these components I want to buy will work with the new one. They are in a kit for the old board, but I hope they work with the new one. Please tell me if they will work or not. Thanks!

Topic by HavocRC   |  last reply

Which Arduino should I buy?

Hello community, I had a question- which Arduino is the best? I want get get an Arduino with my birthday money and I want to know which board I can get the most bang for the buck.  If somebody could point out which Arduino board is best that would be awesome! Thanks, Oh, BTW, my budget is around 75 dollars

Topic by HavocRC   |  last reply

HELP - Arduino - "Expected constructor, destructor, or type conversion before '(' token"

I have only just received this Arduino UNO and am trying to teach myself the language. I thought it wouldn't be that bad as I am already familiar with python, however, I was getting loads of errors (most of which I have managed to solve from searching through forums) and have landed on this one. I get this error - "exit status 1 - expected constructor, destructor, or type conversion before '(' token"This is my ledPin = 0; //declares all different pins for different segments of displayint ledPin1 = 1; int ledPin2 = 2; int ledPin3 = 3; int ledPin4 = 4; int ledPin5 = 5; int ledPin6 = 6; int ledPin7 = 7;int inPin = 5; //declares analogRead pinint alphaValue = analogRead(inPin); map(alphaValue, 1, 1023, 1, 4) //maps 1-1023 to 1-4void setup() { // put your setup code here, to run once: pinMode(0, OUTPUT); //declares pin types pinMode(1, OUTPUT); pinMode(2, OUTPUT); pinMode(3, OUTPUT); pinMode(4, OUTPUT); pinMode(5, OUTPUT); pinMode(6, OUTPUT); pinMode(7, OUTPUT); pinMode(5, INPUT); #define low digitalWrite(ledPin, LOW); //defines 'low' digitalWrite(ledPin1, LOW); digitalWrite(ledPin2, LOW); digitalWrite(ledPin3, LOW); digitalWrite(ledPin4, LOW); digitalWrite(ledPin5, LOW); digitalWrite(ledPin6, LOW); digitalWrite(ledPin7, LOW); }void loop() { // put your main code here, to run repeatedly: if(alphaValue == 1){ low digitalWrite(ledPin, HIGH); digitalWrite(ledPin1, HIGH); digitalWrite(ledPin7, HIGH); digitalWrite(ledPin2, HIGH); digitalWrite(ledPin5, HIGH); digitalWrite(ledPin6, HIGH); } if (alphaValue == 2){ low digitalWrite(ledPin1, HIGH); digitalWrite(ledPin5, HIGH); digitalWrite(ledPin4, HIGH); digitalWrite(ledPin6, HIGH); digitalWrite(ledPin2, HIGH); } if(alphaValue == 3){ low digitalWrite(ledPin, HIGH); digitalWrite(ledPin1, HIGH); digitalWrite(ledPin5, HIGH); digitalWrite(ledPin4, HIGH); } if(alphaValue == 4){ low digitalWrite(ledPin, HIGH); digitalWrite(ledPin1, HIGH); digitalWrite(ledPin5, HIGH); digitalWrite(ledPin4, HIGH); digitalWrite(ledPin6, HIGH); digitalWrite(ledPin7, HIGH); digitalWrite(ledPin3, HIGH); } }

Topic by LOU_DEW747   |  last reply

Need help with Arduino. Xbees won't connect when I upload my code?

I am working on a RC Gripper lifter that works with 2 Servos and 2 DC motors. For wireless control I am using a Series 1 configured Xbee. Now the problem is that the Xbees don't connect when I upload the code. They do connect if I upload some other small code. Here's the Sender Code int potGripper = 1;   int potLifter = 2;   //int oldGripper = 0;   int newGripper = 0;   //int oldLifter = 0;   int newLifter = 0;   int midPin = 2;   int leftPin = 3;   int newGear =0;   int oldGear=1; void setup() {   Serial.begin(9600); pinMode(midPin, INPUT); pinMode(leftPin, INPUT); pinMode(potGripper, INPUT); pinMode(potLifter, INPUT); } void loop() {   if ( digitalRead(midPin) == LOW)   {      oldGear = 1;   }   else if ( digitalRead(leftPin) == LOW)   {       oldGear = 2;   }     int oldGripper = analogRead(potGripper);   int oldLifter = analogRead(potLifter);   int Grippervalue = map(oldGripper,0,1023,0,9);   int Liftervalue = map(oldLifter,0,1023,0,9);   if(newGripper != Grippervalue)   {     Serial.println('!');     Serial.println(Grippervalue);     Serial.println('#');     newGripper = Grippervalue;   }   else if(newLifter != Liftervalue)   {     Serial.println('@');     Serial.println(Liftervalue);     Serial.println('#');     newLifter = Liftervalue;   }   else if( newGear != oldGear)   {     Serial.println(';');     Serial.println(oldGear);     Serial.println('#');     newGear = oldGear;   }   delay(500); } And here's the receiver code- #include //If serial dsn't work as expected, add  while(Serial.available()>0); at end of each loop! int gripperPin = 9; int lifterPin = 10; int rpmData = 0; int motorLeft, motorRight, gripperData, lifterData, angle, flag; Servo myGripper; Servo myLifter; void setup() {   Serial.begin(9600);   myGripper.attach(gripperPin);   myLifter.attach(lifterPin);   delay(500); } void loop() {   while( Serial.available() == 0);   int data = - '0'; if (data >=0)   {     if(data == ';') // For setting the motor RPM     {       rpmData= - '0';       if (rpmData == 0)       {        motorLeft= 300;        motorRight= 250;       }       else if (rpmData == 1)       {         motorLeft= 200;         motorRight= 150;       }     }     if (data == '!') // For the Gripper     {       gripperData = - '0';       angle= map(gripperData, 0, 9, 0, 80);       myGripper.write(angle);      }     if (data == '@') // For the Lifter     {       lifterData = - '0';       angle= map(lifterData, 0, 9, 0, 160);       myLifter.write(angle);     }     //if (data == '%') // For the Buttons      if (data == '#') // For marking end of Serial Data      {       flag = 0;      }      }     } My main aim is to send a value between 0-9 from one arduino to another so that I can map it on the other arduino from 0-160 and 0-80 (I am using 2 servos). I have used a symbol to differentiate the values from each other so that the correct value reaches the desired servo/motor. Please help me figure out my mistake..

Question by ReshamP   |  last reply

Shield:FAIL problem in ESP8266-01 with Arduino UNO

I have been working on a Security System project wherein I should get an email if the PIR sensor detects any human presence. I have used an Arduino UNO, ESP8266-01 WiFi module and a PIR sensor. Power supply: Arduino is powered through the USB connection of desktop and ESP8266-01 is powered through the 3.3V pin of Arduino UNO and I have not faced any problem with that 3.3V connection of Arduino. The connection between Arduino UNO and ESP8266-01 are as follows: Arduino UNO ESP8266-01 Rx  Rx Tx  Tx 3.3V  CH_PD & VCC GND  GND   GPIO0 and GPIO2 left open. After successfully uploading the 'BareMinimum' code as found in 'File>Examples>Basics' of Arduino IDE, the ESP8266 is able to communicate correctly i.e. connecting to a wifi network or serving as an access point via SERIAL MONITOR.The ESP8266-01 displays '0018000902-AI03' as the firware version when I type AT+GMR in the serial monitor of Arduino IDE v1.6.8 Then I created an account on and used the 'SendEmail' choreo as found under 'Google>Gmail>SendEmail'. I selected the 'Arduino' option in one tab and 'Arduino Wifi' option in another tab.I then entered the required details including the 'App specific password' and I was able to successfully run the choreo. Problem: I was able to successfully upload the code  to my Arduino UNO that was generated by Temboo. But after uploading the code, when I'm opening my SERIAL MONITOR window from Arduino IDE a message "Shield:FAIL" is being displayed. I'm not able to communicate with the ESP8266 any further. But if I upload the BareMinimum code again, then ESP8266 works normally. I'm a newbie and dont know much about the programming of Arduino though some basics of C are clear.Please if anyone can help me with this, I would be very grateful. The code has been attached.

Topic by JigarF   |  last reply

What are some compatible displays for Arduino Uno?

I'm gonna create a little half scale Arcade machine (out of cardboard if I can) just for fun so I can know how to code the screen but I don't know what displays can work for the Arduino Uno and I've found one at Sparkfun which is the touch one for it but that's too Expensive! So what are some displays that the Arudino Uno can use so I can program it to display Atari's Arcade games on it?

Question by SuperScourge   |  last reply

serial communication between arduino uno and nano

I want to build a prop/robot based of the persanality cores in portal/portal2 i want to make one of the ability is the persinality core to control a outside object via serial communications between arduinos i want to do this with a nano arduino and a arduino uno is this posible i would be really helpful 

Question by noobduino   |  last reply

Connect USB HP printer to Arduino UNO Answered

Hi, i want to connect a USB printer to an arduino to control it, i know that i can connect a Printer by using the Parallel cable, but my printer only works with usb. Any ideas????

Question by gastonbr100   |  last reply

arduino uno R3 + ethernet shield as webserver

I am trying to load a webpage stored on SD card on the ethernet shield. I loaded the sketch webserver avalable in the library. THe output that i got on the serial monitor was server is at but i was unable to open the webpage any suggestions?? thank you

Topic by kavyamc   |  last reply

Arduino 1.8.5 update, error on loading to Uno

Hi. I have just updated to 1.8.5 from 1.0.5 on MAC and get error message: "Ileagal files found". I have not uninstaled old version yet as that still works. Is the old version the problem now? Also the new version will not stay "unzipped" on the dock.Thanks in advance for your help.

Question by CornishKiwi 

How to program atmega32A using arduino uno??

I bought a 40pin atmel's Atmega32A-PU and i was unaware that it needs a different programmer rather than using arduino. I can't buy another programmer just to program that ic. I have arduino uno board which has atmeha328p and i have used it to program another atmega328p. But I don't know how to program a 40 pin ic such as atmega32A using arduino board and arduino ide. I tried this tutorial on this link but nothing happened... It was successful only upto burning the bootloader. What to do next???

Question by akki5230   |  last reply

Arduino Uno + 6 servos (Power Supply) ?

I need help on my robotic arm project. The question is i wanna use a seperate power supply for my arduino uno and servos. This means, i'll have two different power supply. Is that possible? What would you recommend for the solution? After done some reading, i  found 9v batt is enough for Arduino only. But for my servos? I dont know what to use, 4 x AA batt? if each servos take 2 A x 6 = 12 A (so what would i do with this)? Really need ur help! Thanks

Question by naqibzainudin   |  last reply

how to detect sensor position with arduino uno

Hi Guys recently i started use arduino UNO and with simple programs to read from analogue pins wasn't hard. now i'm facing a challenge, as i have a sensor mat 16x16 (rows and columns) i want to read 4 rows and 4 columns i'm trying to use the analogue pins as input for rows and digital pins from (8 to 11) as output i want the program to detect the position of the sensing area such as (row1 colum 4, for example) and give me the number that measured over this area. my code is very bad but i'm trying, specially my background wasn't programming or science. any ideas will be great.

Topic by Najeebgh   |  last reply