Powerline communication

Hello I'm intrested in plc (powerline communiction) but I can't find specific schematics and / or "to the point" information. If someone can help me with information ect... or anything use full??  Thnx

Topic by geo bruce   |  last reply

Wireless Communication Answered

I want to make some small cheap (possibly from toys) walkie talkies it would also be handy if i could attach some headphones(with inbuilt [eg iphone headphones] or seperate mic) im hopeing to have signel ~100-500m but anything will do.

Question by s117   |  last reply

NodeMCU to NodeMCU communication

Dear All,I am really a newbie here playing with two NodeMCUs. I started out with basics and after a while I stepped into my actual project. The project is to display toilet status indicator. My plan is to pick up the data from PIR sensor and feed it to one NodeMCU and have another NodeMCU process the data on the other end of the room and display the status on and I2c 16 x 2 LCD. I was able to connect the PIR and LCD onto one NodeMCU and test it and things were fine. I am really looking for some help to use TCP/IP protocol to have the nodeMCUs communicate to each other.My basic code is as below:#include#include int sensor = 13;LiquidCrystal_I2C lcd(0x27, 16, 2);void setup(){ Serial.begin(115200);Wire.begin(D2, D1); pinMode(sensor, INPUT); pinMode(LED_BUILTIN, OUTPUT);lcd.begin(); }void loop (){ long state = digitalRead(13); if (state == HIGH){ Serial.println("Motion recognized"); lcd.setCursor(5, 0); lcd.print("RESTROOM IS"); lcd.setCursor(0, 1); lcd.print("OCCUPIED"); digitalWrite (LED_BUILTIN, LOW); delay(5000); lcd.clear(); } else { if (state == LOW); Serial.println("Motion Absent!"); lcd.setCursor(0, 1); lcd.print("NOW VACANT"); digitalWrite(LED_BUILTIN, HIGH); delay(5000); lcd.clear(); }}Thanks for any help you can provide or guide me to examples.

Question by BharatharajV 

arduino ultrasonic communication

I was thinking about using the ultrasonic  module (hc-sr04) for communication for two or more arduino.the way i was thinking of do to turn a 8 bit number into single bits(i have no idea on how to do that) and send them one at time(with delay) to a another arduino which turn it back into a number also  has a master arduino  and slave arduinos 

Topic by act casual   |  last reply

RS 485 communication

Im trying to communicate with servos that use rs458 to move, Im going to use a chip from here: http://para.maxim-ic.com/en/search.mvp?fam=rs485&793=2.5%20to%205.5|3.0%20to%205.5|5&tree;=master probebly the MAX13181. But i need to know what pic micro to use to change the one pulse two pulse from a servo controller to a digital signal that the MAX13181 chip can understand

Question by hurtzmyhead   |  last reply

Bluetooth communication questions.

Hi all, I havent played with bluetooth before, so I wanted to ask a few questions before getting myself started. I want to create a simple robot that is controlled by bluetooth and make most of it from scratch. where there will be a transmitter and a receiver, followed by arduino that creates my PWM, the H-bridge and finally the motors.  I was wondering how exactly does the bluetooth work. I checked a little bit online for the prices.  the standard bluetooth dongle that connects to a PC are about 2-5$. but the arduino shields are 60-100$. I was wondering if I can get myself 2 bluetooth USB dongle and make them communicate between each other.  Is it because there are other 'modules' neccessary to properly communicate that the computer has so we cant use a dongle on the arduino which making us buy the expensive shield? So to recapitulate, my point is, can I use a standard cheap usb dongle to both send and receive information?

Topic by bjaii 

Serial communication on Arduino? Answered

I tested a QRD1114 reflective sensor using a voltage meter, and was working great. I was getting good responses from the sensor (one of the sensors I was using had a bad LED which was not working, but the sensor worked fine with an external IR LED that I had laying around.) But as soon as I hooked it up to an analog input pin of my arduino board, and used the serial communications to display the reading from the sensor on the serial monitor, every reading would be 1023 (which should be the highest possible reading) even when there wasn't anything near the sensor. I changed the pin, so I know it isn't a defective pin. I repeated the test with a photo cell and got similar results. what could be the problem, and what can I do about it?

Question by Higgs Boson   |  last reply

ARK, hologram community

Hello everyone ! I'm building a project, called "the ARK" : It is a holographic pyramid with a new type of interface who gives life to your projects. Holography has always been fascinating: you see your 3D, you work on it, and you can create directly with your hands. Today this type of holography is really expensive compared to the simplicity of its fabrication process. I want to give the possibility to use it for everyone. The Ark has a software suite. Your drawings, films, models, all in holograms and in 3D GPS augmented reality view, directly on your smartphone to walk in your creations. And more:  with the sensitive gloves it will be like feeling the 3D under your fingers. Films, 3D, drawings, you will be able to touch and feel all of it. THE STORY : This project started two years ago with some research in my architecture school; I created the first holographic reflector “Ark-mini” for the students of our school. This creation is now in open-source (for more information see HERE, you can translate the page) For this new project, I want to create the more intuitive, complete holographic software: you will just need an USB and HDMI connection and let’s go! Order, and the ARK will follow it with his speech recognition menu. I will present 3 softwares for the Ark:     The ARK-creator for your 3D creations     The ARK-movie: what you film is what you see… in holograms.     The ARK-net to send directly in augmented reality your project, to visit it with you tablet or smartphone. This project is a personal initiative that I have been developing since last year, thanks to the help of some forums and Internet’s people who follow me. Today I propose you to make this project a reality. The first Ark serie will be presented in Paris, at the “Futur-en-Seine” numeric convention in the “Gaité Lyrique” on 13th june, and at the end of june for my Diploma. The thing is, i want to build this project with a creative commons license (open-source), and i'm trying to build a community. For the moment, i make a simple design for the ARK, i will have six month to build the software. We can (i hope so), in the future, create something like a "Jarvis" (who do not dream about this :) ). For the moment, i'm finishing the file with the design and the prequel of the software (openframeworks). But you can register in the forum and i'will send you a newsletter when it will be done. I hope we can make something beautifull, and, it is not just an idea:  i am doing it (but i need you)! here the LINK of the project here the FORUM / COMMUNITY

Topic by vmarsat   |  last reply

Classroom jeopardy repair

We are a non profit using the classroom jeopardy 8000 game for programs with adults and students, and have had great success with participation. We have run into problems with the signal recognition acting sporadically. The company educational insights no longer sells or services the product and we have no clue who we could go to for help. Who would know the how to with this great program ? Thanks for any help you can send our way.

Question by michael mulfino   |  last reply

​Unable to do "Save As" of MPP File

I have multiple MPP files that I can no longer perform a "Save As' (into Excel, csv, etc) on. I am now getting an "Operation failed" message box. There never used to be a problem, but now there is. It is affecting multiple users, not just myself. I don't have any idea even where to begin troubleshooting what is going on. Any suggestions to repair mpp file or fix this bug would be greatly appreciated.

Question by Gerrison   |  last reply

Suggestions for a beginner project bike?

I'm jumping the gun a little bit here, but looking ahead to winter and the off season, I want to find a cheap project bike I can tinker with. I have some mechanical inclinations, but it will be a bit of learning curve, so I want something that's pretty accessible and relatively easy to work on for a beginner. I'm looking for a cruiser anywhere from 250cc to 500cc with minimal bells and whistles. Lay those suggestions on me. Showbox Tutuapp VidmateAlso, what are some red flags I should look out for that are going to end up giving me nightmares? I want a bike I can work on and learn with, but I'm definitely not looking to do a complete rebuild.

Topic by popchau   |  last reply

Community Website design? Could Drupal be used and what would be the minimum modules to make it happen?

Community Website design? Could Drupal be used and what would be the minimum modules to make it happen? Could it be done with the basic installation? Could a step by step be done?

Topic by josheeg   |  last reply

drupal to community website with multiple logins and protection for multiple users from robo spamming.?

drupal to community website with multiple logins and protection for multiple users from robo spamming? How would it be done with the least stuff added to drupal 7.9? I know their are plugins are they nessisary? WHat level of functionality is in the basic drupal install and what is the minimum needed to be added?

Question by josheeg 

Old Tv Speakers and Subwoofers

I have an old sansui tv, but ijust want to use its 2 speakers and 2 subwoofers, i means to convert it to only sound system, please help

Topic by dpokharna   |  last reply

Raspberry PI

Hi,I would like to ask you information if with Raspberry Pi, are able to use and check electrical voltage? If if the voltage decreases, it turns off a device.thank you very muchEmerson

Question by EmersonFerreira   |  last reply

How do you publish changes to already published instructable?

I noticed a few spelling errors that I wanted to correct.I brought up ible, clicked edit - made the appropriate changesclicked on save - then clicked full preview - everything looks great....I log back in, click on my profile pic, click on instructablesmy current instructables showI click on the one I just edited - and the edits don't show - I click on edit and they are there.Is there something else I'm supposed to do???

Question by ggallen103   |  last reply

Need help to power an LCD

So recently i salvaged an LCD from my broken head unit. It is a 6.5 inch screen i think. I really want to put it to good use because it is still in perfect condition. It even came with touch screen (it is pressure sensitive but meh at least there is something). Maybe someone here can help me to get picture to come out of the screen. Maybe a control board or something that have hdmi or vga input. I have included a pdf file about the screen :) Everythig should be there. Thanks in advance!

Question by piece of potato 

My arduino bluetooth car is not working, how can i fix it?

I have made bluetooth car using arduino but im having a problem using bluetooth serial how can i fix it here are the code that i have written #include AF_DCMotor motor1(1,MOTOR12_64KHZ);//running motor on full speed of 64Khz AF_DCMotor motor2(2,MOTOR12_64KHZ); int led = 13; void setup() { //Put your setup code here, to run once: Serial.begin(9600); motor1.setSpeed(255);// default speed motor2.setSpeed(255); pinMode(led,OUTPUT); } void loop() { //Put your main code here, to run repeatedly: if(Serial.available()>0) { int incoming=Serial.read(); if(incoming=='f'){ motor1.run(FORWARD); } if(incoming=='b'){ motor1.run(BACKWARD); } if(incoming=='l'){ motor2.run(FORWARD); } if(incoming=='r'){ motor2.run(BACKWARD); } if(incoming=='o'){ digitalWrite(led,HIGH); } if(incoming=='c'){ digitalWrite(led,LOW); } } }

Question by Tkt creative 

In over my head - pH automation

Hi all,I'm in need of help. Due to my previous jobs and general knowledge a friend has asked me if I could build an automatic pH regulation system that will monitor and maintain two tanks (it sounded easy to me at the time) but I've suddenly found myself out of my depth.Having spent long evenings searching on the web and on here, I've seen a few builds of monitors and a couple of dosing systems but none are just what is wanted as they are only set up for single tanks, or not combined into an auto-doser, or too "over-tech'd" or multi-purpose orientated and I don't have the knowledge to adapt or alter things to my requirements. Plunging straight in at the deep end with no real idea of what I'm doing and can actually be done, I'm thinking I should be able to (theoretically) assemble and program an Arduino controlled system, with the one box doing the job of monitoring and regulating both tanks independently, so two sensors, pumps etc., from what I gather it's by adding different boards to the base unit (I did say I know nothing). I don't need wifi or anything like that, just a simple device with a basic display showing the current values that will sit there and just do the job.I think I have the capability to actually build and program the thing having a background in electrics and a little knowledge of relay control systems - not electronics, I start getting lost just after the transistor/diode level and BASIC is more my programming level (yes, I may be THAT old, but I'm still trying to learn), and so what would really help me is if anyone out there can point me towards a site or pages where I can find the info I need, hopefully that doesn't assume years of prior experience, to either build or adapt something to what I want, or even aim me towards someone who could be able to supply me a design and components list, either for fee or free. Cheers!

Topic by hobbit590   |  last reply

Using Arduino For Communication Device?

Hi there, I'm currently working on a University project for my Final Year and currently have some proposed ideas for a social device which can be worn or attached to clothing. My plan is to create a device which sends messages or other information using a sender/receiver which then stores the information, ready to be read later either through USB or simply viewing it on the device itself. It may even work in a similar way to another, similar project I have found on Instructables (see below). The user would simply wear this item of clothing in a specific environment (such as a nightclub - speaking hyperthetically) which would allow communication between people just by walking past another person with the same device. Think of this as a close-proximity, P2P-type device for communication. https://www.instructables.com/id/Arduino-Lilypad-Interactive-Passion-Sensing-Scarf/ I have talked the project over with my peers and found that there are two main options to creating such a device, which are: - Use several Arduinos (one for each user) which send and receive information via RFID Readers/Writers (again, a set of each for each user) attached to the board. One problem with this is that it will be incredibly bulky and unlikely to survive being washed or put through the punishment that clothing often takes on a daily basis. - Use a central Arduino board which receives information from Arduino XBees which receive information from the central Arduino and are sent information back from it. One problem with this is when several devices come into contact with each other, the central Arduino will be unable to tell which message has come from and should go to another device. However, one plus point with this is that I've heard XBees (Series 2 only) will be able to send and receive information on their own and are incredibly small. If you have any ideas on how this device could be produced or if you have any comments on the above, please let me know. I would greatly appreciate any feedback you may have. Cheers, KugarWeb.

Topic by kugarweb 

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

Arduino UART communication quandary

I'm trying to hook up a 5v Arduino to a 3.3v datalogger. I just realized that in all the time I have been messing around with micro controllers, I have never communicated serially to a device that wasn't 5V. I was about to just wire the two devices together when I thought better of it and figured I should look into the matter a little further. Can I just directly connect the RX pin on the 3.3V device to the TX pin on the Arduino? Or do I need to add a resistor in-between? Or a voltage divider? Actually, that wasn't all that many questions. Basically, I'm just wondering what is good form in communicating between devices of varying voltages?

Topic by randofo   |  last reply

Implementation of two way communication

Hi, I'm working on a project where we're working on a tele-operated robot and we are looking to include the ability to have a conversation. We would be looking to use earbuds and a microphone on the operator side and a speaker and microphone on the robot side. Does anyone know how to go about implementing this? It needs to be hands free on both ends as the operators arms are being mapped to the robots arms. Thank you.

Topic by ArnoldM27   |  last reply

How to communicate with the SD Module?

 i have run a program on Arduino Duemilanove where the program i got from blushingboy.net/p/SDuFAT/  but there are some error that i do not know how to correct it... please help me to correct the error..

Question by teddycute   |  last reply

Best cheap wireless communication?

Device x has a button and is 25 feet from device Y. Device Y needs to know when the button is pressed and activate device Z, but it has to be cheap and if I have a lot (A LOT) of these sets near eachother they still need to work without interfering with eachother. Best Solution?

Question by snowpenguin   |  last reply

Arduino & Android UDP communications?

I have an arduino running a UDP server program and it works fine. I have been able to confirm it receives data and responds with a string by using an app which sends & receives UDP messages. I am trying to run a UDP client on an android tablet through Eclipse (java). I have imported java.net and java.io and Eclipse does not show any errors with the code. The software seems to timeout after a long period when the following line is executed: Socket mySkt = new Socket("",8888); .......even though this is the IP address and port I am able to confirm through the app. Does anyone have any ideas or very easy sample code to get this to work? Or are there any ways of testing the socket connection? Thanks,

Question by anth_trace   |  last reply

USB-bus-communication with pic18f4550

Hi everbody Im memo Can you help me please? I'm working on a project about USB Communication with PIC Microcontroller(pic18f4550) I wrote the project in mikroC for pic pro v6.6.1 and this is : nusigned char readbuff[64] absolute 0x500; // Buffers should be in USB RAM, please consult datasheet unsigned char writebuff[64] absolute 0x540; char cnt; char kk; void interrupt(){ USB_Interrupt_Proc(); // USB servicing is done inside the interrupt } void main(void){ ADCON1 |= 0x0F; // Configure all ports with analog function as digital CMCON |= 7; // Disable comparators HID_Enable(&readbuff;,&writebuff;); // Enable HID communication while(1){ /*while(!HID_Read())*/ ; for(cnt=0;cnt<64;cnt++) /*writebuff[cnt]=readbuff[cnt];*/ while(!HID_Write(&writebuff;,64)) ; } } and this the USB Descriptor : USBdes.c : const unsigned int USB_VENDOR_ID = 0x1234; const unsigned int USB_PRODUCT_ID = 0x0001; const char USB_SELF_POWER = 0x80; // Self powered 0xC0, 0x80 bus powered const char USB_MAX_POWER = 50; // Bus power required in units of 2 mA const char HID_INPUT_REPORT_BYTES = 64; const char HID_OUTPUT_REPORT_BYTES = 64; const char USB_TRANSFER_TYPE = 0x03; //0x03 Interrupt const char EP_IN_INTERVAL = 1; const char EP_OUT_INTERVAL = 1; const char USB_INTERRUPT = 1; const char USB_HID_EP = 1; const char USB_HID_RPT_SIZE = 33; /* Device Descriptor */ const struct { char bLength; // bLength - Descriptor size in bytes (12h) char bDescriptorType; // bDescriptorType - The constant DEVICE (01h) unsigned int bcdUSB; // bcdUSB - USB specification release number (BCD) char bDeviceClass; // bDeviceClass - Class Code char bDeviceSubClass; // bDeviceSubClass - Subclass code char bDeviceProtocol; // bDeviceProtocol - Protocol code char bMaxPacketSize0; // bMaxPacketSize0 - Maximum packet size for endpoint 0 unsigned int idVendor; // idVendor - Vendor ID unsigned int idProduct; // idProduct - Product ID unsigned int bcdDevice; // bcdDevice - Device release number (BCD) char iManufacturer; // iManufacturer - Index of string descriptor for the manufacturer char iProduct; // iProduct - Index of string descriptor for the product. char iSerialNumber; // iSerialNumber - Index of string descriptor for the serial number. char bNumConfigurations; // bNumConfigurations - Number of possible configurations } device_dsc = { 0x12, // bLength 0x01, // bDescriptorType 0x0200, // bcdUSB 0x00, // bDeviceClass 0x00, // bDeviceSubClass 0x00, // bDeviceProtocol 8, // bMaxPacketSize0 USB_VENDOR_ID, // idVendor USB_PRODUCT_ID, // idProduct 0x0001, // bcdDevice 0x01, // iManufacturer 0x02, // iProduct 0x00, // iSerialNumber 0x01 // bNumConfigurations }; /* Configuration 1 Descriptor */ const char configDescriptor1[]= { // Configuration Descriptor 0x09, // bLength - Descriptor size in bytes 0x02, // bDescriptorType - The constant CONFIGURATION (02h) 0x29,0x00, // wTotalLength - The number of bytes in the configuration descriptor and all of its subordinate descriptors 1, // bNumInterfaces - Number of interfaces in the configuration 1, // bConfigurationValue - Identifier for Set Configuration and Get Configuration requests 0, // iConfiguration - Index of string descriptor for the configuration USB_SELF_POWER, // bmAttributes - Self/bus power and remote wakeup settings USB_MAX_POWER, // bMaxPower - Bus power required in units of 2 mA // Interface Descriptor 0x09, // bLength - Descriptor size in bytes (09h) 0x04, // bDescriptorType - The constant Interface (04h) 0, // bInterfaceNumber - Number identifying this interface 0, // bAlternateSetting - A number that identifies a descriptor with alternate settings for this bInterfaceNumber. 2, // bNumEndpoint - Number of endpoints supported not counting endpoint zero 0x03, // bInterfaceClass - Class code 0, // bInterfaceSubclass - Subclass code 0, // bInterfaceProtocol - Protocol code 0, // iInterface - Interface string index // HID Class-Specific Descriptor 0x09, // bLength - Descriptor size in bytes. 0x21, // bDescriptorType - This descriptor's type: 21h to indicate the HID class. 0x01,0x01, // bcdHID - HID specification release number (BCD). 0x00, // bCountryCode - Numeric expression identifying the country for localized hardware (BCD) or 00h. 1, // bNumDescriptors - Number of subordinate report and physical descriptors. 0x22, // bDescriptorType - The type of a class-specific descriptor that follows USB_HID_RPT_SIZE,0x00, // wDescriptorLength - Total length of the descriptor identified above. // Endpoint Descriptor 0x07, // bLength - Descriptor size in bytes (07h) 0x05, // bDescriptorType - The constant Endpoint (05h) USB_HID_EP | 0x80, // bEndpointAddress - Endpoint number and direction USB_TRANSFER_TYPE, // bmAttributes - Transfer type and supplementary information 0x40,0x00, // wMaxPacketSize - Maximum packet size supported EP_IN_INTERVAL, // bInterval - Service interval or NAK rate // Endpoint Descriptor 0x07, // bLength - Descriptor size in bytes (07h) 0x05, // bDescriptorType - The constant Endpoint (05h) USB_HID_EP, // bEndpointAddress - Endpoint number and direction USB_TRANSFER_TYPE, // bmAttributes - Transfer type and supplementary information 0x40,0x00, // wMaxPacketSize - Maximum packet size supported EP_OUT_INTERVAL // bInterval - Service interval or NAK rate }; const struct { char report[USB_HID_RPT_SIZE]; }hid_rpt_desc = { {0x06, 0x00, 0xFF, // Usage Page = 0xFF00 (Vendor Defined Page 1) 0x09, 0x01, // Usage (Vendor Usage 1) 0xA1, 0x01, // Collection (Application) // Input report 0x19, 0x01, // Usage Minimum 0x29, 0x40, // Usage Maximum 0x15, 0x00, // Logical Minimum (data bytes in the report may have minimum value = 0x00) 0x26, 0xFF, 0x00, // Logical Maximum (data bytes in the report may have maximum value = 0x00FF = unsigned 255) 0x75, 0x08, // Report Size: 8-bit field size 0x95, HID_INPUT_REPORT_BYTES,// Report Count 0x81, 0x02, // Input (Data, Array, Abs) // Output report 0x19, 0x01, // Usage Minimum 0x29, 0x40, // Usage Maximum 0x75, 0x08, // Report Size: 8-bit field size 0x95, HID_OUTPUT_REPORT_BYTES,// Report Count 0x91, 0x02, // Output (Data, Array, Abs) 0xC0} // End Collection }; //Language code string descriptor const struct { char bLength; char bDscType; unsigned int string[1]; } strd1 = { 4, 0x03, {0x0409} }; //Manufacturer string descriptor const struct{ char bLength; char bDscType; unsigned int string[16]; }strd2={ 34, 0x03, {'M','i','k','r','o','e','l','e','k','t','r','o','n','i','k','a'} }; const struct{ char bLength; char bDscType; unsigned int string[15]; }strd3={ 32, //sizeof this descriptor string 0x03, {'U','S','B',' ','H','I','D',' ','L','i','b','r','a','r','y'} }; //Array of configuration descriptors const char* USB_config_dsc_ptr[1]; //Array of string descriptors const char* USB_string_dsc_ptr[3]; void USB_Init_Desc(){ USB_config_dsc_ptr[0] = &configDescriptor1; USB_string_dsc_ptr[0] = (const char*)&strd1; USB_string_dsc_ptr[1] = (const char*)&strd2; USB_string_dsc_ptr[2] = (const char*)&strd3; } the problem is thas when I build the project this message is shown 434 Demo Limit 102 Finished(With errors) How I Can Solve how this problem please?

Topic by MohamadK4   |  last reply

How do you "unjoin" a group or community?

I recently joined the homemade firearms community and realized that the group is focused on highly illegal NFA weapon construction and i want no part of it.   I thought this would be a group of mature law abiding amateur gunsmiths building legal single shot, bolt guns or semi-auto rifles and handguns but based on the few posts I read, this is not the case.

Question by GDC   |  last reply

How is the wearable battery designed to last longer?

The kicker now is that your smartphone holds far more information than a pocket ever did, How is the battery designed to last longer?

Topic by EvaW23   |  last reply

Ideas for making an RC vehicle

Hey, i have recently bought an rc module and controller, i need some ideas for what to make, any rc vehicle. pls give me some ideas. thx!

Question by Irish pirate630 

Instructables - New vs Update Existing Answered

I have a couple of projects I've posted that I've made substantial changes to that I'd like to share. What is your stance on posting these changes as a new instructable vs updating the existing one?

Question by AndrewHoover   |  last reply

Feature page

So after the website's layout has changed the feature page disappeared. I can't even access it from https://www.instructables.com/featured/ . Is it gone forever? It was the best way to follow all new instructables posted here and I've been accessing it for years.

Topic by oliveira.igorm   |  last reply

Push button duration measurement inside FPGA

Hello, I need to measure the time between press and release a button in an FPGA (time between rising and faling edge) and dispaly the time result the seven segment dispaly of the FPGA , I do somethink but it doesn t work , can any one help please or give a program ,????

Topic by mirabelle275 

Home Page Images

The images for "Explore Projects" on the home page never seem to change. Repeat viewers could be excused for thinking that nothing has changed on Instructables between visits.How hard would it be to update the images on a daily basis ... using perhaps a random function?PS: This post is likely to be missed by viewers in other "Categories" and "Channels" as the posting options are too restrictive.

Topic by lingib 

Cannot get recent instructables on all subjects

I used to like looking at what people had done, whatever the topic, but the last couple of weeks it has not been available, the bookmark that used to do it for me just delivers a 404 error. Can this be brought back? I don't want to just browse one subject area.

Topic by stechi   |  last reply

Help - wiring up bathroom extract

Hi all. I am planning on installing a bathroom extract fan. The fan will be ducted to a small toilet and to my shower, this it will be extracting from 2 spaces. I would like to connect the fan to the lights, so when either (or both) of the bathroom or toilet lights are turned on, then the fan will turn on. Would this be possible?

Question by Waynne-EdwardR 


Often a GFCI is too sensitive outdoors. But I've heard that an isolation transformer might save you from electrocution. How safe would an isolation transformer be for running a fan, angle grinder, blower, space heater, etc outdoors? Where can I get one that will handle the amps I need?

Question by Toga_Dan 

An Other One

I have made a Plotter using 2 Stepper Motors from CD/DVD Drives.As so many have been done, not sure if the there would be interest on how I made this one.I have made the frame on my 3D printer, and made a circuit so the motors don't get hot enough to fry eggs on.Here is a video of it in action:

Topic by Palingenesis   |  last reply

Trouble with cover images for Instructables

I have been recently seeing this problem. Whenever I click an image upside down on my phone and edit it to flip to normal, it gets corrected and comes in the correct orientation. After uploading the image on the editor, everything looks fine, even after saving the changes, but after refreshing the page after a while, the cover image again flips upside down. If anyone has solution, kindly look into this issue.

Topic by KushagraK7   |  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

GSM SIM800L Not Sending Value in SMS Alert When Triggered

Hi Team,please i need help in correcting why my code is not sending the current battery voltage value in the sms alert received. Attached is my code and picture of the sms alert received, once the threshold is reached, the gsm module sends an sms to my phone number but it does not contain the value of the current battery state/voltage; it only displays 0.0V in the sms rather.

Topic by jisaac6   |  last reply

Sorting My Favorites

Hi, long time viewer of this site, first time poster in this forum, I was wondering if anybody knew whether there was a way so I could create different files/boards centered around different ideas, so stuff about building musical instruments can all be in one location, and so on and so forth, sparing me the trouble of having to scroll all the way through my favorites just to see what all is there. Someone want to help me out?

Question by jlynn31 

Solid Color Analog LED strip

I just want to make a backlit box with a logo on it. I'm looking for the backlighting to be green. Every single video or tutorial I find on Analog LED strips jumps straight into using a controller or an Arduino. Can I not just use a power supply? Can I use resistors or something of the like to send x amount of power to r, g, or b for the color I want? Is there not just a simple LED strip guide out there?

Question by BillW199   |  last reply

How detect the speed changes of fan using a controller ic?

I have a ceiling fan manual regulator, the voltage output that i got when different speed is 80v,120v,180v,200v respectively in my project i want to detect the fan speed changes. that means if fan is running in 1st speed then user turn into second speed it should be detect(by using in Arduino) .how can detect this?I tried to use a current sensor(ACS712) at output of a regulator then detect the current for different speed..but the variation still small cannot be detectable.

Topic by wounder   |  last reply

Recent Feed Page

We have heard your feedback loud and clear, and we will be bringing back an easy way to see all recently published instructables. This requires some dev time because we changed things under the hood and need to do a little work to re-create this page. We hope to have it back shortly.We appreciate your patience as we continue refining the site after this release.Update:The recent feed has been released and can be found at this link:https://www.instructables.com/feed/recent/You can also find a link to it on your feed page.

Topic by randofo   |  last reply

Use brushless DC motor (or stepper motor) as RPM sensor?

Hi all, I'm making an Arduino based digital instrument cluster for my 1980 XS400 motorcycle. all the old tach and speedo instruments are mechanical so I need to convert the spinning cable's rotation to digital RPM. I've tried IR tachs but I can't seem to get them to be accurate enough (the lowest RPM I could get out of them was about 375, which isn't low enough) I'd love to use a more mechanical means of getting the RPM. could I use a 3 phase DC motor to count RPM? if I can, how?

Question by AedanGraves   |  last reply

Induction Heating large scale

I am working on a project and have a large tank full of product kind of a greasy substance trying to heat up to temp of 180 degrees. the tank currently has a 4 inch pipe running inside wall all around tank for heat transference.. At this location a boiler is not a option at this time . I was curious if anyone ha s ever attempted a large induction heater build one that would encase a 4 inch pipe and heat liquid inside so thermal transfer would heat our product. Sorry for not including all details at this time i just curious if large induction heat was possible or efficient ?Thanks,

Question by andy1917 

​Teachers! Let's Connect!

Hi, everyone! I'm Jess.Before joining the team here at Instructables, I was an Elementary STEM and ESE Teacher, and I have loved art and maker/DIY projects pretty much my entire life. Recently, I’ve seen some really awesome and inspiring projects and noticed that the authors were teachers, so I thought it would be cool to connect here and share what we're working on with other teachers who also love to tinker and make. I'm so excited to learn about what you all are up to and celebrate your crafty, techie, maker awesomeness! :DFeel free to say hi and share about the things you love to create or link to your most recent project in the comments below.

Topic by WeTeachThemSTEM   |  last reply