Instructables: question - arduino Sat, 3 Dec 2016 07:49:45 PST BLOX v1.01 How arduino shows output on Serial Monitor? Rajkumar2506 Because inorder to display output of any microcontroller in Computer we have to Use MAX232 interface. Microcontroller uses TTL(Transistor Transistor Logic) and Computer Uses RS logic. Max 232 converts TTL into RS Logic so that the output of microcontroller will be displayed in computer. But there is...
By: Rajkumar2506

Continue Reading »]]>
Wed, 30 Nov 2016 17:27:43 PST
How to make a piezo sensor gradually light up an LED strip by tapping on the sensor repeatedly? ejbarr77 Hi there, I want to be able to gradually light up an LED strip by tapping on a piezo sensor trigger drum repeatedly. The aim is to have 2 separate LED strips, and a sensor for each, as it will be a game to see who can light their LED strip the whole way up the first. I have a 1m WS2812B 60 LED RGB L...
By: ejbarr77

Continue Reading »]]>
Wed, 23 Nov 2016 10:09:53 PST
Having problems with Arduino code for Self Balancing Robot DanishA22 Whenever I try to Compile this code arduino gives me this error E:\Balance Bot\BalanceBot2_PID_Control\BalanceBot2_PID_Control.ino: In function 'void setup()': BalanceBot2_PID_Control:38: error: 'cl...
By: DanishA22

Continue Reading »]]>
Sat, 12 Nov 2016 11:24:54 PST
How do I connect 3 x SainSmart 16-Channel Relay Module to an arduino mega board? GabrielC191 I have seen several posts regarding relay modules and arduino, but none specific about connecting this configuration.  I want to control 48 light bulbs with an arduino MEGA 2560 board. Can anyone help me with the requirements? I mean, I need to know whether I can connect those 3 relays modules (16 ...
By: GabrielC191

Continue Reading »]]>
Sat, 12 Nov 2016 07:13:34 PST
What read and write sequence should I be using to do more than cycle through a relay matrix. rccchappell I want to enter two values and those two relays to toggle 
By: rccchappell

Continue Reading »]]>
Thu, 10 Nov 2016 08:17:42 PST
which one is better nano aurdino or transistor? lachuviswan i am making maze rover (line follower) for the 1st time & i dont  know anything plz help me 
By: lachuviswan

Continue Reading »]]>
Wed, 9 Nov 2016 07:42:22 PST
My HID "Shield" doesen't work :(? Vincenzopaolo FlameE I follow this video: but with the same steps it doesen't work In windows 10 it doesen't works...device manager give me this error: Windows has stopped this device because it has reported problems. (Code 43) A request for the USB device descriptor failed. ...
By: Vincenzopaolo FlameE

Continue Reading »]]>
Tue, 8 Nov 2016 11:20:41 PST
Need coding to handle multiple relays with multiple touch sensor (TTP223), IR remote and from web for nodemcu ESP12E? KrishnaV35 Hey friends! Can anyone help me in designing a switch board which can be operated with touch sensors (TTP223), IR Remote and also with web application (like android / ios app) or with http:// . Coding for the same is my basic requirement. Basically i am looking for the coding. The things which i am ...
By: KrishnaV35

Continue Reading »]]>
Sat, 5 Nov 2016 07:26:06 PDT
how to run dc motor using keypad? AndrahyzertekosterA this is my code, i can't read the keypad input and turn it into pwm value ranging 0-255 #include const byte numRows= 4; //number of rows on the keypad const byte numCols= 3; //number of columns on the keypad //keymap defines the key pressed according to the row and columns just as appears on th...
By: AndrahyzertekosterA

Continue Reading »]]>
Fri, 4 Nov 2016 05:29:02 PDT
Analog and Digital inputs over serial? mvan h1 good day, question i am building a controller for my robot and i need to send the inputs(analog/digital) by xbee to my robot. now i am not good with programming i get stuck with the first line.... i want to know how i can program it to send it values over serial from xbee tot xbee on robot i didn...
By: mvan h1

Continue Reading »]]>
Mon, 24 Oct 2016 04:10:07 PDT
Arduino score board code question spikepickstock hi all. Ive been trying to work this out for a week and I'm guessing its a simple answer. Im building a score board, just LED modules (lights) instead of a 7 segment display There are two buttons, one for when each player scores a point. The led will work similar to a chaser but manually, each time ...
By: spikepickstock

Continue Reading »]]>
Fri, 21 Oct 2016 03:32:29 PDT
Arduino LED matrix scoreboard with buttons code? AntonE8 The project I want to make is an scoreboard for my Airhockey table that counts score with arcade buttons. I found some examples but have not anything that is exactly like I want to do. What I have bought is: Arduino Uno starter kit with all basic stuff and three 8x8 LED Matrix with MAX7219 drive. I ...
By: AntonE8

Continue Reading »]]>
Thu, 20 Oct 2016 13:51:20 PDT
Arduino WX code help for Weather Underground data upload? rwcwx Hello- I tried to recreate this WiFi Weather Station project using most of the same parts except for the Arduino WiFi101 shield.  I am having a problem with the data only being uploaded once.  The code tries again, but it seems the connection to WU fails after the first time.  I have to hit the res...
By: rwcwx

Continue Reading »]]>
Sat, 15 Oct 2016 10:01:59 PDT
How do you connect and code a servo controller module (8ch) with Arduino Uno? Fernando T Hello Everybody! hope everything is well... I want to start using a new servo controller module (8ch) which i recently bought, i tried to research how to use them but i could not find anything that went into enough depth or explanation of how to use it. What i'm saying is i don't know how to use or...
By: Fernando T

Continue Reading »]]>
Fri, 14 Oct 2016 05:19:29 PDT
I would like to shift a logic 1 though pins 10, 11, 12 and 13 by a pulse at pin 2 from button inputs. please help. nyama On an Aduino no I would like to make pin 2 an input. Pin 10, 11, 12 and 13 out puts which will go high then low in turn on subsequent pulses on pin 2. I want to drive 4 LEDs one after the other on and off. If I press and release button at pin 2, led 10 comes on. when I press the button the second t...
By: nyama

Continue Reading »]]>
Thu, 13 Oct 2016 19:15:48 PDT
Is it possible to use PWM on Arduino to control the voltage of an external power source? Shizen Let's say I want to vary the speed of the motor that operates at 12V. Since PWM on Arduino only provides the maximum current of 5V it can't power the motor sufficiently. So my question is how can I use PWM on Arduino to increase or decrease the input voltage of the external source? I will appreciate...
By: Shizen

Continue Reading »]]>
Sat, 8 Oct 2016 20:14:53 PDT
How To make a Robot that comes to you by pressing a button? Joel Spiteir Hi Guys, I was wondering if anyone one out there could help me.  I have an idea for a house hold robotic drink dispenser using Arduino. I want to create it so that when you press a control button it comes to your location without hitting walls and furniture. I was thinking using some form of IR tran...
By: Joel Spiteir

Continue Reading »]]>
Fri, 7 Oct 2016 19:27:40 PDT
Multiple RFM69HCW with the same Node ID? bigjohn412 I wan wondering if it was possible to have multiple RFM69HCW ( nodes with the same node ID on the same channel. My project I am doing involves a large amount of receivers and 1 transmitter in which I need all the nodes to receive the same message at the same tim...
By: bigjohn412

Continue Reading »]]>
Sun, 2 Oct 2016 17:08:49 PDT
How to take the project off of the arduino board? bpwmd So i have been looking for a long time for a way to "take the project off of the arduino board" (unsure what else to call it so that hampers my search) in order to reuse the board without buying a new one, or dissemble the old one each time i do a new project. Then i stumbled upon this instructable ...
By: bpwmd

Continue Reading »]]>
Mon, 26 Sep 2016 11:00:59 PDT
Control RFM69HCW with Adafruit's Pro Trinket 5v? bigjohn412 Hello, I'm having an issue controlling the RFM69HCW board ( with the Pro Trinket  5V ( The issue is when I go to compile an example code, the SPI class gives errors such as:  ...\Arduino15\packages\arduino\hardware\avr\1.6...
By: bigjohn412

Continue Reading »]]>
Tue, 20 Sep 2016 15:10:44 PDT
attiny85 tilt switch dc motor wesm4 hello my project consists of an attiny85 with an led a dc motor a tilt switch and  a button. the button changes the pwm values and the led goes to the same values to know the strength of pwm.  the tilt switch will activate the dc motor at the corresponding pwm speed based on how many times the butt...
By: wesm4

Continue Reading »]]>
Thu, 15 Sep 2016 14:14:39 PDT
I am using 4 servo motors operating on same arduino board.Power source I am using was 12V 2A adapter.Is it sufficient? ganesh27 Since a servo motor operating voltage is about 6v.Is it safe for motor to use 12V 2A adapter?Power for all 4 servo motors are is supplied from ardunio board.All 4 servo motors are connected in parallel. 
By: ganesh27

Continue Reading »]]>
Mon, 12 Sep 2016 09:19:04 PDT
how to download software and install? milomir i am trying to hack eeg force trainer toy with aurdino, computer and i have difficulty downloading software,caan somebody help me?
By: milomir

Continue Reading »]]>
Sun, 4 Sep 2016 10:54:52 PDT
Arduino DFPlayer MP3 player with Light sensor (LDR Module) as trigger GellertK Hi everyone :) Yet another question... So I got my self a DFPlayer mini (mp3 player module) for Arduino, and a nice tutorial on how make it work, but I want to use s Light sensor (LDR Module) instead of a button (I just need play and pause or stop for my gift box) So at the moment if I connect the...
By: GellertK

Continue Reading »]]>
Sun, 4 Sep 2016 02:06:58 PDT
Nrf24L01+ and Android Roberson JuniorF Hi, Is a simple way to communicate nrf24L01+ and Android Smartphone? Best,
By: Roberson JuniorF

Continue Reading »]]>
Fri, 2 Sep 2016 12:41:25 PDT
Unable to reverse direction of servo using arduino akshaydodkade I have arduino and a perfect code for moving servo to bidirection, but now i have facing problem of reversing the servo. I have replace three servos but having same problem. please help to detect is there is error in my arduino or servos?
By: akshaydodkade

Continue Reading »]]>
Fri, 2 Sep 2016 12:11:03 PDT
How do you build a decibel meter? MauricioA33 I'm triying to measure noise contamination on an airport runway, so i need values from 60DB - 160 DB. I only have found high sensitivity sensors. Any idea on how to build a less sesitive one?
By: MauricioA33

Continue Reading »]]>
Fri, 2 Sep 2016 11:43:02 PDT
Arduino pro micro RFID and servo NasrE1 I've successfully implemented Door Unlock system described in this tutorial. At first I used Arduino Uno and RFID RC522 Reader and MG90S Micro servo. When I used Arduino Uno with Arduino Pro Micro for arduino ATmega32U4 5V/16MHz, the RFID reader stops wirking after pluging the servo. Since Arduino ...
By: NasrE1

Continue Reading »]]>
Tue, 30 Aug 2016 10:07:28 PDT
need help : How to extract fingerprint image from Waveshare uart fingerprint using arduino ? AhmadQ8
By: AhmadQ8

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
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

Continue Reading »]]>
Sun, 19 Jun 2016 00:35:43 PDT