How to convert analog MQ4 sensor output to ppm

Hi everyone,  My final year engineering involves a rover that can sense methane gas. Initially the idea was to just detect the gas as digital input but now i wanna do a bit more. I've searched all over the internet on how to convert the analog values to ppm, but couldn't understand any of it. I'd be really great-full if someone could give me the formula or the code to do this.  I don't intend on calibrating the sensor to find precise answers, just a rough picture of the ppm values is enough to begin with. Thanks a lot in advance. 

Topic by ZeeshanA27 3 years ago  |  last reply 11 months ago


Mosquito Flamethrower

It's a DIY mosquito flamethrower for when you want to go nuclear on the little buggers. What could go wrong? Link

Topic by fungus amungus 9 years ago  |  last reply 11 months ago


Graduation card box ideas

I know this is more craftsy but I'm trying to find ideas for my son's graduation party for making a card box, a place where guests can snap a picture with props and that kind of stuff. Any ideas & input are appreciated. I checked Pinterest but nothing caught my eye.

Topic by DUMB8 11 months ago  |  last reply 11 months ago


How can i get my PC to detect a WIFI signal again?

About 3 weeks ago, I was trying to update from win10 v 1709 to Win 10 version 1803 but I couldn't finish because the signal for this particular WiFi at the Lodge became so weak all of the sudden. Actually, the lodge has two routers- one with the excellent signal and the other with a very weak signal. What surprised me is that my android phone detects the signal immediately I enter the lodge premise but my PC won't. This WIFI network only shows up on the available networks for a few seconds and it disappears for hours. Sometimes I get lucky, it comes on and connects automatically but limited service. So I think my PC has a problem and not the router. Any help please. I'm stuck here for like 3 weeks, school work isn't easy to do anymore. I've atrached pictures from which u will see what Im talking about. I'll appreciate your responses.

Topic by Kale Vioe 11 months ago  |  last reply 11 months ago


Arduino alarm clock help!

Hello I am trying to make a pressure switch for my alarm clock where when I stand on it for a certain amount of time the alarm will stop. I've never done any arduino work before so I was wondering what board would best suite me for this project. I found this one but I don't know if it will work. https://www.gearbest.com/development-boards/pp_629... I also found some code online that I think would work. Here is the link for the code: https://arduino.stackexchange.com/questions/1193/a... Also would this be how I would set the entire thing up?Do I need any resistors? What type of power supply would I be able to use?

Topic by boom man56 1 year ago  |  last reply 11 months ago


Reformatting bugs

I just published an instructable but I'm dismayed to see the autoformatting has made it look pretty rotten. Steps 2 & 3 have wide aspect ratio images and they have been cropped and rendered in very low quality. The autoplay youtube function (where you can make a youtube video look like a gif) no longer works and the aspect ratio chosen seems to be ignored, so you get the black bars even when you do hit play. Any chance this cropping/breaking can be fixed? Thanks.

Topic by makendo 12 months ago  |  last reply 11 months ago


Help me please for to download pdf

Help me please. I would like to download the pdf files https://www.instructables.com/id/IoT-Raspberry-Pi-Video-Streamer-and-PanTilt-Camera/ and https://www.instructables.com/id/IoT -Controlling-a-Raspberry-Pi-Robot-Over-Internet / but not able to register premium account files need urgently pogmogite please

Topic by АлексндрЛ 1 year ago  |  last reply 11 months ago


THANK YOU INSTRUCTABLES!

I just want to tell all you workers at instructables how happy I am today! The package came and I went crazy! Everything was so awesome I just wanted to let you know how grateful I am for this experience! Again, thank you and keep being awesome! With many thanks, Mrwonton (•o•) Ps... the little instructables robot pins are SWEET!

Topic by mrwonton 11 months ago  |  last reply 11 months ago


How to install an LED on/off Indicator to Monitor 24v AC line?

I want an LED indicator that will lite when an AC circuit is on. The line/output is 24vAC at .5A. This is an irrigation controller, which sends 24vAC to activate a water/sprinkler controller valve.   I need a basic cicuit design and/or instructions. Googling led me to the 3 pages below, but I am not sure what to do. Any advice appreciated.  Thank you. http://www.boat-project.com/electro/panellight.htm http://www.discovercircuits.com/DJ-Circuits/aclinepilotled1.htm http://www.electro-tech-online.com/datasheets-manuals-parts/41821-1n4004.html

Topic by 222fbj 8 years ago  |  last reply 11 months ago


I want to learn coding

Who can teach me coding from the basic with the necessary tools I need?

Topic by andyj82 1 year ago  |  last reply 11 months ago


Where can i find all my favorites?

This might be a dumb question, but since the new update only a few of the projects that i have favorited are showing up now? Where can i find all the other projects? i go to my profile and choose favorites and there are only about 20 or so of the many, many that i have starred. Hopefully someone can help with this issue, Thanks!

Topic by SamuraiFinn 2 years ago  |  last reply 11 months ago


D.I.Y. Automotive Black Box, DVR, OBDII

Friends, I am a noob that is considering building a Black Box for my car, I suspect that I am not the first so please if you know of discussions on developing an awesome Black Box please direct me to it. The Black Boxes being offered are Gold Dusted empty, expensive crapware. I want added protection from bad drivers, bad insurance companies and bad cops so I want six or more 1K or better cameras and DVR with the ability to store on any size SD card and/or SSD. I also want telemetry from many sources like GPS, speed, throttle and brake pedal positions, steering degrees, OBDII and more. Two problems I suspect will be power drain when the car is parked and chip cooling. I'd like to Stink Tank this idea with interested peeps (WOW! I always wanted to use Peeps, yeah, I know Late) I look forward to hearing from you Sincerely

Topic by XJohnD 1 year ago  |  last reply 11 months ago


Crowdfunding campaign MAKER @MIT | #FromMakerToEntrepreneur

Dear MAKERs community!My name is Dmitrii, I am also known for the Grow It Yourself (GIY) projectToday I launch the crowdfunding campaign #FromMakerToEntrepreneurThe campaign is aimed to raise funds for EDUCATION @MIT I strongly believe that this huge community that we have built together can have an impact! The support & share is truly appreciatedhttps://www.gofundme.com/FromMakerToEntrepreneur/Thank YOU in advance!

Topic by dymonxd 1 year ago  |  last reply 12 months ago


Li-ion 5 pin, pinout?

Good Day Fellow TinkerersI have a battery that came out of a Android Tablet that i want to use for another project.It has a cuircuit board attache to the top which i would assume is a over/under charge protector and it has 5 wires coming off of that. 2 x Red, 1 x White and 2 x Black.The two black wires are connected to the same pad on the "protection circuit" and the two red are connected to the same pad. The white wire is on a separate pad i.e. 3 pads, 1 with 2x red, 1 with 2 x black and 1 with 1 x white.I figure the Red would be positive and the Black negative and then i would assume that the white is the Thermistor connection.My Question :How do i connect this externally from the tablet to charge? I figure red and black are the usual, but how do i connect the white wire?Thanks in advance for any help :)

Topic by GhengisKhan1981 12 months ago  |  last reply 12 months ago


alternative ignition of thermite

Allright im looking for information on a number of different ways to ignite thermite. sure we've all heard of magnesium and yes it's usually third or fourth time is the charm also potassium permanganate which is pretty cool too and the ever popular sparkler of course lots of companies have taken out the magnesium chlorates and perchlorates from these sparklers and are now selling crappy ones without hazmat fees for them so they don't work worth a crap. i read an article from a guy stating he used simple visco fuse to light it even though ive heard it won't work but perhaps it depends on the mesh as in much finer. i use the dark german aluminum about 625 mesh and it will coat any and everything it touches. really though guys let's come up with some ways to lite thermite outside of tradition and share these methods of doing so along with how to obtain materialsin conventional and unorthodox ways because without frst time reliable ignition it's just no fun. also the first fire mix, much like the thermite ignition mix at united nuclear what exactly is it made of and how are some ways the monetarily cahllenged can obtain it and of course the not so challenged.

Topic by pyracantha 11 years ago  |  last reply 12 months ago


Credit Card Offers and Free Credit Score Reports: Help RocketScientist2015 go to college by doing something you were gona do anyway!

Well, I've fallen from from the ranks of mostly unemployed to be an affiliate marketer:Next time you are looking for a credit card, or a credit report, mosey on over to ApplyForSomeCards.com and browse my selection of offers from major credit institutions. It's secure because I don't take your info, you just tell me what you are after and I show you offers from financial institutions (Visa, Mastercard, American Express, HSCB, the works). All you gota do is find the credit card that you need, and click to the issuer's site. I don't cost you anything, I get a commission for hooking you and the financial institution up. Also I've got links/offers for financial counseling, debit cards, pay day loans, credit repair, and all sortsa junk like that. Don't worry about them to much, they don't pay me as much so screw 'em. So yah, that's the scoop. And yes I'd appreciate it if you mentioned my website to friends and family, 'cuz I've got college to pay for in a year or two. And they say what goes around comes around. I don't know how that applies here so... err... Live Long and Prosper Y'all.... and recklessly apply for credit cards brought to you by: http://applyforsomecards.com/I'd really appreciate it!!RocketScientist2015,not a spam'in robot, but in fact the real him

Topic by KentsOkay 10 years ago  |  last reply 12 months ago


I no longer have a Favorites Button.

Instructables pages appear to have a new layout (at least the header) and I no longer have a Favorites Button. I use the latest Chrome. Maybe I missed a update or feature change; so, I need to know have to Favorite something.

Topic by gpetrie 1 year ago  |  last reply 1 year ago


It would be nice...

It would be nice to see the full name of an instructable when you hover over it's title. Just an observation. Thank you.

Topic by Lord_Vek 1 year ago  |  last reply 1 year ago


Web Site Improvements

Thank you for adding the "More by the author" profile banner to the top of each Instructable. Three author-instructable images used to appear in the right-hand panel along with some recommendations but disappeared with the last site upgrade. The new location at the top of each instructable is a nice touch ...Thanks also for restoring the graphical "Launch Stats" ...

Topic by lingib 1 year ago  |  last reply 1 year ago


How to bookmark a project

Does anyone know how to bookmark an Instructables project so that I can come back to it? Thanks. Scott U.

Topic by sumphrey 1 year ago  |  last reply 1 year ago


Adapting LCD Active Shutter Glasses (3D Glasses) possible?

Can you take a pair of Active Shutter glasses, ie. Samsung and adjust how fast the glasses are flashing (They usually flash around 92hz (48hz per eye), I was wondering if you could drop that down to 4-6hz per eye(8-12 hz overall)Is this possible? With a the circuits and timers?Any ideas on how to do this?Thanks

Topic by bethekind 1 year ago  |  last reply 1 year ago


Car phone charger works in a 12v car port but explodes from a 12v DC adapter?

I've got a lighting project that is powered by a 12v power supply and is driven by a 5v arduino. I want to minimize the amount of wiring I run to the project and power the arduino from the 12v power supply. One of the instructables recommended to use a simple car phone charger. 12-24v to 5v. Well I did and the thing exploded. I checked the polarity (bought a few of them) and it's correct, there's also an onboard LED for indicating power on. Thing lights up, works for a second and smoke starts coming from the IC.What is so different between the car 12v and DC adapter 12v?the onbaord IC is ADB85063

Topic by MilesT9 1 year ago  |  last reply 1 year ago


an orderable switch which allows to pass an alternating current

Hello instructables !I am searching for an orderable switch which allows to pass an alternating current.Which componant can I use ?Thanks

Topic by thomase39 1 year ago  |  last reply 1 year ago


Real Tone Cable (Rocksmith) 1/4" to USB adapter

I'm doing a project. Attempting to replicate the rocksmith real tone cable. Yeah it's not going to be easy... I need to; amplify the signal coming from the guitar, then find an Analog to digital Converter, then figure out how to conect via USB, then I want to write a program on the computer... but thats a looooonnnng way off. I figure the voltage coming from the guitar output is about 500mv but im not sure because it's too small to read with my meter. What kind of transistor or op-amp can I use to get the voltage to around 10v where an ADC can read it? If you have any advice on what kind of ADC to use please let me know. I think 10v is around the min for ADC's input range. Would it be a better idea to amplify the signal further so i can use a different ADC? If anyone has a real tone cable they feal like opening up... let me know whats inside eh? Thanks for any help

Topic by amplifihip 6 years ago  |  last reply 1 year ago


Joystick Stiffness

My joystick which i have been using for the past two months now without any issues just suddenly stopped working and i don't know what to do right now. Please i need assistance.

Topic by mgbemena0007 1 year ago  |  last reply 1 year ago


Recommendations

I was wondering about the "recommendations" section we can find on top of the comment section, on each instructable. Are these recommendations the same for everyone? Or are they specifically selected for each reader, according to the "favorites", "following", etc...?

Topic by Matlek 1 year ago  |  last reply 1 year ago


What should I do with these cardboard tubes??

Greetings!    I have approximately 100 of these cardboard tubes from pallet wrap that I've been bringing home over the past few years from work.  I've been intending to do something innovative w/ them, but I've not been able to come up with an idea that will put a lot of them to good use!    Does anyone have any thoughts on what I can make w/ these?? Thanks! Steve

Topic by He11uvaCook 3 years ago  |  last reply 1 year ago


Landscape Lighting Electrical Connections?

We are in a newest home (5 years old). We had in-ground wiring installed but no lights. My wife now wants landscape lighting installed.I have two sets of 12 awg wire terminating near an outlet at the rear of the house. One wire was tapped with black electrical tape while the second 12 awg wire had green electrical tape.I found all the wire loops (where they come out of ground)However, I also found a junction box. There are two sets of 12 awg wire into the junction box but nothing is connected (pic attached)I then found a location where two sets of wire terminate. (Pics attached) comes out of ground, does a loop, but there's also an end piece. First I assumed, I had a "loop" system" but the junction box and now these two locations with en end piece of wire is throwing me off. Thoughts? Any suggestions would be helpful.ThanksB

Topic by BertF8 1 year ago


instructable can't be seen in Incredimail

For the last month I have not been able to see te complete Instructable email when viewed with Incredimail. I haven't updated Incredimail so it shouldn't be that.  I get just what fits in the preview pane and the progress bar shows a full indicator. If i double click in the e-mail to open it separately i get the same problem.  I can however see the e-mail if i select forward or reply but of course no links are active so I can't get at them from there. When the e-mail is selected for viewing you can't scroll down to see the rest.  It works fine for all other e-mails I get. Attached is a screen shot showing the screen with the Insreuctable in the preview pane. Thanks Bill Laurin  

Topic by bbwest 7 years ago  |  last reply 1 year ago


Mosquito Killer Bat

Hi I found my mosquito killer bat not working, i replaced its battery two times no use. one of its no named capacitor is leaking a wax like thing. How to fix this ? any circuits available ?This is the batMosquito Killer Bat

Topic by milans 10 years ago  |  last reply 1 year ago


Power outlet controlled by windows driver (not master/slave circuit)

HI, the idea is to control a power outlet when the OS is booting. And even more important, when the OS shuts down. the outlet should turn off before the PC goes in shutdown.A master/slave socket (which i have) only switches off when the PC goes into OFF modes which results in a big bang on my Active Speaker setup. (behringer B2031A with B2092A).So, in short. i need a circuit thats being controlled ON after a driver has been loaded during BOOT.and that cicuit needs to power down when the Driver is being offloaded during shutdown.AC being controlled by a solid state relayThank you for anyone who can helpbest regardsmarco

Topic by marcoNLD 1 year ago


Kitty Litter Bucket Group/Sites/Ideas???

Does anyone know if there are any groups are sites that promote/share ideas for reusing Kitty Litter Buckets?  Maybe it's because we have four cats, but I find new uses for those things Buckets all the time!  I'd like to see some more varied ideas and uses...  and I had a hard time finding any 'inspiration' when I came up with the idea to use them for shelving.  Keep sharing those ideas to reuse!! Peace, Love and Joy Funcky

Topic by funcky 6 years ago  |  last reply 1 year ago


How do i make a ship

How do i make a ship?

Topic by JoshuaZ30 1 year ago  |  last reply 1 year ago


Raspberry pi3 and drone communication with MultiWii Serial Protocol (MSP) API

I want to make line tracking with drone but i have some problem. the drone's control cart sent to data raspberry but raspberry can not sent to data. i tried communication with msp api but i didn't it. Please help me!!

Topic by isay1 1 year ago


how can I make a cricket chirping sound w/o electronics?

I'm trying to figure out a way to produce a realistic cricket chirping sound, using something mechanical (i.e., not electronic).  So far, I'm not having much luck.  The only examples I've found of what people are calling "cricket noisemakers" are either big carved wooden cricket-shaped toys with a serrated part that you rub a stick against (which doesn't sound remotely like a cricket) or the WWII metal clicker that was called a cricket, but sounds even less like one. A cork twisting in a tapered wooden hole produces a squeak, but crickets use "stridulation" which, if you slow the sound down, is actually comprised of about 6 individual tones in rapid succession.  That's a complication I'm still trying to wrap my head around. Any suggestions? Point of reference: https://youtu.be/CQFEY9RIRJA

Topic by Bricology 2 years ago  |  last reply 1 year ago


Why couldn't I enter in this url - http://your.raspberrypi.ip.address:5050

I need this url for making a echo. But it didn't work. Please help.

Topic by fairuj 1 year ago  |  last reply 1 year ago


slingshot ammo

Come for slingshot ammo ideas like this one on the pic

Topic by sharlston 10 years ago  |  last reply 1 year ago


Driver for High Powered 3W, 5W LEDs

Hey folks,I am new to this LED thing.I've bought around 90 high powered 3W and 5W LEDs with different forward voltages, and I am going to power them using some LED drivers that I bought with them. After searching for a while about how the nature of LEDs are, I am not sure about how should I connect these drivers to the LEDs because the drivers are constant current type of 1500mA, and the required amperage of LEDs are 700mA. I am thinking of adding one resistor to reduce 1500ma to 700ma just after + output in the series of LEDs line, but then because the drivers are a constant current one I think the resistor might just not work as the driver may try to push the current to reach to 1500mA so then it may ruin the resistor and LEDs afterward. Well, this is my guess and I am not so sure about that, so I need help with this one. Here I bought 5pcs of the 50W type:https://www.ebay.ca/itm/162156429886Above link is the drivers that I mistakenly bought from ebay (I could buy the 700mA drivers and make my life easy, but there is no high wattage (above 100W) with low amperage (700mA) LED driver in the market for a reasonable price for an unknown reason to me, could anyone answer this too?) Also my another question is about the nature of LED drivers: Let's say there is a LED driver with a constact current of 700mA and output voltage of 30-45V and some LEDs with forward voltage of 3.7V and 700mA required current, what happens if I connect 4 LEDs to this driver? Does it ruin the LEDs for getting more voltage than required? Or it's gonna be fine because the current is constantly 700mA? I am so confused right now! Please help!I also bought some temperature switches so I could add it to my circuit so I save my LEDs in case they got so hot! Yet I am not sure where to add them! If anyone could advise me on this I really appreciate it!

Topic by gamma-rays 1 year ago  |  last reply 1 year ago


Anyone know how to make those trippy/psychedelic light shows?

You know those "acid shows" or "light shows" that were really popular in the sixties? (I think Joshua White was a pretty famous light show artist...) Anyone know how to make cool ones? I mean... it seems pretty simple, and I get the basic concept. Colored filters, swirls of colored oil... and water... and alcohol maybe, And a projector... but is there a "proper" way or something? Probably not... but anything you know on the sibject helps. Any ideas? Or... instructbales? Oh. P.S. An instructable on Underwater Light shows would be welcome too. Woah. I just had an awesome idea. But I'm keeping it to myself for now.

Topic by iamthemargerineman 11 years ago  |  last reply 1 year ago


May the Fourth - Theme 3-course dinner

Last weekend I finally watched Star Wars Episode VIII: The Last Jedi. So with May Fourth coming our way I decided I would cook a nice Star Wars themed 3-course dinner for me and my wife this Friday. The idea is just simple food, but made it looking like something linked to Star Wars. I've come up with some ideas, but more ideas are always welcome. Here's whats on the menu up to now:Appetizer - Galaxy carpaccio:Purple beetroot 'empty space' carpaccio with sesame seeds 'stars' and drops of balsamico 'black holes'Main course - Star Wars Episode IX: The Fast-Food Hero:Sweet 'C3PO'-tatoes / 'BB'-pot-'8'-oes'Han'-burger 'Solo'Grilled green asparagus 'light-sabers'Dessert - Cheese platter:May the Roquefort be with youRevenge of the SwissMozzarella Death StarBabybell star wars smileysSo what are your suggestions?

Topic by ruudcreates 1 year ago  |  last reply 1 year ago


"I Made It!" Madness!

Anyone who posts a new "I Made It!" between today (March 13, 2018), and April 15, 2018 will be eligible to receive a new Instructables notebook and carpenter pencil. For those new to the site, an "I Made It" is a special type of comment that you can post on an instructable to show that you followed the directions and made it yourself. You can find the big orange "I Made It!" link at the end of any instructable. Post a picture of your brand new "I made it" in the comments below and also a link to the project where you have shared it. On April 16 we will be selecting 20 people at random who shared their "I Made It!" below to receive these gifts.

Topic by randofo 1 year ago  |  last reply 1 year ago


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. (https://www.instructables.com/id/Build-The-RevIO-Arduino-Clone-My-Way/) 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 6 years ago  |  last reply 1 year ago


3D Printing Fails.

I'm not exactly sure why, but the BBC collected a bunch of 3D printing failures. I couldn't resist sharing the screenshots and captions, especially in light of Fungus' recent topic. Enjoy.

Topic by Kiteman 5 years ago  |  last reply 1 year ago


Unable to reply to comments

Why is it impossible for me to reply to comments on my tutorials? I tried on both firfox and google crome. Same thing.It says to ' type comment before posting' ! well i've typed...but it's not posting. Same problem even in mobile.Please help me sort it out. Thanks

Topic by shazni 1 year ago  |  last reply 1 year ago


Attempting to make my own toe prosthesis...

Any helpful suggestions? I'll explain my situation: I have a partial right big toe amputation. basically, the entire tip end where the nail is supposed to be is gone, right to the joint, leaving me with a stubby, short half-toe. I've found some companies that will make realistic prosthetic toes, fingers, ears, etc, but the cost is too much for me. ($3000 for something with a life expectancy of only 2 -3 years!) I've decided to make my own using silicone. My plan is to make a mold of my sister's toe and fill it with silicone. I'll also mold my poor little stub, make a plaster replica of it, and stick it into the silicone-filled mold of my sister's toe. The idea is to custom-fit it to my toe. The parts that I'm finding difficult are painting it to look realistic, and also finding an acrylic nail large enough to pass as a large toenail. If anyone has any suggestions, or even a better method, please feel free to enlighten me! Thanks.

Topic by i_do_not_mow_lawns 11 years ago  |  last reply 1 year ago


Looking for advice on LiFePO4 car battery replacement for SLA

I'm thinking of replacing my 12V lead acid car battery with a DIY lightweight battery based on LiFePO4 cells, but before I dive in I'd like to get some advice...My plan is to use 4 sets of 2 x ANR26650M1B cells in parallel, to give 13.2V output, and high output current, and about 20Ah capacity.(These cells seem to be used in commercial lightweight car batteries, so seem like a good choice.)Now, question 1: Can I just use these 8 cells as a drop-in replacement? With, presumably, occasional balancing out of the car.I think the answer is no: while my initial research suggests that some people are using off-the-shelf LiFePO4 cells in this way, a whole lot more people write about the protection and balance electronics they're using, and I don't suppose they're all wasting their time.Question 2: If Q1 = "No", would adding a balancing and protection module enable the cells to work safely in the car? There are 100A and 200A 4s modules available, so they should be OK with starting current (c. 120A in my case). I guess it's a question of whether it's OK to have such a protected battery pack constantly hooked up to c. +14.4V from the alternator, or whether I need to limit the time that the battery is charged from the alternator.Question 3: is it smarter to use super capacitors plus lifepo4 cells, to enable higher starting current while keeping battery discharging current low? (I started out thinking of combining an RC LiFePO4 battery pack with 6x400F super capacitors, but realised that I could get enough current with the ANR26650M1B cells, and fewer components should mean less to go wrong)

Topic by PaulI48 1 year ago  |  last reply 1 year ago


Landline and mini speaker & microphone : can one use bluetooth mini speakers ?

Hello,Is it possible to use one of those small bluetooth speaker + microphone sold everywhere with a corded phone (cordless but wired to rj11 modem-routeur) to achieve some kind of JABRA-like system ?This is intended for me (light hearing impairement) and my parents.Of course the Bluetooth would not be used as bluetooth but as a "wired" speaker+mic to the phone base (with 3.5mm audio cable as for headset used by gamers..The idea is to get a louder volume than the handset or base of a corded phone can provide.and the problem of sound quality + cuts that arise from this mode of use (listener cans speak but with a delay ...) Please, don't answer me to buy "Jabra" or buy "amplified" dect phone.Just in case, I dream of a mini speaker not bigger than a glass o water connected with a lapel microphone (or replacing the microphone + speaker of my GIGASET handset ...)Any answer and/or suggestion would be appreciated.

Topic by InZo 1 year ago


A hot box full of Satan!!!

I'm already preparing for Halloween. One of the props I would like to build is a box to hold "Satan." I'm not yet sure what I want it to look like (rock? metal?)... but I do know that I want it to be warm to the touch. Not HOT... nothing that would actually harm anyone... but obviously - and devilishly - warm. My first best thought is to take something like an old-school metal lunchbox, create false walls on the top and bottom, and then put SOMETHING in the in-between spot. But what? Chemical hand warmers? Something battery-operated. Your ideas are welcomed. And if a little bit of smoke could come out, all the better. Please shout if you need any clarification!!! Thanks!!!

Topic by Purple Chez 1 year ago  |  last reply 1 year ago


Question: Best materials to build a meter height elevator (3 floors)

I have a challenge, and that is, to build a 3 floor elevator. The main frame was built using 2mm carbon steel sheet and rivets, and painted blue. The frame, 950mm height, 250mm width. I thought of using doors (two halfs, opening to opposite sides). What I'm lacking is: • the motors to open the doors (already have one for the cabin, which is more sheet); how strong they need to be• the doors; more sheet? They will be on the main frame. And, should the doors slide on a U like tube to prevent them from woobling? or use gear racks weld to the lower part of the door? And, how would I join the doors with the motors, pulleys and belts?. I'm having stupid amounts of difficulty to view how I am to make the doors work. This will run on grafcet, already done too. Just really only need to assemble the doors and its motors.

Topic by PauloD30 1 year ago  |  last reply 1 year ago


WTV020M01 sound module need help

Hi I recently bought a cheap WTV020M01 (WTV020SD) sound module from china. i know you get what you pay for but i cant really afford to spend big on that kind of electronics or else i would have. Any ways my problems is i have wired up the component as instructed, loaded up the audio files as per instruction on the micro SD card and connected it to power and hit the play pin. And NOTHING happened. i then tested to see if it was getting power and yes the power was fine. After being frustrated i tried moving around the power connector and discovered that if i placed the power in the reset pin the module lit up as if it was working and all the buttons worked but still no sound. i am not sure that as its a cheap component its a dud or have i just wired it up up wrong, or an i missing something like an amp. any help would be good thanks. here is some links to the component specs http://www.datasheetq.com/view.jsp?pn=WTV020M01&fac;=ETC⟨=en

Topic by solarsun 3 years ago  |  last reply 1 year ago