# Latest Topics

### Retiring the Forums

Topic by randofo    |  last reply

### COVID-19 Adjustments to Instructables Contest Prizes

Topic by seamster    |  last reply

### Welcome to Instructables

Topic by randofo    |  last reply

### Sounss

Hi - sorry to interrupt, but I want to make a Quiet Place type monster costume, so I was thinking of putting lavalier microphones into certain ear spots (the entire costume is a cross between the Demogorgon and Death Angel - with some other creature traits included), and I was wondering how I could make it so the input of the lav mic could be played directly into my ear? I will he otherwise fairly hard of hearing in this costume otherwise I think. Also, eye holes? Anyways I can figure all that other stuff out I just need help with this sound stuff. Thanks!!

Question by PiL71    |  last reply

### I've a problem in my arduino program. why the output in serial monitor everything is worth 0?

Bool;float A;float B;float C;float D;float volt1;float volt2;float volt3;float volt4;int a;int b;int c;int d; void setup (){ if (a, b, c, d >=3.2) { 1;}else{ 0;}Serial.begin(9600);}void loop(){ A = analogRead(A0); B = analogRead(A1); C = analogRead(A2); D = analogRead(A3); volt1 = (A*(4.883))/1000; volt2 = (B*(4.883))/1000; volt3 = (C*(4.883))/1000; volt4 = (D*(4.883))/1000; a = volt1; b = volt2; c = volt3; d = volt4; ((b&&c;)||(a&&c;)||(a&&b;))&&d;//this is a boolean logicSerial.println (a);Serial.println (b);Serial.println (c);Serial.println (d);delay (1000);}

Question by airlanggaal4    |  last reply

### TO CREATE AN ECO BRICK COUNTER FOLLOW THE FOLLOWING STEPS

ECO COUNTER BRICKS a counter to collect materials in a container, through MakeyMakey, and programmed with scratch1. prepare a container to collect materials in this case eco bricks2. create a switch and sync it with makey makey and scratch,3. program with scratch so that when you press the switch you can count each bottle that enters the container

Topic by dani.reyesmoya

### Have solar street light, want to use it at Home for LED lights - Help

Hello guys!I am a bit curious if I can do this. So here is the scenario;We have been powering the cow shed - store room from a regular electricity source (220v 50hz AC, India). Recently somebody told us that this is actually illegal as the shed - store room is treated as separate house in itself.The good part is, we have a solar street light (subsidized by govt of India - costed around 5000 INR/ 70 USD). This is before LED's gone viral. So we have a 2g11 CFL (18 watts) bulb. It has worked quite well so far.Its August, it rains heavily in this part of India. So i have been monitoring the time for which the light stays on. In an overcast day (with no rain), the CFL will power up for 7-8 hours and in sunny day its for 12 hours as there is auto cut-off for the street light once its morning.The battery: 12v 75 Ah solar tubular (Its a C10 battery, nothing was mentioned on the label, had to confirm with customer care). I checked voltage using multi-meter; it was 12.33 volts (I think thats 70% charge??) The solar panel: Max rated power (Pmax): 75 watts; Rated operating voltage (Vmax = 17v); RO Current (Imax = 4.42A); Open circuit voltage (21.5v); Short circuit current (4.65A).I plan to add following load;1) Part A: 2 x 7 watts LED AC bulb (B22 connector, standard Indian) - This will remain on the auto-on-off circuit (as the CFL is now) to replace the street light.2) Part B: 3 x 5 watts LED AC bulb (in the shed) + Emergency 3 pin socket for charging mobile phones (Reason: once it happened that my village had a power issue which took a week to resolve! So no charging phones, which means the other people in city were worried as they couldn't talk to their loved ones back home). LED's for couple of hours. and Emergency socket will run rarely. Here I would need an Inverter circuit to convert 12v DC to 220v AC.Queries;1) Is this doable? My battery will be running out of warranty in another month, is it worth the adventure? ( a new battery costs 75 USD in open market :p)2) Is it technically feasible to have this load for the shed? Is the solar panel enough to charge the battery to support this load? I think it can pull it off. But still need an expert opinion. 3) Any recommendations for the Inverter circuit? I will search its equivalent on Amazon India. I also have a car inverter (200 watts) which i used on long drives to charge laptops and DSLR camera - hence this idea of adding an additional inverter circuit. Wont be sacrificing this car inverter, hence a new circuit. Is this feasible?4) Is there any way to power Part B from solar panels in day and battery at night?5)Any other thoughts/ inputs for this project? Thanks and Regards,Vikas M.

Question by vic86m    |  last reply

### Any Ideas? I want to make a Smart Mat

Hi! This is my first topic here!I am thinking about starting a project but I'd first like to know if anyone has better ideas about how to make it.I want to make a "smart mat" - a mat that, when it senses pressure (in other words, when someone is stepping on it) it send me a notification. Does anyone have any ideas on whats the best way to make it? I was thinking on maybe use a smart door/window sensor and somehow change its state when someone steps on the mat.If not, maybe use an arduino but I don't know what kind of sensor I could use or where to buy it...Thank you!

Question by joaohess    |  last reply

### Vmix wifi arduino tally

Hi,did anyone made arduino wifi tally system?

Question by JuricaB

### Air Purifier Ionizer

Like to get it's kit for assembly and test it's effect

Topic by Kesavkesav    |  last reply

### GPS: STM32L010K4 Hardfault_Handler at STM32L0xx_it.c:0x800067a

Dear fellow human being,I am working on a project wich uses the STM32L010K4 microcontroller. We implemented the chip on a PCB and we can write pins high and low and we’re able to use SPI. This project revolves around a GPS application. We’re trying to use the UART protocol with the stm32CubeMx IDE. We’re also trying to make some large/complex computations, I read online that this could potentially lead to stack overflow. I also read the datasheet and the uart is and spi are part of two different alternate functions. This is the message we get when trying to implement uart.With kind regards, Reinier

Topic by raygz1    |  last reply

### What is this made in Germany

Question by upeniece.liiga1990    |  last reply

### Person Following Robot Ideas

Hi, I am building a robot where i want to follow me, I made a part with GPS, it gets my coordinates from mobile and drives to towards me, but this has some issues like:1. When you are close to robot, GPS accuracy is not good. my robot has accuracy arround 1.5m, while phone has arround 5-6m accuracy, total 7-8m accuracy is not very good.2. GPS doesn't work indoor.So I am tying to find a solution that for two cases:1. in outdoor, when robot get closer it may switch to another option instead of GPS to follow me, camera or some sensor. I saw cameras like HUSKYLENS where you can track face and objects easily but I don't know if this will work to track person from behind without seen face directly. There was some options used Ping sonar's to track.2. indoor, where i think if I find a solution for outdoor, it will work in indoor also. I prefer to use HUSKYLENS lens but its bit expensive for me to order it, I am trying to get sure that this might work. In this link there is one simple example, which works very nice. https://www.youtube.com/watch?v=y5ftBT3Swdw

Question by GürhanÇ    |  last reply

### Building BCI

Hi folks!I am 16, and I want to build a BCI that the paralyzed use for controlling a robot. I have watched the most courses series on YouTube. But I still feel lost and I don't know where to start. I want the project to end up successfully. Ie when the user wears a headset and he/she wants to drink, the robot gives them water and so on. What kind of brain signals should I use. What steps should I take in order. I don't want the project to take years. I wand to end it as soon as possible.Thanks!!

Question by Sarah20201    |  last reply

### Mouse mods question

Hi there, I have a question regarding the connection port inside the mouse (Dell). It shows d+(green wire), d-(white wire) , s(black wire), v(red wire), and g (empty no wire). See attached photo. I'm trying to add a timer to it and I need to add a wire to the v(red wire) and a wire to the ground, but my question is there is no wire that currently goes to the ground inside the mouse so where to I add my ground wire? In the empty slot? Or to the s(black wire, usually the ground) is it considered to be the ground? What does s(black wire) mean? Thank u for ur time

Question by sanchezas    |  last reply

### 4p 18650 power backup using TP4056's with protection

Hi Everybody, I need help with project I am up to so any advices would be much appreciated. Setup: Laptop power supply 20V 3A 4x TP4056 with protection 4x 18650 lion cells of different condition 4x P-MOSFET 4x Schotky diode 4x 1k resistor 1x step down module 1x step up module Task: Want to build 18650 cell charger (backup power supply) using 20V power supply and charging circuit with TP4056 in parallel. Goal: Should be able to run constantly connected to main power supply being able to simultaneously charge the cells (and cut them of while fully charged) and supplying power to the load. For the input I plan to use step down convertor to get 5V (for parallel connected TP4056 chargers) and for output step up convertor to get 12V for the load. I did a lot of research already, therefore I incorporate P-MOSFET, Diode and 1K resistor to not to disturb the precision of the charger and prevent the drain of the cells once charged. I also draw the circuit how I think it should be done. I am new to this so I will appreciate any input, correction or alternative to this. Whole idea is to be able to charge cells which are unmatched without balancer and being safe. I am not sure if the TP4056 protection would serve sufficiently for this. Also am interested how much would be maximal possible current output. Plan to use Samsung IRC18650 24b cells at the moment which I salvaged from my old laptop battery.

Question by pavelkryml    |  last reply

### How to program IC v9881d to make energy meter (KWH)?

I want to make a single phase electrical energy measurement module using IC V9881D. After learning a little about the IC, it turned out that the IC had to be programmed before it could be used. I don't know how to program the IC. Does anyone know how to program the V9881D IC so that it can produce voltage (Volts), current (Amperes), power (Watts), and single-phase electrical energy (Kwh)?

Question by de ap    |  last reply

### Trafficlights

Hello. I try to program an Arduino-sketch for cars and pedestrians. I have already made a begin to this sketch but there is an error in it.The sketch is attached to this topic. In line 16, the 'sensorValue' is not decleared. As i am a beginning programmer, i have not found a solotion yet. Ho can tell me what to give in to this sketch to make it run?Already thanks for answers.

Topic by pascaljansen1    |  last reply

### Ventilator sensors

Hi guys It's for a ventilator (open source ) project So I want to modify some stuff & Kinda upgrading the app So my probleme are in sensors ( pressure sensor , airflow sensor) For the pressure sensor I decide to take this one: https://www.amazon.fr/capteur-pression-num%C3%A9rique-contr%C3%B4ler-liquide/dp/B07L3W7ZX4/ref=pd_aw_sbs_60_1/260-6246725-4613710?_encoding=UTF8&pd_rd_i=B07L3W7ZX4&pd_rd_r=42b40455-3d50-4ccd-87af-ee019666e36d&pd_rd_w=VrwYG&pd_rd_wg=CudOO&pf_rd_p=15678560-0024-4e81-8430-a45dacf37d9a&pf_rd_r=8XBAXNN7E6SHH9MCYB8Y&psc=1&refRID=8XBAXNN7E6SHH9MCYB8Y The range of pressure needed(0- 5 pka) is fine (0-40 pka) But the problem is the airflow sensor.. (0- 20/25L/MN) I thinker about water flow sensor (0-30L/MN) {YF-S201} That's will be work??? If no please give me some advice or , kinda of sensor that I can use for measuring the airflow The porpus of all that it's to make an graphic , like monitoring of the ventilator Best regards

Question by Snake00012    |  last reply

### Naruto Fans!

Naruto is the BEST anime! Any people who wamt to talk about Naruto Chat here!

Topic by Anime Otaku JG    |  last reply

### Suggested Prizes

Stay with Amazon Gift Cards - these are great!

Topic by bmohnsen

Hi every body In this video I make an electromagnetic drill standFor this project I’m using two microwave transformers one psu 350 watt from old pc, epoxy resin. Aluminium swarfs, some pieces from steel and one piece of bronse. I hope you enjoy the video !https://www.youtube.com/watch?time_continue=123&v;=J9I3FJ8dROk&feature;=emb_logo

Topic by versam    |  last reply

Topic by Downunder35m

### LED flourescent tube replacements

Hey all.I scored some cheap LED drop-in replacement tubes and intended to get some old fluorescent light fixtures up and working again.Unfortunately the fixtures' ballasts seem to be bad -- which I suppose is no great surprise since they were taken out of service for a reason.My question is, even though the LED's I've got are intended to be used with a ballast, can I simply wire them directly?I don't see that a ballast does anything to the frequency/voltage, and according to Wikipedia its purpose is "to stabilize the current through the lamp, and to provide the initial striking voltage required to start the arc discharge". LED's shouldn't care about any of this.Or is there something I'm overlooking?

Question by PS118    |  last reply

### Tesla's "Earthquake" machine - revisited!

Topic by Downunder35m    |  last reply

### Is it possible to upgrade an old LED grow light by simply upgrading the chips/diodes in the light?

I have a couple of old cheap LED grow lights I don't use anymore as I've upgraded to more modern lights however I don't want to toss them out as they could come in handy as a spare or useful should I require a new grow space.I was wondering if I could upgrade these old lights by purchasing new full spectrum (or whatever) chips/diodes (about .80c per Epistar from China) and simply solder out the old cheap 3 watt diodes from these old grow lights and solder in new 3 watt chips to make a 'new' and better grow light for around \$40 (as I'd be using the fans and all electrics of the original grow light).I have no electrical knowledge so is this even 'doable' or just a thought bubble?

Question by PYak    |  last reply

### Research on makers and modular design

Hi maker community! I am conducting a survey as part of an investigation by the University of Zaragoza (Spain) about makers and modular design. Would you be so kind to do it and collaborate in the dissemination? The more answers the better!https://forms.gle/fhvKwVbsEUo78Dkd7Thank you very much for your help! :)

Topic by lauraasion    |  last reply

### Info on ring I found?

I found this ring while rotottilling the yard and would like to know anything about it. Any information would be greatly appreciated.

Question by raypalmquist    |  last reply

### Maker Resources for High School Students

Hello! My name is Anthony Tan and I am the Founder of the Maker Hub Club Initiative, a non profit project that supports communities of high school student makers in the U.S. https://www.makerhubclub.org/ If you are a high school student in the U.S., I would love to help you make projects by providing resources and funding. Please let me know if you are interested. You can reach me at makerhubclub@gmail.com

Topic by rockcacti

### Alloys with a low melting point - not just for fun and magic tricks!

Topic by Downunder35m

### Where can i get a 1/8 inch sheet plastic for cheep.

Where can i get !/* inch sheet plastic for cheep. I am looking to make a custom bike fender. does anyone have any advice?

Topic by estherD135    |  last reply

### Is there a list of... creators on here somewhere that sell what they make?

I get that this place is meant to teach us how to make these things ourselves, but you also have to know a lot of tech, or have a space where you live to DO things like solder etc... I’m so frustrated when I see such amazing tech on here and want to buy it as an addition to my nerd cave but no one even seems to reply and just say, “No, I’m too busy even during a pandemic to make what is for me, like building a Lego set but for you is like building a Rover for NASA... from your wheelchair, BTW” I’m a nerdy guy who collects stuff from Showbiz Pizza and Chuck E. Cheese, like a couple of animatronics that run via their computer and can also be programmed to any mp3... Neon signs, posters and probably the largest collection of the animatronic shows media than anyone else(I said I was nerdy) but that includes asking their former CEO, Dick Frank, to borrow several of their SVHS masters to copy to DVD, just so that the community could finally close gaps in shows we didn’t have yet and up until 2010 had alluded us... So, I’m just trying to I guess find out, is it illegal or no allowed on here TO sell and I just missed that and if so, and you want to sell privately... please PM me if you sell, period! I mean, even wealthy people like money.

Topic by PizzaCam2020    |  last reply

### Does the magnet motor really work and keep spinning?

Topic by Downunder35m

### Stylus digitizer suggestions for diy drafting table?

I want to build a drafting table with a glass table top and a screen behind it. That way I can do things like:1) display reference images while I work on art2) trace things from screen onto paper3) toggle the screen to 100% white and use as a backlight4) draw shapes using traditional drafting tools and have them digitized. (Think of using triangles, compasses, and whatnot to draw on a Wacom Cintiq)It's that last thing that has me scratching my head. What are some affordable options for a fairly large screen with stylus (and possibly touch) capabilities?Will it work behind thick tempered glass?Should I / can I make my own digitizer?

Question by PS118    |  last reply

### Forums are retiring - I am building a replacement-forum

OK... As many of you may have heard, the forums here @ Instructables are closing permanently this october. See https://www.instructables.com/community/Retiring-...This may have its cause and it is all explained in the linked post. I want to thank the instructables-Team to have provided such a great community over all these years. I learned a lot and enjoyed reading all those posts and answering those questions asked. I may even have had a positive influence on someones live. Who knows?Anyway: I dont aggree with the result of the analysis that there is a falling # of posts and activity in the forums here. I think it was more a self-killing system with bad & old Forum-software not motivating for new users and new posts. This in return gives low activity and low incentive for staff to update the forum and make it more appealing. Less appealing forum = low user-acitvity = low staff-incentive = Less appealing forum = ...I still think there is a big benefit for a dedicated forum for DIY and instructables. But ranting does help nobody. It is a free world and Instructables / Autodesk have made the decision. OK. Lets see what we can do from here on.I quickly grabbed a Domain, booked a webhosting and set up a rudimentary phpBB.-->> http://diy-forums.net/ <<--Currently, userregistration is disabled. If you want to help out, please dont hsitate to contact me here om Instructables via PM. Soon we will have the structure and details and rules fleshed out and will be opening the gates.Someone has a nice idea for a logo?

Topic by Orngrimm    |  last reply

### Ancient technologies revisted - the last chapter, 13

Topic by Downunder35m

### Removing acrylic paint from a reused, painted canvas

About a year ago I got started in acrylic paint pouring. At the time I had decided to paint over some of them but I regret this now and wish to removed the painting I have done over them. The original paint pours were sealed with a spray on clear coating but not the painting that I did over them. Is there any way I can remove the over painting without damaging the original paint pours? Any recommendations for solvents/tools or experience with this? Thanks for your feedback!

Question by Markski    |  last reply

### Como construir domos

Donde puedo encontrar un manual para construir un domo de 3metros de radio. quisiera saber las medidas que debo utilizar

Question by joseluis2399    |  last reply

### How can I make gear shafts/axles without using power tools ?

I have a few gears that I want to 'connect' together into sort of a gearbox. Motor > small gear > large gear. Found a bunch of scavenged gears and bought plastic gears off aliexpress, but I am struggling to find shafts that would fit snugly inside the gear. Any ideas how I can make my own shafts ? The only idea in mind is to wrap pen refills with aluminum foil. Which seems okay. But not sure.. I do not have access to any power tools. Overall I am trying to make a curtain puller, for which the motor does not have enough torque. So making reduction gears to slow RPM, increase torque. At least that's what I have in mind. Not sure if I am on the right track. Thanks a lot! ~ love instructables

### Learning electronics

I’m looking to learn more about electronics. Making circuits and stuff. Does anyone know a good way to take classes. I know I want it interactive. I want to be able to ask questions. So I can really learn the subject. I have done the basics here. And I watching utube. I find both very limiting. Any thoughts is appreciated

Question by Cumberson    |  last reply

### Building an inground swimming pool below the waterline.

My daughter and her husband are building an inground swimming pool. They've dug the hole, but the bottom is below the waterline, and the hole keeps filling with water and mud. They've tried building a temporary dam from river rock and landscaping plastic, but are still having problems.Any advice?

Question by Youngner1    |  last reply

### The great Covid-19 and 5G conspiracy - I am soo sick of it!

It has to come to my attention that here in Australia and in many other countries those behind the worst conspiracy stories of all are now building up forces.Mind you I really have no problem with conspiracy theories!I actually quite enjoy them, making my own thoughts and conclusions, sometimes even write some on my own.But what goes on now with Covid and 5G just isn't anything to tolerate anymore!We have groups and websites openly calling people to not only do stupid things but to openly run against the law, regulations and everything in regards to authority.You don't want a 5G tower near you home?Well why didn't you say so when it was proposed and the public informed to have a right to respond and provide concerns?No you wait until you see a company worker doing his job to abuse the crap out of him.Why?Not because YOU made this decision based on facts or because you think it is right.You just did it because someone told you it would be a great idea and that people who do would be celebrated as heros.You were USED.Same for stating that you don't need to wear a face mask and can do what you like while those around you fear infection.It is true that we all have rights, that police powers are not unlimited and that we all SHOULD be allowed to do as we please.It is also true that it seems to make sense in our modern world that individuals have more rights than enitre communities.But there are limits, not just those dictated by common sense.You favourite conspiracy theoery might provide all the excuse you need, those running it even all the legal texts you have to cite....What they won't tell you for obvious reasons is how ALL those cases got overturned!Either in higher courts or just by actually stating the facts and chain how our law actually works.You have one one real right, let me try to explain in case you are one of those conspiracy nutcracks:You were born into a world where you are just a tiny piece or great puzzle.The rights the country you are living in provides you are based on following the rules.Do you tell your kids to NOT listen to the teacher because you think the guy is telling your kid crap?If so then how do you explain to your kid properly what would be correct and justify this against everyone else?The world is just a flat disk, I know...You don't like the laws, the regulations? Fine with me, I don't like many of them either.Does not mean I go out there for fun trying to break them or make a useless and totally meaningless point if those things won't actually affect me.Especially not if it means making a fool out of myself.You wouldn't go into the Manchester United section of the stadium during the final just to shout out how you hate the team...Why? Because you would know you won't make it out in one piece or without the need for an ambulance.But taunting a cop in the same fashion seems to be fine because you know he or she wouldn't touch - or so you think.You only real right if you simply refuse to fit in is to leave.Africa has lots of open spaces where you can settle and start your own life free from supression....But you won't do this, you won't leave, all you want it being stupid, being a problem without providing even a clue about a solution.You want YOUR rights without giving those around ANY rights or choice - what exactly does that make you?

Topic by Downunder35m

### Need help Arduino DC motor

Hi guys , I need your help How to build a diagram & Arduino program to control a DC motor (9v I think) datasheet required & The program from the Arduino to Run the motor for 3 second (clockwise)stopping for 2 second & finally turn for 3 second in the other sens All that is a cyclic mode (8 seconds) at all Thanks

Question by Snake00012    |  last reply

### Newbie begging for help! Making a PWM LED lamp with 0 experience

Hi there!I'm currently entering my 3rd year of my psychology undergraduate degree and for my dissertation I'm doing research into a study done a few years ago. I'm making a lamp to see if it helps reduce optical distortions in dyslexic readers (super cool!).My problem is that I have 0 experience with anything like this, but I'm very much willing to give it a go and learn, i've looked up some instructables on making LED lamps which I can get my head around fairly easily, the issue comes in when I try to incorporate pulse width modulation as the tutorials there are more geared towards people more advanced than myself. So this is me begging for any advice or resources you can recommend to me that are newbie friendly - any sort of suggestions are greatly appreciated! :)I've put below some of the details about the lamp and what it requires. The lamp should be able to alternate between 2 settings: A constant illumination setting, in which it should be constantly 200 illuminance (lx) A pulse regime setting, in which there is a 80 Hz pulsed regime, with a duty cycle deltaT/T = 0.2, no visual flickering.Replaceable batteries Large enough to light up a sheet of A4 well

Topic by jenniferhinchy    |  last reply

### Can you use a remote control in place of a motion sensor?

Checking to see if you are able to change out a motion sensor in a talking parrot toy to activate it using a remote control? If so, is there an appropriate wiring diagram to follow in order to complete this? Any information would be greatly appreciated.

Question by dde60    |  last reply

How to read the data sent by the rc transmitter to the radio frequency tx modules (example frsky djt) what type of data the communication outputs and how to read this data with an arduino the goal would be to use the arduino with a nrf24 module to create a tx module and then create a receiver also with arduino and nrf24 the idea and use the industrial rc transmitter and its many features but with cheap home receivers for simpler projects that do not require very advanced receivers

### Model Railways Forum

This is the forum for modelrailway lovers at instructables! Questions, Ideas, and all the things ,all scales , real or model are welcome to here!

Topic by simaopintocorreia    |  last reply

### Arduino

I have these products (High Speed Closed Loop Stepper Motor + HBS57 Stepper Driver) and i think i will need arduino panel (i dont know how they call it). Can you help me ?

Topic by TheDevilOfHeaven    |  last reply

### Safely washing Denim

Hi, I just recently completed a project of mine. I drew on my jeans with Sharpie Laundry marker, and I used another fabric marker as well. I was wondering if anyone knew how to safely wash my work without it fading or getting ruined?

Question by Catsbulbasaur