I want to know how to make an algorithm to save in memory. help!

Topic by gabon   |  last reply


I would like to meet how integrated the fuctions interrupts in the encoder for increase the count in the car What am I doing. help!

Topic by gabon   |  last reply


I am new in the programming stuff and i have, un familiar error problem. I hope you guys cold help me. thank for all the answers!!

Topic by ברקו   |  last reply

LCD Screen of arduino

Recently on ebay to buy online an arduino screen , the price is very cheap. Effect do not know how ? ? Anybody know?

Topic by michael g   |  last reply

Arduino gcode reader?

I can run my stepper motors just fine, but I can't interpret gcode.  Does anyone know of Arduino C code that can change gcode into x,y,z coordinates plus speed?

Question by frasej   |  last reply

IC connection with Arduino .

How to connect IC L298n with Arduino ??

Topic by manjusulagna154   |  last reply

Echo Location / Arduino / Michropones

Hello guys, So, I´d aprecciate if you could give me any ideas about echo location using microphones or ultrasound detectors, the idea is to put three or four sound detectors and put any object in the middle so that way because of the sound I could know where the object is, by using the detectors

Topic by JoséG100   |  last reply

Arduino controlled lawn mower

Hi I  wants to make arduino controlled lawn mower as my Mechanical Engineering final year project  while doing so I’m facing problems such as which dc motor will be suitable for wheels and cutting blades  and driving unit for these motors.,which sensors are necessary for complete automation as well as coding required while implementing all these components. It is difficult for me to finding formulae to calculate torque and power.I want to make it process automated so that bot automatically move in rectangular area and if in between it’s battery gets down it should automatically go to charging point and come back to place where it stopped cutting when battery was down. For this which coding as well as interruption required is also a doubt for me.For all these operation which battery will be useful? And its capacity Also it will be helpful if all the components required for this project will be available from any single platform. For all these it will be helpful for me if I get some Ideas from here and move ahead in my project Any other links or suggestions wil be also helpful.If kit for above mentioned specs are available please contact on my mail id Thank u

Topic by pratiksarvankar   |  last reply

Arduino & Neo Pixel help... Answered

Hey Everyone ! I've been having some problems with the Adafruit Neo-Pixel Library Using Arduino. I need to set the Entire strip to one color and no mater how many google searches I do I can't find the code. Rather then the "colorWipe" or "theaterChase" mode I need to set a strip of 39 pixels to one color all at once. Or, just fast enough that you can't tell the difference. I remember using a command once that did this, but for the life of me I can't find it >.< Any Ideas?

Question by Wired_Mist   |  last reply

How to connect Android 4.1.2 with arduino

I made some programs for arduino and android to connect android with arduion via blutetooth. There are the programs made in MIT app inventor,ony for switching on and of diode). This program work on HUAWEI G730-U00 with older android version,but on Sony Xperia GO with 4.1.2 android i can't connect phone and bluetooth module HC-06. Someon know what is the problem?

Topic by bojan851   |  last reply

arduino TFT LCD-2000-7775

I heard some persons said arduino LCD is the same as LED we usually use the same, try to use LCD this time to do a screen , it is very nice , I really like and the price is also cheaper than the LED , more surprising is that it can also add their own memory card to increase capacity.

Topic by yeeyuen 

How to use gear motor 9 with Arduino

I am new to robotics. I want to make a robot using Arduino Uno R3. I need to use Gear Motor 9 for that The problem is that motor needs 50mA current. But arduino only outputs only 40mA current. I want to supply the motors with another power source and use a switch to connect both the circuits. Can you please tell me what type of switch I can use. Thanks in Advance. P.S. Sorry if I used any wrong technical terms

Topic by sampath_o2   |  last reply

problem with making my Arduino Ethernet shield to communicate with the server

I have a problem making my Arduino Ethernet shield to communicate with the server, the result on the serial monitor is always: Not connected Cannot connect to Server #include #include //------------------------------------------------------------------------------- byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //MAC Address char server[] = ""; //pushingbox API server IPAddress ip(192,168,1,2); //Arduino IP address. Only used when DHCP is turned off. EthernetClient client; //define 'client' as object String data; //GET query with data float temp; //temp means temperature boolean cste = false; //------------------------------------------------------------------------------ void setup() {   Serial.begin(9600);   if (Ethernet.begin(mac) == 0) { Serial.println("Failed to configure Ethernet using DHCP"); Ethernet.begin(mac, ip);   }   delay(1000); } //------------------------------------------------------------------------------ void loop(){    int temp_ADC = analogRead(0); //read analog input on pin A0    temp = temp_ADC * 5.0 * 100.0/1024.0; // ADC to celcius conversion    tempData(); //packing GET query with data    Serial.println("connecting...");    if (client.connect(server, 80)) {      sendData();       cste = true; //connected = true    }    else{      Serial.println("connection failed");    }   // loop   while(cste){     if (client.available()) {    char c =; //save http header to c    Serial.print(c); //print http header to serial monitor     }     if (!client.connected()) {    Serial.println();    Serial.println("disconnecting.");           Serial.print("Temperature Sent :");           Serial.println(temp); //print sent value to serial monitor    client.stop();           cste = false;           data = ""; //data reset     }   }   delay(5000); // interval } void tempData(){   data+="";   data+="GET /pushingbox?devid=vB917B251887BF54&tempData;="; //GET request query to pushingbox API   data+=temp;   data+=" HTTP/1.1"; } void sendData(){   Serial.println("connected");   client.println(data);   client.println("Host:");   client.println("Connection: close");   client.println(); }

Topic by SoufianeG   |  last reply

how can i transfer data file from sd card to my Windows PC through WIFI.

Hi I'm using the Arduino to log data on to an SD card and I would like to be able to transfer that file on the card to my Windows PC for further use it, through WIFI. how can i make that possible.

Topic by SoufianeG   |  last reply

problem with UDP.print

Hi everyone my problem is that i want the send 3 sensor data over ethernet UDP in one time  and i don't know the way to do that thank's for your time #include //Load Ethernet Library #include //Load UDP Library #include //Load the SPI Library byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xEE}; //Assign a mac address IPAddress ip(192, 168, 1, 252); //Assign my IP adress unsigned int localPort = 4000; //Assign a Port to talk over char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; String datReq; //String for our data int packetSize; //Size of Packet EthernetUDP Udp; //Define UDP Object float temp; //temp means temperature float speed; float charge; float dataSend[] = {temp, speed, charge}; int temp_ADC; int speed_ADC; int charge_ADC; void setup() {   Serial.begin(9600); //Turn on Serial Port Ethernet.begin(mac, ip); //Initialize Ethernet Udp.begin(localPort); //Initialize Udp delay(1500); //delay } void loop() {     packetSize = Udp.parsePacket(); //Read theh packetSize     if(packetSize>0){ //Check to see if a request is present, UDP_TX_PACKET_MAX_SIZE); //Reading the data request on the Udp   String datReq(packetBuffer); //Convert packetBuffer array to string datReq     if (datReq =="ordre") { //See if Red was requested       temp_ADC = analogRead(0); //read analog input on pin A0     temp = temp_ADC * 5.0 * 100.0/1024.0; // ADC to celcius conversion      speed = analogRead(1); //read analog input on pin A1     charge= analogRead(2); //read analog input on pin A2     Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());  //Initialize Packet send     Udp.print(temp); //Send string back to client     Udp.print(speed); //Send string back to client     Udp.print(charge); //Send string back to client     Udp.endPacket(); //Packet has been sent     delay(1500); //delay   }      } memset(packetBuffer, 0, UDP_TX_PACKET_MAX_SIZE); }

Topic by SoufianeG 

Help with CNC controller

Hi , Can please somebody help me with using a4988 pololou stepper motor driver.I want to use it with arduino.

Topic by IBH   |  last reply

How do I go about hacking a wheelchair joystick? Answered

I have a wheelchair and would like to use it as a base to a autonomous robot. I wonder if it would be better to hack the joystick or strip everthing away leaving the motors and frame and control it with Arduino or something similar. I have only used Arduino with small hobby motors. Looking for any suggestions.

Question by Paul Fjare   |  last reply

Common power rgb leds

Hello, I followed a great instructable here to make rgb led bars. It uses the ledwiz controller. I wanted to shift it over to an arduino controlling the thing. My main problem is that the leds I have is that they have one power lead, and 3 grounds to control the color. how would I get that to work with an arduino? Thanks ~penguins

Topic by penguins   |  last reply

Please Can you help me

Please Guys I want Arduino Code for this projrct : am using ESC to control the speed and Gy-81 as feedback to control position Hardware : Arduino Uno Gy-81(10DOF) 1000kva Brushless motor 30amp Esc

Topic by hakeem.1987   |  last reply

Q: How to light up a float using arduino

Every year we make a float, up till now we used GU10 white lights to light it up. Now for this year i would like to use RGB led lights to do this and create an extra effect.To do this i am going to use an arduino uno to controle the lights, in order to controle the effects i would need some type of lightbulb which produces enough light and be controlled by the arduino preferably using a data line,It would be awesome if i could create the effects similar to a led strip, using lightbulbs over the entire float. Thx for ready my question and i hope you can help.

Question by PieterD29 

Vending machine

I am looking for someone who wants to do a mini vending machine project.

Topic by Simon-does   |  last reply

Run servo motor for specific time?

I need to run the servo motor just for 5 sec ( for example ), then after that, the servo will remain back off until specific time come back. this servo mainly use for feeding in aquarium system. I want the servo run twice per day. 

Question by AmirulH6   |  last reply

Servo SM-S4304R

After long time of searching, without success, i would like some help. I purchased one Sm-s4303r servo motor. My questions are: 1.How can i do it work for 3 seconds at normal speed and to stop it for example 12hours. To work 2 times per day. 2.What will be the suitable servo which can do 180° in every movement. I mean 180° now and the second (to complete the cycle 360) in 10 hours.. I would be glad if somebody could help me. Thanks, Chris

Topic by chris__p   |  last reply

Servo Position

Hey i was trying to control the servo using joystick(potentiometer). i am but stuck at a problem when joystick is at center servo is at 90° when i move the joystick to left, servo sets at 0° and when i release the joystick it came back to its 90° but when i move the joystick to right, the server does sets to 180° but does not come back to 90° on release the joystick, it sets to a little more than 90° like 100° what could be the problem ? #include Servo servo; int sp ; int js_x; void setup() { servo.attach(3); } void loop() { sp= map(js_x ,0 ,1023, 0, 180); servo.write(sp); }

Topic by DabuHackker   |  last reply

How to do a screen like this?

Hi,Does everyone know how to reproduce a screen like this?It would be to implement in front of a led matrix.Thanks.

Question by dreamstoxics   |  last reply

Help with building an off-grid solar powered greenhouse

Hey All!  I've been wanting to build an autonomous greenhouse (a growbox, frankly) in my apartment, as a proof of concept to build a real one in a place where is difficult to get energy to. I've some experience in building things, I know my way around a solder and given a schematic, I can pretty much do what needs to be done, but I have almost zero technical knowledge on the why the parts go where they go. My real question is if there is an instructable here that I haven't found that would allow me to build something that works like an alternator, that would allow my battery pack (4 unprotected 18650) to power the arduino controller when the solar panel isn't outputting energy enough and to recharge my battery pack when the solar panel outputs enough energy to power the arduino with some surplus (that would go to the battery). In case the battery pack is at full capacity, the excedent would be directed to a another output (that I would most likely not use, or would use something to drain that, like led strips or something). If there isn't an instructable, any site with this info would be nice. I also could use lots of Instructables (or outside sources) to build the thing. I tried to search for it, but english is not my first language, so I don't really know how to search for this. I don't know if I was clear enough or if this is the right place to ask. In case there's need for more info, just ask me, please! Thanks in advance for all of you who makes this community awesome!

Question by acustodio1   |  last reply

Advice for hydraulic master thesis.

Hello, I’m a civil engineering student and I’ve always had a special interest for electronics, sensors, and arduinos. I’m finishing my degree for which I have to develop a thesis. After some research and based on some articles, I proposed to my hydraulics Professor to monitor the solids transportation (at the bottom of a river) using a hydrophone. This idea consists on measuring the intensity/quantity of sediments (like rocks and muds) passing through a certain spot. These measurements are made using a hydrophone put underneath a seel plate – when the sediments pass beneath this plate they create impulses or frequencies, which will then be analyzed. What I would like to know is the best way to capture these frequencies through the hydrophone – mobile recorder, daw, arduino? I intend to connect the hydrophone to the computer, either through the arduino or through a sound plaque, but I’m afraid these solutions are more prone to the appearance of noise. The frequency range to analyze is between 10Hz and 30kHz. Will it be a good solution to connect the hydrophone to the arduino? Another issue in my mind is the handling of the data gathered – should I use excel, matlab or python? Thanks, Carlos Esteves

Topic by amagro   |  last reply

lcd sharp LQ038Q5DR01


Topic by hhofkhan   |  last reply

looking for a component to control my 36v500w motor speed and direction from an arduino

Hello! I am currently trying to build my won electric scooter. i bought this motor;=item20e5b8bbc3&vxp;=mtr and i have a 38v 10A battery which i plan on turning into 20A further more i plan on using a resistor to change the out volt to 36v. i am now looking for a controller that i can connect to an arduino so the arduino can control the speed and direction of the motor. any suggestions?

Question by bfeher1   |  last reply

Need help for improving PING Ultrasonic sensor code to make it precise

Hi guys,               I havebuilt a circuit to detect the swinging of an object using ultrasonic sensor and send signals to the Arduino Duemilanove board which in turn activates the solenoid. The circuit is working fine but I'm using a PING Ultrasonic sensor and I'm having hard time controlling it with the code. Do you have any idea about how to control and make the readings precise for the Sensor? If you want, I can post my code here... Any help is appreciated. Thanks in advance!

Topic by kailash174   |  last reply

New Certificate from The Cooper Union for the Advancement of Science and Art

The Cooper Union for the Advancement of Science and Art is adding a new Certificate program: DIGITAL REPRESENTATION AND FABRICATION. The first two courses, offered this fall, are Introduction to "Digital 3-D Modeling" and "Physical Computing with Arduino." We are also offering "Drawing and Painting on Tablets and Smartphones", "Building Apps for Mobile Devices," "Introduction to Photoshop" and "Final Cut Pro X." Information about all these courses (and a wide range of others) can be found at Founded by inventor, industrialist and philanthropist Peter Cooper in 1859, The Cooper Union for the Advancement of Science and Art offers education in art, architecture and engineering, as well as courses in the humanities and social sciences. For more info: David Greenstein Director of Continuing Education and Public Programs Tel: 212-353-4198    Fax: 212-353-4183

Topic by davidgreenstein 

Controlling 6 steppers for Orrery

I'm currently designing an orrery planetarium and my current mechanical geared design is rather dense (See attached images) takes up a lot of space, and would involve a lot of gear fabrication. So I'm wondering if I can use 6 stepper motors to run the system and do the ratios in code. If it helps reduce the cost, size, and adds more control options (like inputting a specific date and having the planets move to it) it could be worth consideration.I'm just currently unsure of the best way to control 6 steppers. I'm looking into an Arduino Mega for starters, but I'm not sure how much I/O I can get away with. I plan to just do tests with one motor at a time until I've got six running.The good news is the inner orbits are a smaller diameter involving fewer rotations per orbit and while the outer rings are larger and although they require more rotations per orbit, they move much slower. I can probably find a way to add limit switches if necessary and the I/O allows it, which might be nice for calibration. I don't see this as something I'll be running all the time, since I could see it needing a power supply and long term continuous operation may not be possible with the motors. I'd be open to using servos instead if they could use fewer I/O pins and still rotate continuously, but I'm still doing research. I'm open to any suggestions, ideas, or criticisms for this approach and any assistance is appreciated.For now, I'm still in gear land.

Question by MattGyver92 

problem with annotate()

Hi im trying to plot live data on python from an arduino through the serial port  i found some difficult with annotate function i don't know how to configure the third parameter (position) python code import serial # import Serial Library import time #import time import numpy  # Import numpy import matplotlib.pyplot as plt #import matplotlib library from drawnow import * temperature= [] vitesse= [] charge= [] current= [] Time = [] arduinoData = serial.Serial('com5', 9600) #Creating our serial object named arduinoData plt.ion() #Tell matplotlib you want interactive mode to plot live data cnt=0 ##fig1 = plt.figure() STARTINGTIME = round(time.time(),2) def makeFig(): #Create a function that makes our desired plot         plt.subplot(2,2,1)     plt.subplot(2,2,1).annotate(str(temperature)+','+ str(Time), textcoords='offset points')     plt.title('Live Streaming Temperature Sensor Data')     plt.ylabel('Temperature C')     plt.grid(True)     plt.plot(temperature, 'ro-')     plt.subplot(2,2,2)     plt.subplot(2,2,2).annotate(str(vitesse)+','+ str(Time), textcoords='offset points')     plt.title('Live Streaming Speed Sensor Data')     plt.ylabel('Speed KM/H')     plt.grid(True)     plt.plot(vitesse, 'bo-')     plt.subplot(2,2,3)     plt.subplot(2,2,3).annotate(str(charge)+','+ str(Time), textcoords='offset points')     plt.title('Live Streaming SOC Sensor Data')     plt.ylabel('Battery Charge %')     plt.grid(True)     plt.plot(charge, 'go-')     plt.subplot(2,2,4)     plt.subplot(2,2,4).annotate(str(current)+','+ str(Time), textcoords='offset points')     plt.title('Live Streaming Current Sensor Data')     plt.ylabel('Current A')     plt.grid(True)     plt.plot(current, 'yo-')     while True: # While loop that loops forever     while (arduinoData.inWaiting()==0): #Wait here until there is data         pass #do nothing     arduinoString = arduinoData.readline() #read the line of text from the serial port     dataArray = arduinoString.split(';')   #Split it into an array called dataArray     temp = float (dataArray[0])     vite = float (dataArray[1])     char = float (dataArray[2])     curr = float (dataArray[3])     temperature.append(temp)                     #Build our temperature array by appending temp readings     vitesse.append(vite)                     #Build our vitesse array by appending temp readings     charge.append(char)                     #Build our charge array by appending temp readings     current.append(curr)                     #Build our current array by appending temp readings     Time.append(round(time.time(),2) - STARTINGTIME)     drawnow(makeFig)                       #Call drawnow to update our live graph     plt.pause(0.00001)     cnt=cnt+1     if(cnt>50):         temperature.pop(0)         vitesse.pop(0)         charge.pop(0)         current.pop(0)

Topic by SoufianeG   |  last reply

How to build a reel-to-reel tape device which handles photos?

I want to make a physical interface for selecting a picture. I will have a band of something which has little 1" plastic pockets on it.  Each pocket will contain a small photo of a person. The band would be somehow attached to spools which would rotate via servos. So the user presses a button to advance the spool one spot, and a new picture comes in the front. I don't care if the pictures get a little bit bent, but they shouldn't get destroyed. Let's assume the entire device is about 5" across, so two spools taking up an inch or so each, some space on the sides and one picture showing in the middle. Just having two spools and a band which connects to itself is easy enough I think if it is the right length, but ideally, I'd like to store more images than can fit across 5" in the front and 5" in the back... so it would be something like an old tape machine. (i.e. the pictures wrap around a spool). I have no idea how to accomplish this :)  I'm guessing the band would have to attach to the spool on each side... Any hints? Links? gotchas? THanks!!

Question by JacobS231   |  last reply

How to solder LED's to PCB with resistor? Answered

I am trying my first electronics project and found this an ideal project to just apply the basics. I basically have a PCB on which I have want to solder LEDs (and provide 270k ohm resistor protection). I just learnt basic soldering stuff and soldered a LED and a resistor on the PCB, but don't have clue about the connection to be made for the circuit. Neither does the above project which I surmised as a good starting point mention about any circuit diagram, and further its connections with the Arduino. Can somebody point out how do I connect a simple LED and resistor in a circuit? [Current image attached] And in the context of the above project that I am following, how do I create the circuit and connect with the Arduino? Thanks!

Question by harpreet31   |  last reply

Having trouble with Marlin RepRap library

I am currently in a senior design group at Saint Louis University and we are working on a "DIY" 3D printer using electronics parts from SainSmart (Arduino Mega 2560 & RAMPS 1.4) & Hardware from McMaster-Carr. We loaded on two libraries to the Arduino: 1) Marlin RepRap ( 2) U8GLIB ( [which is used to supplement the Marlin RepRap] We have the LCD GUI set up and we are sending commands from the LCD to make small X, Y, and Z steps. It seems like the Arduino recognizes the signal and does send it to the stepper motors, but all the motors do are sort of 'vibrate' and not really spin. If we take small steps we get a little movement, usually which is incoherent. We recently moved the voltage down to 10.5V from 12V from our power supply (because of the 1.5V from the USB to the Arduino), because 12 V caused smoke to come from the Arduino's voltage regulator. We don't know if this is causing the problem. We also do not have the heatbed hooked up because we do not need it for our purposes. We are using a 12V 18 Amp PSU. We were able to get the mechanical endstops to work and the fans to work, but we cannot get the motors to work properly. Does anyone have any suggestions, or has anyone worked with this Arduino library who could help us out? BTW: Our SainSmart kit is: Thank you everyone ahead of time for all your wonderful help and guidance!

Topic by JakedGr8   |  last reply

Does anyone know how to build a robot water sprayer using arduino?

If the robot detecting a plant using an ultrasonic sensor, then it will spray a water.

Question by Temarie   |  last reply

Home automation & Home door sequrity including one android apk file project available ???

Please help me for this project. how will be arduino program code , which pin are connect to apparatus to apparatus. please give me all description step by step this project implimentation. Project planning:-                   1.Home automation & Home door sequrity including one android apk file.                   2. 4 Relay:   1. Blue led light.                                 2. Red  led light.                                 3. White led light for bath room using PIR sensor.(this light switch on/off only using pir sensor,                                            because-wet hand electric shock on switch or, damged mobile display).                                 4. Fan using voltage regulator.                                  note:- light switch on/off & fan switch & voltage regulataor incease/decrease including appk file.                   3.Home squrity switch board on/off may be   a.display board on wall of house.                                                                b. display in android apk file.                   4.when open door with corect srquirty,then photo upload in memory card.if incorect password then a lout of sound.                   5.when fire in house ,alarm using gas sensor. Room temperature, huminity show in display. Apparatues:            A: Led light on/off by mobile app.                  1.ESP8266 Serial Wi-Fi Wireless Transceiver Module for IOT.                  2.Generic(unbranded )4-channel relay control board module with optocoupler, 4 way relay module for arduino                  3.Arduino Uno R3 ATmega328P ATMEGA16U2 Compatible with USB Cable.                     or,xcluma Atmel Atmega 2560 Mega2560-16Au (16 Mhz) R3 Board+Usb Cable For Arduino.                  4.Led light 3(Blue,Red,White for Bath room),Motor Fan.                  5.REES52 REES_2 Bread Board or Solderless Pieces Circuit Test Board Project Board.                  6.Jumper Wires Male to Male, male to female, female to female.                  7.Generic KG001 HC-SR501 PIR Sensor Pyroelectric Infrared Module 2pcs(for bath room & door open).                  8.Adraxx LM7805 7508 Positive Voltage Regulator IC, 5V 1A.                  9.Resister 1k ohm.                  10.REES52 MQ2 Arduino Compatible Gas Sensor, Methane, Butane, LPG, Smoke Sensor.           B: Home sequrity.                  1.Quantum QHM495LM 25MP Web Camera.                  2.SanDisk Ultra MicroSDHC 32GB UHS-I Class 10 Memory Card With Adapter.                  3.REES52 621033926893 Universial 16 Key Switch Keypad Keyboard Fit for Arduino by REES52.                  4.Silicon Technolabs 20x4 Line LCD Display With Blue backlight HD44780 for ALL Arduino,Rasp Pi,AVR,ARM,8051 (Blue). Software:      1. Arduino-1.8.5.                2. wampserver & notepad++ (for php web page).                3. Android Apk file.      please help me for this project. how will be arduino program code , which pin are connect to apparatus to apparatus. please give me all description step by step this project implimentation.  i will waiting for you.

Question by somnathpanjaproject2018   |  last reply

How do I connect the phototransistor and emitter in this tutorial?

Hi, I'm currently working through the above tutorial and am struggling with setting up the Phototransistor and Emitter. There is a circuit diagam on the third page of the tutorial but I cannot work out how to connect the Emitter and Phototransistor to the rest of the circuit. If anyone could advise me further I'd be very grateful. Kind regards, KugarWeb.

Question by kugarweb   |  last reply

Help requested for purchase of components

Hi. I'm a newbie to embedding but I have a project that needs this and there is no commercially available solution that I can find so I need to learn how to build it myself. This can and will be done in modules... I figure I can tackle one task at a time until I end up with a complete working system, but use the system in the meant time, as I get it completed. The main goal is for an electric motorcycle conversion dashboard,  which will include a password protected relay switch "ignition key" to power the vehicle on securely (Task #1), a user configurable display to show speedometer, odometer, tripometer, clock, battery pack voltage, motor rpm/temp, controller temp, coolant temp, etc via a waterproof rugged tablet (probably a Windows 10 tablet, probably with an Android emulator installed). I'm finding that there are so many different options available, I don't know what to purchase. I want to spend my hard earned money wisely and just buy what I need the first time. Instead of learning the "hard" way, I want to learn the "smart" way. Please help me get started. Thank you in advance!

Topic by Stevonator   |  last reply

Compatible together.

After buying a wireless transceiver , I put it that compatible with a LCD Srceen of Arduino, the data on this screen can be a computer display , so cool, I do not need to record. data.

Topic by yeeyuen   |  last reply

Low voltage health problems

Hello, I saw a great project on youtube, a water button, and gave it a try. it works, all it does is when one touches water, a led turns on, just a proof of concept. But what I was worried about, is if there are any negative health impacts of 3.3 v going though you and into the ground? The power is not noticeable, but still, I worry. ps. I did Google this, but couldn't find anything.

Topic by penguins   |  last reply

Would you like your own satellite? (Contest with $1500 prize)

Oh the joy of Twitter!  I just found out about this very cool contest from Discover Magazine via BoingBoing: Imagine having your own personal satellite orbiting the Earth. It’s got cameras and sensors galore, and you can use it to run experiments, take pictures, and even beam messages back to the blue marble. Well, that geek fantasy will become a reality if the ArduSat project, which you can see here on Kickstarter, reaches its funding goal. The general public will be able to rent time on this small satellite and use it for whatever they please, courtesy of its Arduino processor. [The folks] at Discover Magazine think this is pretty neat. And [they'd] like to give away a development kit worth $1500 to the Kickstarter donor who submits the best idea for an in-space experiment before July 15th, 2012. The kit includes Arduinos and an advanced sensor suite shipped to your home address, as well as one week of up-time on the satellite to run any experiment. You’ll be able to build the experiment yourself and have it be sent up on ArduSat when it takes to the skies. Here’s what you have to do to enter the (drumroll) Discover Space Challenge: (1) Fund the ArduSat project, for however much or little as you desire. You’ll receive a personal code that identifies you as a donor. (2) Read the contest guidelines here to learn about how you should design and submit your idea. (3) Enter with this entry form, making sure to include your personal code. (4) Wait for winners to be announced on July 20th, after judging by Discover blogger Phil Plait, Discover Editor-in-Chief Corey Powell, and an expert panel of judges. (5) Rejoice!  

Topic by Kiteman 


Hi I am thinking about making an 4x4x4 LED cube with 10mm LEDs for a 10 week project and wanted to ask about a few things which I am unsure of: Firstly:  I planned on following an instructables guide such as or similar but these are all for the standard 5mm led . What I wanted to know is will these plans still work or will they need to be changed alot due to the more current being drawn? (apart from the obvious change in resistor values) Also I aren't sure whether to charlieplex the cube or multiplex it yet , Which is easier? In addition, Is the construction of the actual cube grid the same no matter which technique used ? {as i wanted to build the actual grid first to get it out the way then concentrate on the other parts} Any Help and tips appreciated  Thanks

Question by 369ben   |  last reply

Can i fix this error directly from the cnc softwars (GRBL / LINUXCNC / MACH3 )? or i should make a new table

Hello, friends, I have some questions. I hope you will help me in answering them. Yesterday I finished making my CNC machine table but there are some mistakes in the measurements because the iron bar I used was not 100% straight. This simple diagram shows the place of simple curvature in iron bar. My question is whether can i fix this directly from the cnc softwars (GRBL / LINUXCNC / MACH3 ) or i should make a new table . and thank you for help

Question by abdelkrim30 

My first Free3D print

Three months ago I submitted instructables into one of the challenges, and was selected to received Free 3D print. I chose to have my 3x3x3" 3D print instead of a famous 3D instructable robot. Two weeks ago, my 3D print got delivered in the 123D box, to my door. Also included in the box are an instructables patch and stickers. My 3D print is the case for my RevIO, an Arduino compatible board. A prototype that I'm made recently. ( Thank you very much for the Free3D Print program and everyone behide this program, otherwise I won't be able to see my project moving forward to this point. Thanks sath02

Topic by sath02   |  last reply

Welcome to Instructables

On this page you can find links to some of our most frequently asked questions. What is this site? Instructables is a place that lets you explore, document, and share your creations. How do I post an Instructable? We offer a free and easy online class to coach you through posting your first Instructable or you can just wing it and start a new one today. How do I get help improving my Instructable?Ask the community for help in The Clinic. How does my Instructable get featured? The best way to get your projects featured is by following the Featuring Guidelines. Where can I learn more about contests? Our Contest FAQ has all of the information that you need to know about contests. What contests are launching soon? Check out our list of upcoming contests. Are you on social media? Yes! Follow us on Pinterest, Instagram and Twitter. How do I contact Instructables directly? The best way to contact us is through our Contact Page.

Topic by randofo   |  last reply

What voltage / amperage / frequencies can I expect from the tach line of a 2001 eclipse v6?

The question is all in the title, but any way.  What numbers can I expect to see from the tachometer signal line of my 2001 mitsubishi eclipse v6?  I've read that some times it can be like 3 cycles for every 1 RPM.  I would assume it was running at 12 volts, but is this false?  What kind of amperage could I expect to be pulled on that line as well?  I plan on connecting an arduino to this to get the frequency as an input (new new new newbie to arduinos!).  Can I expect to need to step down the voltage, if so, how?  Is there some basic principle or standard for the tach line that I am unaware of?  Any help with the tach line info or how I should connect it to the atmega chip would be AWESOMELY helpful!!! -James

Question by sephiroth67   |  last reply

Stepper motor from cd-rom wiring out

Hi guys I have a nasty problem with this stepper motors it cant move, I just press a little bit with my finger and I feel the motor trying start. I`m using Arduino uno conected with a uln2003 and the stepper motor is attached to the IC driver the code is offcial from arduino IDE #include const int stepsPerRevolution = 400;  // change this to fit the number of steps per revolution // for your motor // initialize the stepper library on pins 8 through 11: Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11); int stepCount = 0;         // number of steps the motor has taken void setup() {   // initialize the serial port:   Serial.begin(9600); } void loop() {   // step one step:   myStepper.step(1);   Serial.print("steps:" );   Serial.println(stepCount);   stepCount++;   delay(500); } WHAT IS MY FAIL?????

Topic by jdev   |  last reply