Servo Controlled door

Hey I'm making an arduino controlled door. Will a servo provide enough torque to open and close a bedroom door?

Posted by fruitkid101 8 years ago


How to keep door ajar for winter. Cat keeps opening it.

Winter is approaching in Australia. I work in my home office and my computers and sometimes heater [or bread machine :)] keep the office warm. My cat likes to visit for a scratch several times a day. For this, the door must be openable otherwise i have to let the cat in and out. I have been keeping the door nearly closed which keeps the warmth in. However, my cat arrives and virtually bashes it open. The heat in the room is sucked out within minutes if I am distracted by work enough to not close the door ajar on entry or exit of cat. How can I add an upgrade to the door which will keep it closed-ajar if a cat or human uses the door. I would like to solution that can be disabled as in summer I would like the door to be open (which is working and does not need a solution to keep it open). The door is on equal balance (if that makes sense) and I would not like to modify the door hinges. (I had attached an image but must not have enough trust with this site for it to display). The door is a colonial door if you see pictures on google images.

Posted by valamas 4 years ago


Energy Efficient Dog Door

Winter is coming and I have four dogs and two cats. We installed a dog door to the outside some time ago, but it's a big air leak. Even though we replace the door every six months, it's only plastic with magnets on the edges, and doesn't always fall back into place. I've tried various solutions, but what I really need is a solid door that locks into place, or a door that opens and closes with a trigger. Automatic dog doors cost about $350.00 - $450.00, and require the dog wears a special collar. I'm not looking for security, I'm looking for energy efficiency. Can someone please help? I know there are lots of others in the same position.

Posted by mattyw21 9 years ago


cat running out the door

I'm looking for a device to stop my mom's cat from darting out the door.  My mom is 78 yo. and doesn't react especially fast.  I'm wanting some sort of electric mat that will only be activated when the one cat is on or near it.  The door is used constantly by humans and the dog uses the door also.  Therefore, it can't be activated by stepping on the mat.  I'm thinking of a collar device that the cat would wear that activates the mat or activates a air burst or sprayer, etc. Any ideas?

Posted by carolb4 6 years ago


Motor Clamp

I am extremely close to finishing Grathio's Secret Knock Detecting Door Lock (https://www.instructables.com/id/Secret-Knock-Detecting-Door-Lock/). I am about to mount to my door, but unfortunately the clamp (step 3) has not been working out for me, and in no way will the motor be strong enough to turn the lock. Any other suggestions on how to hook up the motor to the door? FYI: my casing is entirely different from that of his instructions. Thank you!

Posted by KGuy 4 years ago


Indoor buzzing door opener with multiple openers

Hey guys, i would really like to have an instruction on how to install and customize a buzzing door opener. i´m kinda a lazy person and i want others to respect my privacy. My family is constantly rushing into my room in the most...lets say awkward situations :D I want the door to my room just to open from the inside or from the outside when pushing the open button. On should be near my pc and one should be near my bed. This would work perfectly if i get one of this buzzing door openers which are used to open the main door to the house. But i dont wanna replace my hole door. Just the metal part where the lock is. Also it would be neat if the openers where wireless. And the lock should work like a normal lock: I put in the key and i come in from the outside like a normal door =) Any one brave enough to take this challenge?

Posted by mpott1 5 years ago


Short range battery operated 2 part (door alarm type) distance sensor.

Hello all! I'm looking to design a range compact distance sensor that will sense 1-4 ft increments. If necessary i could modify a door alarm. id like to fab one or multiple if need be to sense the distances noted. I could utilize a buzzer or some way to record a voice that would alert to said distance. The battery voltage max is 4.2v dc and if it could be rechargeable that would be a plus. Any help on this would be greatly appreciated. Thanks!

Posted by Automan350 8 months ago


Automatic coop door

Does anyone have a automatic chicken coop door diagrams. 

Posted by Nhoca1965 3 years ago


electrified door knob

I would like to know how to make a door knob give some one a shock when they touch it?

Posted by jaadmc 11 years ago


A new folding door I just saw on facebook

I would love to see someone build this door.  I believe it is beyond my capabilities   http://www.viralnova.com/folding-evolution-door/

Posted by paqrat 4 years ago


Door upcycle need help hiding hinge area

I am trying to make a desk out of a hollow core door. I want to fill in the hinge areas before painting or put something there after painting to make them look nice. any ideas? I haven't found any online and I've spent hours looking.

Posted by BrookeF 1 year ago


Two-way hinges

My wife and I bought an 80s designed house that's not that well designed. We keep one of the litter boxes for our cats in the garage, which is accessed from the inside through the laundry room; and we want to install cat doors so our aging felines can pass through the doors easily to get to it, while keeping the draft from the garage out of the family room. The interior door (between family and laundry rooms) is a standard hollow core and the exterior door (between laundry and garage) is fire code rated solid wood door.  We tried a standard top-hinged door with the cats already, at our old apartment, and the cats didn't take to it, so we we're hoping to do french doors, since they know how to get through normal doors pretty well. But we're kinda stuck on our lack of knowledge about hinge designs; we need hinges that swing both ways. Has anyone out there successfully completed such a design/installation and would be willing to share pics and secrets? 

Posted by sirenwerks 7 months ago


Hidden Door Latch

I am looking for a secret "latch" to open/close a bookcase that covers a hidden door. There are some nice electromagnet types but they are expensive and need power. Any ideas on a "Chinese puzzle" type of thing where you move a couple of things and it opens? I don't want the classic horror movie things like move a book, lever or statue 'cause that's the first thing someone would try. Just fishing for ideas!

Posted by Greenehouse 10 years ago


Door's spy hole turn digital using an old camera

Hi, i have an obsolete digital camera 20 yo. and i was thinking to use it to replace my door's eye with a lcd display The old camera has all is needed: lens with cmos sensor to fit on the outside of the door and lcd display (a small one in my old camera) to fit on the inside; i haven't disassembled the camera yet and i am not sure about the diameter of the lens and cmos sensor; of course i do not want to drilll a bigger hole in my expensive door! do you have any exprerience? Regarding power supply, my camera use 4 AA batteries but i could replace them with a 18650 battery and a small step up converter

Posted by m_a_x 3 years ago


Ideas for how to make a kinetic pin wall door

Http://youtu.be/F88D-eQMC9c The concept was to take the pin walls that you see at museums and science centers and make a kid's bedroom door out of these push pins.   From talking to manufacturers it appears to be a pretty pricey proposition (.25 cents per pin / approx 55,000 pins per 4x4 area). I was wondering if anyone had any ideas how to make this more economical?  Or if it had already been done and there was an instructable already out there? Thanks!

Posted by msmith94 6 years ago


Doors and WIndows Automation

Hello, I am trying to automate the windows and doors in our barn using NEMA  stepper motor and Lead screw and would like to exert around 20 Kg force for opening or closing. The windows are fairly old and made of wrought Iron. I am wondering if somebody can advise and help me selecting the motor (based on torque) and the appropriate diameter of the Lead screw for this instance.  The idea being that when the lead screw rotates, the ball nut flange moves left or right and pushes the connecting rod out or in thus opening or closing the window I have attached a rough sketch what I had in mind and please pardon me for any mistakes. Many Thanks Ash

Posted by AshishJ61 1 year ago


What could go wrong in a standard garage door opener?

Hello there, I have been asked to try to repair a malfunctioning garage door opener. The man who handed them to me said all of the modules work for a few weeks, then suddenly stop working. I opened them, looking for any burnt component, dry solder joints, tested relays in search of a stuck one, but could find nothing. I tested them at home, and they all reliably clicked their relay on and off, as expected. So the question is, what would cause ordinary garage door openers to fail? I thought about a bad powerline (circuits are 50's era in his building, and have never been redone), but have no means to check it. In the same direction, I was looking for a different model garage door opener, and only found two alternatives: one is the run-of-the-mill SkyLink stuff, expensive, reasonably secure, the other is the dirt cheap Chinese-made remotes with no hint about security. Since this is Instructables, I looked for garage door opener projects, but most are so-called "smart" and need a reliable Internet access, both on the smartphone and on the receiver module. Since this is a multi-tenant building and my country is known to be among the most expensive for internet access 1. there's no easily accessible Internet in the garage 2. drivers can't be assumed to have a smartphone and even if they do, 3. Internet access on a cell phone is extremely expensive. The other question would then be: have any of the community members here saw a garage door opener that would: 1- only need easy-to-make RF remotes? 2- be at least as secure as the original SkyLink? 3- require no Internet access?

Posted by Cubytus 2 years ago


Light sensitive/remote pet door battery powered

Hi all i have scoured the site but cant seem to find a project that i need, and would therefore benefit from any help and advice on how to build an light sensitive automatic door opener for our chicken coop. it seems an obvious project to me,, hopefully one not too hard that i can do with your help. we have a barn thats too far away from the electricity, so it needs to be self powered by battery. i can look into trickle carging the battery by solar seperatley i am sure on the site. but, the wife is sick of having to go each night and shut the chucks in to keep them safe from the fox, and then open up every morning. we were wondering if we could use a standard light sensor you find on the cheap security lights at the DIY store, that would trigger some kind of motor or catch etc to slide or raise a door. then if possible, to do the opposite when the morning comes. if the LUX sensor is not possible, then maybe on a timer, or even posibly remote. i need help and advice on the whole thing, as i have no idea on what type of mote, (if i need a motor at all) i need, will it burn out if it has power all the time?, how to stop it? loads of questions i cant even think of support with your answer would be appreciated. thanks in advance

Posted by rockrat 8 years ago


Please help with 1st arduino project

I love this site, and have been totally inspired by many of the projects I see on here, thank you to everyone who takes the time to post their work here. I'm trying to get into my first arduino project and am just looking for some help getting started.  Like many other people, my wife/kids (never me) tend to leave the garage door open, and I was looking for an inexpensive way to build a monitor, using an arduino board. Joe's garage monitor seems really great (https://www.instructables.com/id/Garage-Monitor-3001/#step1), but the post is a little old, and some of the parts listed do not look like they are available anymore. And it may be too much, I can connect this sensor to my home network (since my garage is next to my home's boiler room where all my networking is wired to). So basically I am thinking of the magentic sensors (http://www.dinodirect.com/Plastic-Door-Magnetic-Sensor-Alarm-Security-System-MC-31.html) on the grage door to indicate open/closed, which are only a few dollars, and then somehow connecting that to an arduino board, and then patch the board to my home network where I can log the status to a database. any help with suggestions for an inexpensive board to get started, is greatly appreciated, thanks!

Posted by ericb1 7 years ago


Retractable door screen

Hi, It's just coming on to nice warm weather here in Australia and the flies are pretty bad. We have an odd situation with our front door in that there's this wooden beam supporting part of the roof that comes across low. This makes it impossible to have a screen door that opens outward (the main door opens inward). My son suggested that we get some sort of retractable screen, but they are so $$. Does anyone know of instructions for how to make your own? Perhaps something that retracts on a vertical roller on one side and when open, it seals tight on the other side with a magnet strip. Thanks, ebb_AU

Posted by ebb_au 6 years ago


automatic sliding door

Hi,  I ve been looking all over (www), and I can't find any useful tips, tuts, ... about modding an existing sliding door into an automated one.  This without ordering a ready-made system, which costs many $$$$. I 've had this idea for a while already, and I admit seeing https://www.instructables.com/id/Air-Powered-Star-Trek-Style-Door/ brought the brain to bubble again.. If anyone has some experience with this or can share some interesting links ? (re-use an old engine from something..., controls.., touchpad/sensor, ...) would be great. thx D

Posted by dimicool 7 years ago


trigger retail door alarm

I know most people that think of retail exit door alarms want to avoid setting them off, but is there a way to purposely trigger them, especially from a distance? i am reasonably good with a soldering iron, ok using a ohm-meter and beginning on using oscilloscope. and i have lots of junk PC/PC parts and various other electronics around to strip for parts... (if that helps any). thank you for reading --rex

Posted by rexifelis 9 years ago


Automated Garage Door Timer

I have the bad habit of leaving my garage door open sometimes. To come home with your garage wide open is pretty scary. So I was thinking of this idea...  The garage automatically closes after 5 minutes. But that's pretty annoying so I figured you could install a switch underneath the garage door opener that will leave the garage door open. Any ideas on how this could be done or more suggestions? Thanks!

Posted by BrianKT 8 years ago


Car fob for house doors?

I've seen a couple different examples of re-purposing things like wireless doorbell ringers or other devices to activate a door look solenoid but i don't want to carry any more stuff in my pockets.Ii was wondering if it's possible to use a car fob to do the same thing? i would love to map the door lock button on my car fob to unlock my front door and vice versa for the lock button.  I know for garage door openers in your car you can hold down the OEM remote and it syncs the signal not sure if there is a way to do this with my car fob.

Posted by SpinningCone 6 years ago


Connect multiple Reed Switches to one Raspberry pi

Hi, I was wondering if its possible to connect multiple reed switches to 1 Raspberry Pi so i can get notified whenever 1 or more switches gets triggerd. thank you.

Posted by archi0112 11 months ago


F150 Door Lock Jammed

My driver's side door lock is jammed, what would cause that and how do I fix it?

Posted by swiftshawns 1 year ago


Securing a Car Door

I have a car with a mechanical door lock that is broken. Hence I cannot lock the car door (drivers side). I tried to stick a couple of staples (from hasp and staples) using superglue to the door and body work with the idea of putting a padlock through both. To my surprise the superglue would not stick. Has anyone any idea how I can secure the door while the lock is broken. Thanks

Posted by anon_private 2 years ago


D.I.Y.: How To Build A Fully Automatic Cat Door?

Paying over $300 for one, is just too much. plus 40 bucks for each collars. Do anyone know How To build a Fully Automatic Cat Door? http://www.hitecpet.com/powerpetdoors.html

Posted by marquita188 7 years ago


Building boxes to fit existing doors

I have about five Tasmanian Oak cupboard doors and they are an odd size (W:490cm x H:575cm). I want to use some of them on low-hung overhead cupboards in the kitchen. They have a board insert with a plan board on top and sides. They would look good, I think, just lightly stained and sealed or painted white in the farmhouse style. Problem is, because they are not a standard size and I cannot by stock cupboards to fit. I thought I could buy mdf or pine boxes to attach them to but the odd size makes this difficult too. So then I thought - I will have to build them myself. As I am a total novice, does anyone know how I can do this, tactically and in the most economic way? Thank you in advance ...

Posted by calyad 11 months ago


Safety of your garage door or car remote...

No time and no pics for a proper Instructable, so I just put out some word of warning ;) Around here bad people take advantage of the fact that a lot of new houses have the garage right next to the house. With these you usually also get a door so when you park your car you don't have to get out of the garage again. All controlled by the press of a button on the remote... Some fancy guys got a device working similar to the IM-ME Open Sesame hack a few years back. But unlike the original author the new guys found ways to make money by providing working "universal garage door openers" on dubious websites. Problem with the new model is that it not only fakes a remote with dip switches but also the newer models with so called "rolling code", "intellicode", "changing code" and so on. The old remotes with dip switches should actually by phased out years ago by any owner who values his stuff... But the new models are still deemed secure and next to impossible to hack - well if you trust the advertisement... How does the code hacking work? The old dip switch models allow for a maximum of just over 4000 different codes and come in just 3 or 4 frequency bands. No real problem for anyone with basic electronic and coding skills to hack these - as shown with Open Sesame. The new models all use a so called rolling code, here the remote and opener are paired through 32 bit of ID code and an encrypted part that changes every time. Both remote and opener calculate the next code once a button was pressed or a code received. To overcome reception problems the base usually calculates the next 256 codes in advance - and that is the entry point for bad boys. The illegal device scrambles the frequency detected while storing the code received by the orignal remote. As the door did not open the owner will try to press the button again. Still scrambled to opener does nothing - until the device sends out the first recorded code! Now the owner can drive in and is happy. Of course he still needs to close the garage - again all is scrambled and the code stored as before. You see where this is going.... It is even possible to set the amount of required tries to capture, so in theory a bad guy could get the next 10 or codes in advance for use once the owner is gone out... Worst thing however is that these illegal devices not only open garage doors but also cars as a lot of them use similar systems for their remotes - up to the point of starting the car with it. Took me only 2 hours with Google translate to find a website outside the usual search results that offers these "gadgets", along with WiFi and cell phone jammers, credit card copy devices and more things I don't want know about... What can you do to protect yourself? First check what type of remote your system uses - if there are DIP Switches than replace the remote system or the entire device in favour for something more secure. If you already have a rolling code model that you are far better off but sadly no longer totally safe here. A lost remote should not only be replaced but the old one removed from the system as well - you never know if you just lost it or someone took your remote ;) Alternatives exist, especially if you are not afraid of doing some open heart surgery on the electronics of a garage door opener. You can add a WiFi module and use your mobile phone to open the garage - search Google if you like the idea ;) Another very neat way is using a second transmitter that keeps the relay for activating the opener from working. This can be anything from a BT module paired with your phone or cars BT system over a keycard to numberplate recognition cams. A good system also allows for a "holiday mode" or similar. Here you can set this mode with one remote until you deactivate it with the same remote the system will not react to anything. Great if you leave the house for more than a day or two... As a last resort you can always get a big and angry dog to sleep in your garage.... What if you are renting or a bit limited with the electronics and soldering skills? Not all is lost if you can accept a second remote for added safety. These days you can get plug in converters for your mains voltage outlets that work with a remote control. Unless they use Infra Red for this they are great to disable your opener. Simply plug it in where the power cord for the opener is and then plug the cord into it as well ;) Now you can fully shut off the opener with the press of a button and only if the power outlet is switched on the opener will work. If in doubt you can use a double outlet adapter an extension cord and a night light to indicate wether or not the opener has power. Ok, and what about the door lading from the garage into the house? Well, of course keep it locked and if you are home also keep it locked. At least this way you have some extra time in case someone tries to enter through your garage while you are sleeping ;)

Posted by Downunder35m 1 year ago


broken shower door handle

My son broke the shower door handle by hanging off of it. of course it snapped right off. its connected by prongs on both the shower door and the handle and that's what snapped. is there an easy way to fix this? both surfaces are metal.

Posted by nymick131 8 years ago


Temp controller

I need to activate a garage door opener  with temp control. Opener uses momentary switches   There is a solarium on the out side of my shop garage door, When the temp between the door and the solarium reaches +/- 90 degrees  the door would open and +/-60 degrees the door would shut. Because the opener needs momentary contacts a regular thermostat  will not work. Any ideas would be greatly appreciated..

Posted by mcsxr2 5 years ago


Modding High-end pet door

I currently own and am using a High Tech Pet electronic pet door (http://www.hitecpet.com/px-1detail.html) and would like to modify it to: 1) Read/activate via a small RFID tag instead of the very large (for a cat) sonic transmitter. The cat is feral (we lock him at night in the garage), so he sometimes gets in fights and loses his entire collar. The transmitters are $40 each! He's lost three so far. 2) Switch mode to "in only" at a preset time very night and "in and out" mode every morning. I like the features of this door, and it's already installed. It's extremely weatherproof and resilient. Most Lexan/acrylic cat flaps I've seen or owned aren't even in the same league as this one, which is why I would prefer to keep this door as opposed to modding a different brand of door. I know how to solder and have a very basic understanding of electronics. I could probably muddle through a DIY, but I'm not even sure it can be done. Is it as simple as locating the receiver on the board and replacing it with an RFID reader? Or is that wishful thinking? Thanks in advance for any insight, advice, help. :)

Posted by S2kvan 5 years ago


Release door on cat trap

I'm trying to trap a stray cat. The lenders didn't set it up right so now in my trying to figure it out I've got the trap door closed and can't figure out how to get it open. I know how to set it now...just need to open the door back up.HELP'

Posted by evalyng 10 years ago


Control Garage Door with WeMo Help

Hi everyone, I am a beginner with anything that has to do with electric circuits and I need your help. Recently a WeMo light switch came to my hands and I thought it would be a good idea to use it as a wifi remote and as a regular switch, of course, for my garage door. I thought maybe someone on this forum could guide me to install the switch to the circuit board of the garage door. i have also attached some pictures of the garage door circuit and the switch. Thank you for your help

Posted by dark0mlks 11 months ago


Frigidare / Electrolux FRT04L5DB0 Refrigerator

Anyone know how to get the freezer door apart to switch the hinge on this unit?

Posted by Red Gym 11 months ago


The Green Glass Door game!!

This is a forum based game in which players (YOU) are trying to get objects through the mysterious Green Glass Door! The keeper's (ME) job is to make sure only the right things get through the wonderous Green Glass Door. So here is what you do... you say a random item, then I tell you whether or not it can go through. Pretty simple right?? forum rules apply and if you already know how to play or the discover the secret, DON'T RUIN IT!!!!

Posted by Deltablazing 10 years ago


Magnetic or IR dog door

Does anyone know if it is possible to DIY a "smart" pet door? Something like this is what I'm talking about. Basically, I want to let the dog come and go as she pleases whilst keeping the cat inside. Thanks!

Posted by rday 9 years ago


Super Cheap and Easy WIreless Remote Shutter, Under $10

I think everyone should know about this. Its soo easy, never spend more then $10 on a wireless remote for any gadget! www.instructables.com/id/Super-Cheap-and-Easy-Wireless-Remote-Shutter-under/ 

Posted by tailortrik 8 years ago


Automatic Solar Dog Door Opener

I have a dog door (http://www.hartleyglass.com.au/images/pet-door/pet-door3.png) but my dog is a bit anxious about opening the door with his head. I can't say that I blame him really. So I want to attached a solar powered device that would open when he is near by. I imagine I would mount it above the black bar, outsize where the is light with the solar panel wedge, attached to the door (see image uploaded).  I don't really know how to go about it.  The major components would be: 1. Solar panel wedge and batter (power source) 2. Proximity sensor (maybe RFID attached to my dogs collar?) 3. Motor (not sure how to detect when the door is opened or closed. etc etc  How does one go about building something like this? Any direction would be great Thanks Wayn

Posted by lucidwayn 6 years 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.

Posted by PauloD30 4 months ago


HELP- need a design for an "automatic closing chicken door"

Need a "freelance circuit designer" the idea is a light sensitive switch which once the sun went down could close a sliding chicken door.. i'm thinkin it would just slide a release which would let the "guilitene" style door slide closed. i just need someone to build it... help juntius@gmail.com

Posted by juntius 11 years ago


Homemade Pull-Up Bar?

Of course, Burning Questions! Im not sure how to make this, perhaps 2 strong metal tubes, a large and strong spring, and set this between a door? Thanks in advanced! -PKT

Posted by PKTraceur 9 years ago


garage door opener was used for a rope gate, what can i use it for now?

 I have a garage opener, commercial grade that opened a wire "gate" across my lane to deter people from driving up to my house. It has a metal wheel welded onto it to wind the cable and it's in a little hut (gatehouse) to keep it from the weather. I have a few remotes for it. Now that I have moved, what can I do with this $500 garage door opener? I will take a photo next time I'm over there.

Posted by katerlyn 7 years ago


How to? timed latch release

I want to make a box with seperate compartments with doors that will open to release a dog toy, treat etc. at timed intervals. I don't know how to use a timer to unlatch a door. Ideas? thanks - SpleenMa

Posted by SpleenMa 11 years ago


Free 'Save Our Dogs" window-door Sticker

Just sharing a really nice 'save our dogs' sticker to fellow pet owners, found this while unpacking some boxes in my archives (read garage), enjoy !

Posted by patron_zero 6 years ago


Star Trek Door, Sleek Word Clock, Speed Racer Cake

Star Trek Door Sleek Word Clock Speed Racer Cake Bike Party Trailer Cut a Royal Seal Issue 50 Has Arrived! Glass Tiles from Bottles Bubble Wrap To-Do List RM 100 Mega Rocher CD Scratch Art Fix a PS3 in an Oven 6-Sided Snowflake Dremel Table Mount

Posted by randofo 7 years ago


Opening and closing a small door

I want to build a small cabinet based on the TARDIS. I want the doors to open and close automatically and, of course, make the sound. It will only by 12 or so inches tall so I don't need anything big to do this. Ideally, I'd like to activate it by touch. My first idea was to start with the wiring for The Most Useless Machine and move on from there. Think that's a good start? Any better ideas on how to do it? The full build will be in an instructable.

Posted by mvealey 5 days ago


Want to use a pet door as garage vent.

I am a renter and have a 2 car garage with a pet door in between. The garage stays pretty hot even with a fan running. I needed to vent some of this hot air. I thought I could take a box fan and design some sort of ducting to allow the hot air to be sucked out and cooler air in and also prevent the pets from escaping. I figured I could remove the plastic grill and attaching the duct to the screw holes left from the grill removal. Not so great with geometry but needed to slope the duct box doen to the rectangular shape of the pet door. Any thoughts?

Posted by barrycdog 8 years ago


Master Minds Only (Coffee Mug "Forget me Not"

I am looking to design a coffee mug that reminds the user via a speaker attached to the door in some way, that they are leaving the house without their coffee.  The project will need a sensor at the door that can recognize a sensor built into the mug, I'm thinking Thermos style yet able to fit in a normal sized cup holder, that can be machine washed without damaging the inside components. (The design can have an attachable bottom to hold the hardware and battery source, so the main part is machine washable.)  And an additional sensor is needed on the users car keys to recognize the user is leaving the house. when both the mug sensor and the key sensor pass at the same time  a "have a nice day _______user name_____" voice recording plays when only the key sensor goes past the door receiver a " ____User name____ is forgetting their coffee" voice recording plays  My questions are for what type of sensors will I need to purchase in order to create this project? and how would I set up the code to recognize the combination of sensors vs. the single sensors by passing the door sensor? Thank you for your help Indestructable community  

Posted by Ragestine 3 years ago