Instructables: question - arduino Mon, 29 Aug 2016 14:46:05 PDT BLOX v1.01 need help : How to extract fingerprint image from Waveshare uart fingerprint using arduino ? AhmadQ8
By: AhmadQ8

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Sun, 28 Aug 2016 12:56:38 PDT
how to find t pin and ground on headset of force trainer toy? milomir i can not find t pin and ground on head set board of force trainer toy,can somebody help me?
By: milomir

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Wed, 24 Aug 2016 09:27:10 PDT
arduino error. exit status 1 expected unqualified-id before '<' token arduino ? paul the maker i'm tring to make a led light bar random number generator thing but my code is sadly not working and i do not nkow why pleae help here is the error message: exit status 1 expected unqualified-id before ' here is the code int LED0 = 2;int LED1 = 3; int LED2 = 4; int LED3 = 5; int LED4 = 6; int LED...
By: paul the maker

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Mon, 22 Aug 2016 01:11:32 PDT
Led strobe light? Chamburn Hello everyone, I came across a video on youtube where I found a light on a truck but don't know what it is called maybe strobe but I am not sure about this.  My ideas would be to use an IC 555 or use arduino to control the lights to achieve the same effects that the light is on the top of the red t...
By: Chamburn

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Sun, 21 Aug 2016 06:37:23 PDT
What is the maximum data of an mms that gsm can send? AmiruddinL I used SIM900A GSM/GPRS Module to send mms in my project. I want to know what is the maximum data that this gsm can send? And is there any other way to send more than the maximum data?
By: AmiruddinL

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Thu, 18 Aug 2016 11:26:07 PDT
Maze solving arduino code problem tamzidur I wanna make a maze solving line follower bot..  So I've got idea about algorithm and using my previous simple line follower bot as hardware. But the problem is about understanding coding part.. I have downloaded several code also from instructable but as they don't provide sufficient comment it see...
By: tamzidur

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Mon, 15 Aug 2016 23:16:19 PDT
Can gsm send mms? how to do it? what are the coding? AmiruddinL I need urgent help. I am doing my final year project.I want a camera capture image then save inside SD card breakout board. Then i want to send the image using gsm. Can i do it? then how? If can no, then how can i do something like this? what type of camera should i used? P.S sorry for bad english.
By: AmiruddinL

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Sun, 14 Aug 2016 14:36:55 PDT
arduino uno detection HassenA1 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 w...
By: HassenA1

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Wed, 10 Aug 2016 16:49:42 PDT
Need help with changing arduino code for more servos Orange robot This code makes a continuous rotation servo motor turn on and run until you let go of the button. I need to change this sketch so that there are 3 buttons, instead of 1, and if I press 1, a continuous rotation servo would turn for each button until I let go of the button. #include Servo myServo; ...
By: Orange robot

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Tue, 9 Aug 2016 12:07:10 PDT
Digital Taste Interface? headslant Hello Instructables. I had a question for my newest project. I am looking to make a Digital taste interface with Arduino like this The video says that the current needs to be altered between the range of 10 and 140 microamps. I have bought a 10k and 100...
By: headslant

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Thu, 4 Aug 2016 06:42:15 PDT
Arduino D1 temperature code is not working for me. ealemanypr Hi,  I'm working on a temperature( DS18B20) project with the model D1 of Arduino and I will like to connected to the internet via Blynk . I was able to configure the WiFi and the blink project. But when I try to use this code the application of Blynk say that I don't have connection with the board. ...
By: ealemanypr

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Fri, 29 Jul 2016 18:01:41 PDT
how is code transferred from an arduino programmer to a stand alone chip on a circuit board? afridave Morning all I am relatively new to arduino but have played around with LEDS and motors.  I wish to make a simple stand alone flashing light arrangement that will function as a stand alone.   how do I get the code into this circuit Thank you staA
By: afridave

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Thu, 28 Jul 2016 23:32:22 PDT
Arduino: using push button, Increase/decrease Delay time? nageshsp Arduino: Is it possible to Increase/Decrease delay time using push button?
By: nageshsp

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Sat, 16 Jul 2016 08:30:13 PDT
How can i separate mac & store memory in arduino ''+INQ:1D:FE:720479,7A020C,7FFF" nazmulmilon I want to make Door lock in a different way.please anybody suggest me,when i come back in my room, it is self unlock the door lock, use arduino & HC 05,my Bluetooth run at command mode ,at first collect the last pair Bluetooth mac and it is compared with +inq mac address ,if my phone mac is availabl...
By: nazmulmilon

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Wed, 13 Jul 2016 15:00:13 PDT
Arduino code not working. Super basic but I'm stuck. Help is appreciated. harry88      So I have wrote an Arduino code for a simple Aquarium dosing pump controlled by Android and Arduino. I have a button on pin 8 and I want the button to just be a physical trigger for the dosing for calibration purposes. for whatever reason i cant seem to figure out how to do this and help would ...
By: harry88

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Tue, 12 Jul 2016 21:02:19 PDT
Creating heart beat from mic input? RamalN Hai guys.. I'm doing a project to get the heart beat through a mic... So I connected the top end of a stethoscope to a tube and the other on of the tube to mic (seal tight). The mic is an Arduino mic module. Using anlogread function I'm getting an input with lots of numbers and when plugged into to ...
By: RamalN

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Fri, 1 Jul 2016 00:22:36 PDT
ARDUINO OSCILLOSCOPE? ranjana_1 Hey there, I have been working on a recent project to build an Arduino Oscilloscope interfaced with a 4X4 keypad membrane with Nokia 5110 LCD display.I have successful individual code fragments/portions which 1)Generate waves interfaced with the keyboard  2)Display the same on the Nokia LCD 5110 i ...
By: ranjana_1

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Wed, 29 Jun 2016 04:23:49 PDT
ARDUINO TIMING HELP? Lakshya1503 Guys can you help me out with some code on arduino timing.I want my Arduino Due to perform a set operation(say blinking an LED) for user defined time ie. It should ask the user to enter the time he/she wishes to run the thing.Thanx..
By: Lakshya1503

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Mon, 27 Jun 2016 23:20:40 PDT
Cheap way to make an arduino play multiple sounds (MP3/WAV)? DoctorWoo First off, I know that doing this straight forward is not possible. The are a few ways I think I can do this. The main one I'm looking at is to have a MP3/WAV board hooked up to a speaker. I'll have two setups, one that is set to have three sounds (start, stop, fire, and only one of those three sou...
By: DoctorWoo

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Fri, 24 Jun 2016 15:40:44 PDT
Cheapest Attiny85? Soumojit Hi, I am planing to buy a Attiny85 to make a led pov display. I live in India So can you tell me where I can Find cheapest Attiny85with free delivery in Internet??
By: Soumojit

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Thu, 23 Jun 2016 10:09:33 PDT
How can I change an "if" in an arduino code ? GellertK So I have this code from James Hutton and what I want to do is to change the "rainbowCycle" to something else, like "NeoPixel_Cylon_Scrolling_Eye". Is it possible ? Thank you very much !
By: GellertK

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Sun, 19 Jun 2016 10:31:02 PDT
I want to make and old school dial water meter using arduino and flow meter? ashishngupta i need help making a old school dial meter like the ones used in electricity or auto richshaws. i want to flow water through a flowmeter and record data from arduino....
By: ashishngupta

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Sun, 19 Jun 2016 00:35:43 PDT
Is there a way to change the value of a variable and keep it afterwards? Arduino rojascan Hello everyone, I don't really know if this is possible, I am using processing, arduino and a force sensitive resistor to control a servo and I want to change the value of a variable and then if I reset the arduino, it will kept the new value. Is there anyway to do this? This is the part of my cod...
By: rojascan

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Fri, 17 Jun 2016 11:40:03 PDT
Hc-05 and Arduino connection dimitrakis1992 Hello to everyone.I have make a bleutooth robot which i can control it via android(tablet) and i have a problem with the code.I want from the robot to stop when connection lost or bluetooth disconnected.Now when the connection lost the robot go ahead and falls on the objects.How to add this line on ...
By: dimitrakis1992

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Thu, 16 Jun 2016 14:20:43 PDT
how do I connect the Wemos D1 r2 to an L298n motor driver to control 2 DC mootors? huguens Hi , I'm new and I'm looking for help to see how we can wire a Wemos d1 r2 and L298n motor driver. My objective is to control 2 DC motors with Blynk. I will really appreciate anyone's answer or sketch or link to help me out. thanks
By: huguens

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Wed, 15 Jun 2016 11:49:56 PDT
arduno Uno connect to laptop USB OK,connect to external power not OK? gada888 Hi,All I am experiencing a headache now.I connected arduino UNO and a serial relay board,then i uploaded my sketch to it,the problem is once i plug it into laptop.the project works,but once i use a external power,say,12V 1A,or 5v 1A.or lipo batteries(5v1A and 12V1A)to power jack of UNO,it won't beh...
By: gada888

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Fri, 10 Jun 2016 23:13:12 PDT
How to over- power an led with arduino ? Jack Vu Is there a way to draw max (or even more than max) current to a LED with arduino as the controller ?  The LED is a high power LED that use a 12V source. I used a power MOSFET IRF620 as the driver. My application is that I flash the LED on and off in a very short amount of time (strobe light). (the ...
By: Jack Vu

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Mon, 6 Jun 2016 13:23:04 PDT
Why wont my 2 channel relay board allow power through the output? Jamie Toeg I have a 2 channel relay board connected to an arduino nano and when i send a low signal to it i get the light on the relay board but nothing goes through the common and normally closed pin. I have the relay running on 9v instead of 5v. would this be a problem? when I test it with my multimeter it m...
By: Jamie Toeg

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Thu, 2 Jun 2016 10:07:00 PDT
Arduino 3 button light control BlueSuneLIght A friend asked me to build him a controller for a 12v Arrow board (roadwork sign) he got second hand (original controller is completely missing) So after asking him what he wanted it to do, it needs 4 modes: 1: Off (that is easy) 2: Point left 3: Point right 4: Hazard mode (top and bottom of the ar...
By: BlueSuneLIght

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Wed, 1 Jun 2016 09:12:07 PDT
Is there a quiz program to answer with yes or no that is compatible with a arduino uno. nassinho I have a question about a project for school with a arduino uno. I have one arduino uno and 4 servo motors and 2 LCD displays, and some jumpwires (male and female) What i want to create is a race course made out of wood and i want to use the motors as levers. You can play this game with 2 players a...
By: nassinho

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Tue, 24 May 2016 05:12:21 PDT
Can I create a quadrocopter RC transmitter using an Arduino? TylerT35 I recently started playing with a quadrocopter. I love it, but I am not a fan of the traditional RC transmitters. I believe that they were designed for older RC airplanes and I think the design could be improved upon. I have also recently started experimenting with Arduino. I bought a USB shield and...
By: TylerT35

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Mon, 23 May 2016 20:26:02 PDT
Why my instructable had entered a contest but I can not see it? VUNAMANH8112

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Mon, 16 May 2016 17:35:08 PDT
Create standstill effect with LED from hall effect sensor ? Jack Vu Hi everyone, A little bit info of what I'm working on. I am trying to create a standstill effect of the spokes of the car rim. I attached a hall effect sensor and a magnet to inside of the rim . I have tried 2 different approaches : ( code for each method are also attached)              1. use the...
By: Jack Vu

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Wed, 11 May 2016 10:22:32 PDT
i want my motors speed to be constant with the temperature via an equation, its a school project. help!? Fthol1 my project is to make a fan that will be constant (speed) with the temperature of the surrounding, display the temperature on an lcd screen and have a servo tilt it up and down. I have made my code for now and it seems correct, i think my problem is with the clarity of my code or the power. lcd + mo...
By: Fthol1

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Wed, 11 May 2016 06:03:04 PDT
Super Easy Arduino Question? Mpc1055 Hey all, below is schematic for a really simple water level sensor. I want to hook this up to my Arduino so that Arduino will know when each LED is ether HIGH or LOW. My question is where at what point in the schematic do I hook up the digital read pins?   
By: Mpc1055

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Wed, 11 May 2016 05:22:04 PDT
Determine the distance between a magnet and a hall effect sensor? Jack Vu Hi guys, As the title say, I am looking for a way to determine / measure the distance between the magnet and the hall effect sensor. What I want to archive is that the trigger (or the switch to LED) only activate if the magnet within ~0.5 cm - 0.3 cm . Any more than that, it wont do anything. My cod...
By: Jack Vu

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Thu, 5 May 2016 21:42:53 PDT
Powering a 16x2 LCD Screen? Mpc1055 Hey all I am relatively new to the Arduino platform and learning as I go. I have a 16x2 LCD screen that I am trying to learn how to use. I hooked my positive lead to pin 2 and the Ground to pin1 and nothing lit up. I then hooked a potentiometer up to pin 3 to try and adjust the contrast still nothin...
By: Mpc1055

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Thu, 5 May 2016 08:21:35 PDT
how to control DC motor go forward, reverse and stop with IR sensor? 승주권 hello to use arduino, i am trying to control DC motor via IR sensor, but  i have no idea how to coding the source put in the conditions the conditions are under parts - 1. arduino Mega 2. IR sensor 3. DC motor 4. L298n(motor driver) Current state  = DC motor STOP / IR sensor ON --- CONDITIONS...
By: 승주권

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Tue, 3 May 2016 12:37:05 PDT
how can i do submit button when i click it i go to URL example in arduino ethernet shield code?? ahmad_pika91
By: ahmad_pika91

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Sat, 30 Apr 2016 09:51:01 PDT
how can i protect my arduino ethernet shield code with password, then who enter the ip address is requested for passwrd? ahmad_pika91
By: ahmad_pika91

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Sat, 30 Apr 2016 09:49:11 PDT
Need help to make the stepper motor rotate in forward and reverse direction using limit switch? MELVINJ5 This is the code I used to forward the stepper for 360 degree,reverse the motor for 360 degree without using the switch. I need help to make the motor rotate in forward direction for 180 degree only after we click a limit switch and when we click the switch again,the motor have to rotate in reverse ...

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Sat, 30 Apr 2016 06:00:07 PDT
making an LED blink? Gaudnarok so im doing a school project, and i can't figure out this circuit that my teacher recommended me use. can someone explain it to me? i am trying to make the circuit on a bread crumb board (i think they are called that) and i am not sure what i am supposed to do. i am going to use a 555 timer.
By: Gaudnarok

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Fri, 29 Apr 2016 03:45:20 PDT
arduino wifi shield code what is wrong? why i cant turn on and off the led? ahmad_pika91 #include #include IPAddress ip(192, 168, 0, 120); char ssid[] = "TP-LINK_7035CE";     //  your network SSID (name) char pass[] = "(sabra*123)";        // your network password WiFiServer server(80);     // create a server at port 80 String readString;         // stores the HTTP request ///////...
By: ahmad_pika91

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Wed, 27 Apr 2016 00:42:32 PDT
How can I make my arduino communicate with a Windows 10 computer with a C application? IsaacPierce Hi I was hoping someone could help me with this. I am very new to the C programming language and I am trying to write a  simple program with a button that when clicked sends my arduino a "1" so that my arduino knows to send me some sensor readings. My arduino is on COM5. if you know anything about t...
By: IsaacPierce

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Tue, 26 Apr 2016 15:14:09 PDT
Unable to retrieve Rfid variable. HiteshP16 I am unable to retrieve string (RFID) from Arduino connected to Android app through Bluetooth . Arduino code #include #include #include #define SS_PIN 10 #define RST_PIN 9 char command; String string; MFRC522 rfid(SS_PIN, RST_PIN); // Instance of the class MFRC522::MIFARE_Key key; byte nui...
By: HiteshP16

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Wed, 20 Apr 2016 12:18:30 PDT
Turn multiple LEDs on when motion is detected? xMisaaaki Hi, I'm working on a code where the situation is "if motion sensor reads movement, turn one led on'. This has to happen three times. When the motion sensor read 3 times a movement, the third and las led will turn on, which activates the servo motor to move. Right now I'm stuck at some points in the...
By: xMisaaaki

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Mon, 18 Apr 2016 06:42:25 PDT
Arduino Code for LEDs AlexH155 I am trying to get it to work so one button turns on and off the lights and then another button that switches one set of lights on then when pressed turns those off and puts on another set on. Basically one set of yellow lights on then when the button is pressed they turn off and the red lights go o...
By: AlexH155

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Sat, 16 Apr 2016 12:57:29 PDT
3D printing stand alone heated bed controller with Arduino? ad5000 So I saw a video today with the 3D printing nerd and he showcased his gmax 3D printer with and a new heated bed, and it had a seprate heated bed controller. The video here in case you want to view it, and gcreates website for the heated bed itself,
By: ad5000

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Wed, 13 Apr 2016 15:08:05 PDT
How do I get RPi flask server to control Arduino over wifi? ThothLoki I have a RPi web server running flask and a wifi enabled Arduino in my garage to monitor and control various items. I need a way to control the Arduino from the RPi-hosted web page. I am just stumped at how to do this over ethernet/wifi/TCP/IP. Any suggestions and help is greatly appreciated!
By: ThothLoki

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Mon, 11 Apr 2016 21:02:55 PDT
Bluetooth, RGB sensor and Android app CourageQ This code is supposed to convert information from a color sensor and display what ever color is shown to the sensor as RGB values on the android app.  How can one incorporate bluetooth functionality to the following code?  Any help will be more than greatly appreciated. Even a donation  This is the ...
By: CourageQ

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Sat, 9 Apr 2016 11:04:43 PDT