need a proximity alert for when pets sneak into baby's room

Hey guys. I'm wondering if there's already an instructable for what I need, and a kind soul could point me to it?  I'm looking for some type of proximity alert.  I want to put key-fobs on pet collars (must be tiny and not too bulky for a small cat), and have them trigger an alert when the pet is within five feet or so of the baby's crib (sending a text to a cell phone would be awesome but probably too expensive to set up, so just a sound alarm would be fine and great it the alarm could sound in a different room). Is there anything like this?  Or something easily adapted?  Or even an item that can simply be bought (I don't want to build it myself, I'm just assuming I'll need to, because I've not found anything searching online)? Thanks.

Posted by aliasjanedoe 3 years ago


How to add a proximity sensor (LED) to the Radio Shack (276-1323) recording module

How do you add a proximity sensor (LED) to the Radio Shack (276-1323) recording module

Posted by Genesis3kr 10 years ago


proximity sensor?

I'm looking to make a pair of something that light up when near each other--say a foot or two. Is what i'm looking for a proximity sensor, or is there some simpler solution to this? [edit] Could I use a set of rf transmitters and receivers to turn on the light in each object without having to program anything? Thanks in advance, 10player

Posted by 10player 8 years ago


Proximity Sensor for FYP

Hi! im currently making my FYP for product design and i have a very specific model of electronics i have to make. Basically i have to make a proximity sensor (well 4) that will respond with lights (vibration) when brought towards a receiver. Hopefully i can also make this trigger sounds that are pre recorded. Can anyone help me with the proximity sensor? i am in dire need! thank you

Posted by Axial-Andrew 6 years ago


proximity chip relay

Not sure if in correct forum but here goes... I'm wondering if someone could design a simple and inexpensive way to use a chip to trip a relay with proximity. An idea I have for vehicle anti theft. possibly to bypass need for ignition barrel etc. but to allow the car not to be started without the presence of a close by chip. any ideas?

Posted by astrosurfer 10 years ago


Proximity Detectors???

I'm not sure what to realy call what i'm looking for so i'll just explain what its use would be. Basically i want to keep our cat out of one room and away from the front door. He tries to run out when ever we open it which makes for a pain with groceries or a 2 year old running around. So there are all kinds of things suggested online , rattle can of coins, spray bottle ect.. I want to put one or two canned air bottles by the door. They will be in some type of device with a sensor. Then put something small on the cats collar that will activate a sensor when it gets close to the bottles , the sensor at the bottles will activate a lever and spray out a one shot of the canned air. I thought that those automatic air freshener spay systems from Glade could help out as a base unit but i'm not sure on the remote unit on the cat and how to get it to activate the base unit.....any ideas???

Posted by baxter10 6 years ago


LED blink based on proximity

Hi, I want a LED to start blinking if it is outside some area. Kind of a prisoner electronic bracelet :) What would be a cheap solution for this? Could I do this with 2 proximity sensors? Thank you.

Posted by PedroP46 2 years ago


Hidden Proximity Sensor

Hey guys, I am trying to find a method of creating a hidden proximity sensor that would work similarly to a laser i.e. if the line of sight is broken then an output can be achieved, but without actually using lasers. There are a few problems, the sensor will be in a dark space and will have some smoke blown through the line of sight (lasers would be seen). I want the sensors to be hidden, so they will have to be mounted out of sight, but as they will be used in a relatively open space, i imagine this will mean on the ceiling. This will mean that they will have to detect all the way to the floor, so the range will probably have to be at least 8 feet. Does anybody have any ideas? i'd really appreciate any input. Neal

Posted by nezhead 9 years ago


Arduino and proper proximity sensor

Hi guys. I want to use a proximity sensor and an arduino to know when a person is in the shower. What I have in mind if that if the sensor measures a range of distance it would mean that the person is in the shower. I have made some research and the infrared Sharp GP2Y0A21YK0F seems appropriate for the distance range I need that is around 20-60 cm depending on the size of the shower. However I am ignorant in this topic and I want to know if the water from the shower will make an interference when measuring the distance and generally speaking if this is a suitable sensor for my objective. additionally I read that the voltage output from this type of sensor is not linear, would it be difficult to actually know the distance? Many thanks in advance :)

Posted by mcamiea 2 years ago


proximity car key ??

Ok so I work at a car audio shop as an installer and I see so much different stuff and do a lot of custom stuff on cars.. Ive seen a lot of cars that are keyless.. its just a key fob. when you have the fob in your pocket the car knows you are there and lets you start the car with a push button... that stuff is at least 5 years old.. now the other day a new z07 corvette came in for work and the guy handed me a fob to bring it in the shop,, nothing new at first,, but as I approached the car I heard the locks click,, so I stopped and walked back a few feet and I heard them click again... this thing is unlocking and locking on its own as I get near and away from it... And it still gets better.. after walking to and from it a few times to confirm my suspension I finally opened the door... the dash was flashing and it said welcome technician. the key I had was a valet key.. the other key fob I had welcomed the owner by name... this is really cool... I needed both fobs because I was putting a remote starter on the car and both keys are required to program it.. the valet key I had also turned on the traction control and the car wouldn't go over 40 mph... that's a lot from just a key fob... NOW FOR MY QUESTION HERE.... Is this done with rfid or some sort of proximity sensor on the fobs?? I want to build one for my car but just for the locks and push button starter... but I want to retain the factory key also..any ideas or maybe a link to an instructable?? ive searched them but cant find one for my purpose.. lots of rfid stuff though..

Posted by aclark32 5 years ago


proximity sensor

 I need to build a sensor kits that will be connected on to my midi controller and replace the control knobs. I want to control track volume (on Logic audio) by moving my hand up and down. any help for cheap solutions?

Posted by nikaki 8 years ago


[Help] bicycle proximity sensor

Hello guys i would like to start making a proximity sensor the idea is to mount it on the back of my bicycle when an object/vehicle come close it gives me reading with distance and maybe a beep or something like that,the question is i found there are 2 methods one using IR and one using ultrasonic,which one is cheaper and which one is better and easier.this is supposed to my first instructable involves programming.

Posted by Mido Masry 3 years ago


Long distance proximity detector

Hello.  Does anybody have any idea on how to make a very cheap proximity sensor, which could work over a distance of about 100 metres? I want to make a system where LEDs (carried by people!) change colour as they approach a certain point, i.e, white LEDs turn red as they move towards a central point. The problem is I want to have 50+ separate LEDs, and I'm on a very tight budget! Any ideas appreciated. Thanks!

Posted by megbrazil 7 years ago


how to build a balance board with proximity sensor and arduino

Hey guys,  So I am trying to figure out how to build a virtual balance board( using processing and Arduino), that responds to human weight when leaning left or right. An object would be falling in the screen on one side of the balance board and the person has to lean to the other side to keep the balance.  I would like to use a proximity sensor to receive and send the data ( weight ) to Arduino. I may want to use spring board for enhancing the force. So i need your help with the Arduino part, connections and coding, I appreciate your help and guidelines. 

Posted by shanymz 5 years ago


Proximity Sensor 1' - 25'; Bat Ears for a Blind Woman

First of all, I'm a noob in electronics, so please explain your jargon as you would to a 3 year old. I am smart & learn quickly. So, I really want to make my blind 80 year-old grandmother a pair of bat ears. I bought her one of those sonic distance measureres from home-depot because of the barely audible tic they send out to bounce off wall/etc and record the time it takes the signal to return. You can hear the tic, and with your eyes closed.. you can kinda tell how far things are away from you just by listening. She loves it, and it just barely.. kinda works. What I"m shooting for is a single over-ear headphone (xbox-live communicator style) with some type of proximity sensor attached, sending a constant signal to the headphone... low for long distances, gradually higher for gradually closer distances. Any reasonable suggestions would be greatly appreciated.

Posted by wiglessbuzzard 10 years ago


How to add 2nd battery to circuit or increase voltage

I have a Normally Closed NPN inductive proximity sensor which operates at 10V. I use it to control a load (light bulb), which is normally on, and goes off when the proximity sensor detects metal. The problem is that I need to work with portable batteries, or something like an acid battery, and ideally not exceed 12V for safety reasons. Since the sensor needs 10V to operate, this only leaves me with 2V for the light bulb. I need to increase the voltage to the light bulb so that I can use a decent light source. Is there a way of adding a 2nd battery to the circuit so that the bulb has its own power source, yet that too is controlled by the sensor (otherwise the bulb would just stay on continuously). Any other solution would also be appreciated. Current circuit diagram attached. Thank you.

Posted by nathanimate 3 years ago


Proximity Shirt

Is there a project on the site that duplicates what the two proximity shirts do that were sold on thinkgeek? Locked-on proximity shirt: http://craziestgadgets.com/wp-content/uploads/2010/02/proximity-sensing-shirt.gif Zelda hearts proximity shirt: http://www.thegreenhead.com/imgs/proximity-based-dynamic-life-shirt-3.jpg I am not trying to make my own shirts but I am interested in the tech that makes those two shirts work. If the same results can be duplicated with an ardurino and/or xbee, then that would be great!! Please let me know if that can be done and if yes, could you point me in the right direction. Thanks!

Posted by helloman 6 years ago


Control bulb with inductive proximity sensor

Please see attached diagrams in my other message below. I am using an NPN NC inductive proximity sensor (specs attached) to control a light bulb. The bulb is normally on and goes off when metal is detected. It is a 12v/21w bulb, powered by 12VDC. I have placed a heat sinked TIP120 NPN High Power Darlington Transistor 60V 5A TO-220 , a 2.2K 0.25W resistor and a 560R 0.25W resistor as shown in the circuit diagram on the right. Please ignore the left diagram for the LED. voltage readings for sensor with no metal detected: Between brown and black: 12.06/07V & -12.03/04V. Between blue and black: 0.0033V & -0.0032V (3.3mV & -3.2mV)  with metal detected: brown/black: -0.6/7mV & 0.7mV  Blue/Black: 11.96/97V & -11.93V Although the sensor is powered and detects metal ok, the bulb stays on. The polarity of tIP120 is correct and gives out heat ok. I can't figure out what I'm doing wrong so could you please see an obvious error?? thank you

Posted by nathanimate 3 years ago


Device to warn two atv's if they are getting too far away from each other

I'm trying to find a way to warn one atv rider if the other rider is getting too far away.  Basically a device that you could mount on each atv that would have a red light and a green light.  The green light would be on if both riders were like say very close to each other or up to 1/4 mile away.  If the atvs would get more than 1/4 miles from each other a red light would turn on letting the riders know they are getting separated.  Thinking a low power radio transceiver that every 10 seconds or so would send out a signal that the other would pick up so the green light would stay on, if they two radios were out of range and didn't pick up a signal after 20 seconds or so the red light would come on until they got back into range then the green light would come back on. Basically a warning device to let each other know if they are getting out of range.  An example would be two atvs riding on trails following each other.  If the atv following got stuck, broke down or stopped for any reason the lead rider would be alerted that the other rider is not in range so they could stop and wait or turn around.  Anyone know a device to do this or an easy way to build one. 

Posted by tlessard1970 5 years ago


adding a proximity detector to the mouse bot

Hello im new here and new to tech but i was wondering if any one could tell me how to add the simple ir proximity detector thts on this site to the mouse bot any help would be apreciated

Posted by yerok16 11 years ago


Radio Frequency Proximity Detector

Hello, Does anyone have an instructable for building a proximity detector based on a radio transmitter and receiver? Or some other wave based method? I've viewed the IR proximity detector here on this site, but I need a transmitter/receiver based one. Yes, this is for my pet. I have 2 cats and 1 dog. I need to keep the dog out of the same areas that the cats are allowed to go into, thus the proximity detector needs to be specifically tuned to the dog. Distance does not have to be far, anywhere from several inches to a couple feet. Appreciate any comments or instructables! Thanks, Eric

Posted by riccarr 11 years ago


can i use tv remote sensor in place of photodiode in proximity sensor circuit? if yes please tell me how

Can i use tv remote sensor in place of photodiode in proximity sensor circuit? if yes please tell me how

Posted by MukulB8 9 months ago


Small proximity sensors with short range and alarm either IR or RFID

I would like to make two key fob sized units that if brought within ~20cm of each other would sound an alarm from one of the units. I've seen a pair of key fob sized RDIF alarm tags that sound an alarm in one if moved more than ~10m apart. They sell for ~$50 US but I need something that accomplishes just the opposite from this device. I want to keep two pets away from each other (one bullies the other) and such a device would I believe accomplish this task. It seems like it should be relatively simple to design but I'm an artist and machinist and know little about electronics. I purchased a book entitled Practical Electronics for Inventors that has given me some knowledge about the basics of transformers, relays, capacitors, resisters, etc. but nothing on IR or RFID transmitters/receivers. Everything I read about RDIF is geared towards one stationary reader (or large hand-held unit) and one or more transmitters. I made one collar with an IR receiver from an R/C car and a small piezo alarm that would sound when I pushed a button on a remote. This works but only if I'm in the same room with the offending animal. I need something that works when I'm away or the animals are upstairs or in another part of the house. They are indoor only pets so the device need not be weather-proof. Anyone with knowledge of such things want to lend me a hand?

Posted by bigdaddyjt 8 years ago


proximity TO EACH OTHER sensors?

I've seen several instructables for creating proximity sensors that will detect anything, but I want sensors that will detect only each other.  Basically, I want to have LEDs inside tiny toys that will light when the toys are near each other, then fade and turn off as they are separated.  Can anybody point me in the right direction?  Thanks.

Posted by aliasjanedoe 4 years ago


Fire Proximity Suit Build - Keep Super Cool!

I am desperately trying to find a way to create a fire proximity suit. Picture https://commons.m.wikimedia.org/wiki/File:Fire_fighters_practice_with_spraying_equipment,_March_1981.jpg#mw-jump-to-license I have been looking everywhere for the alumizied fabric that is used. I want to make it more for prop purposes, or to wear on a really hot day. So it does not need to be flame proof! Anybody have any ideas on where I could fine or what I should be searching for? Thanks 

Posted by Mutant Tortoise 2 years ago


How to make an Ultrasonic Proximity Sensor w/ Vibrating motor?

Ok so I want to use something like http://www.parallax.com/Store/Sensors/ObjectDetection/tabid/176/ProductID/92/List/1/Default.aspx?SortField=ProductName,ProductName and http://tinyurl.com/cxlp8jz to create a small system that vibrates when an object is in the way of the detector. To elaborate, Something like https://www.instructables.com/id/Make-an-Attiny13-based-IR-proximity-sensor-for-2/ but using an ultrasonic sensor(for farther range) and a vibrating motor instead of an LED because I am looking to make something for the blind. So how would I build it? I can purchase any parts and just need some instructions like the project above provided. Thanks a lot for any help you can provide. Also , If I need to use a Raspberry Pi, I have one. My Skills? My skills are limited. I know how to solder and work with PCBs, But I do not know how to code a microprocessor. I know that I'd hook it up to an arduino to code it but I can't code. If someone can tell me where to solder the parts and give me a code, I'll be able to do it. Thanks alot for your reply. If someone does this for me, I would be very grateful and might even make some donations to you. :) So to summarize, I need code to program a microprocessor to make a vibrating motor vibrate when the PING senses an object. I also need some sort of a schematic. I will be very grateful and will be sure to give you acknowledgements when I do my project.

Posted by hackery21 5 years ago


Proximity key fob for motorcycle

Hey guys, I am working on a custom barebones motorcycle. I want to make the starting system incredibly simple by just carrying a keycard or fob that can be sensed within 4-5 feet of the bike which would allow me to just kick start it and go. I worked in access control before and to my knowledge the cards and fobs needed to be placed basically on top of a sensor to activate it, is there any way to give in just a touch more range? so just having it in my pocket would close the circuit and allow me to kick start the bike? wiring it in isn't a problem, I just need a switch that would sense a fob 4-5 feet away and close a switch. thanks! Rob

Posted by ApoX 5 years ago


Split Tesla coils anyone?!

I am collecting data in the form of old pics, patents, newpaper and magazine articles as well as just doing things.Tesla coils are fun but is anyone experimenting with the original "multiplying transformer" that Tesla created?And before you say, sure I have a Tesla coil......I mean:Large diameter primary coil with one part of the secondary in very close proximity while the other half of the secondary is located at the center ;)

Posted by Downunder35m 24 days ago


add proximity/motion sensors to any lamp.

Hello people of earth! I am making an installation about the Swedish summer. One of the main part of the installation are lights that react to you when you stand close to them. With react I mean, when one gets close enough, the lights should be switched on. if one leaves again, the lights should be switched of. Do any of you have an idea how this could work? I've been researching the web for ages, but with little result. Hope to get some feedback! Boris

Posted by Summer365 7 years ago


sensors microcontrollers

Hiya guys is there anyone that can guide me to finding an instructable that deals with interaction in remote places using a micro-controller. For instance people in 2 different locations in the world, want to engage or enhance social bond or interaction by using a motion or proximity sensor and internet of things for instance triggering a sound or an led light that can be sensed in a remote location. So one location motion is detected and the other location this detection can also be seen, if that makes sense? For instance similar to this kind of project  http://goodnightlamp.com/ Could this be done? Thanks

Posted by Snowcoat 2 years ago


Can anyone tell me what this device uses?

Hi everyone, Im really stuck at the moment. I've been racking my brains trying to figure out what sensor is used in this device and would love if someone could help me! The device is this:  http://www.ebay.ie/itm/NOVELTY-ELECTRONIC-PERSONAL-PROXIMITY-REMINDER-ALARM-/150412364558?pt=UK_Safety_Alarms&hash;=item2305468b0e#ht_964wt_952 I've bought one but cannot for the life of me figure out what exact sensor it uses. Thanks in advanced, Andrew.

Posted by Axial-Andrew 6 years ago


Selection of presence sensor

Hi guys. For one of my university projects I need to detect the presence of a person in the shower. In order to do that what I have in mind is use a proximity sensor. If the target is in a distance range (let's say 20 to 50 cm) It will assume that the person is in the shower when the distance measure is no longer in this range then it will mean that the person left the shower. I need to detect all the time of the person in the shower (meaning when he/she gets in and then out). I have read a lot of info and forums to properly choose the type of sensor. However I still don't have a clear answer. About the Ultrasonic proximity sensors I know that they are cheap and more accurate by it can be affected by Temperature, humidity and some ambient noise, all of them which happen in a shower. The other option an Infrared one gets affected by lightning conditions and the surface of the target. The last option I checked is a PIR sensor I know it senses Temperature of the target, but I don't know if it will be affected by the running hot water and also is more expensive. In general, I don't know how the running hot water will affect the detection of the person in shower. Also,so again I don't know how this will work. Sorry for the huge amount of  questions, I am a little bit confuse with all the factors to have in mind. I am hoping someone out there can help a lost newbie like me and give me a suggestion. Thanks a lot :)

Posted by mcamiea 2 years ago


Help needed into building a special type of proximity sensor...

Currently i am working on my final project for my study as an industrial designer. at the moment i am developing a product which will need to be triggered and activated by the motion of human hands. the product looks like a simple 6 inch cube which permanently rests on one side. the top side is reserved for other interaction. so what i am dealing with are the 4 remaining sides which surround the cube. the idea is that the closer a moving object [in this case a human hand or body] comes to one of the sides, the brighter the LEDs become. the range of this should be about 0 to 10 inches. the LEDs are not a problem, i just need a sensor that gives me a analog signal i can work with. and preferably this sensor will be behind a layer of around 0.2 inches of plastic material. does anyone know how this can be done? i just can't seem to find the right thing for my project. i heard an ultrasonic sensor might do the trick...but will that work stuffed away behind plastic? this would be great help for me, because i do not have a lot of knowledge on electronics to figure this out on my own. so anyone out there who can help me: i am on my knees right now hoping for a solution...any ideas will do!

Posted by igod 11 years ago


Arduino Car

Hi, So in computer engineering I've got to make a arduino based car, I've added a whole bunch of features such as IR tracking, obstacle avoidance(proximity sensor), optical tracking(follow a black line), and remote control through an android based phone. Since I'm a total newbie to technology I'm having trouble. I would appreciate it if You guys can point me towards resources and arduino libraries(for coding) that will work for me. Right now for coding I've only got basic pseudo-code setup since I do not know what libraries to use. I have searched up many sketches online and looked at them but didn't really understand any of the code. Here's the basic pseudo-code I got setup on the things that I've got to work on: DC Motor (4 of em for the wheels) (I also plan to add a stepper motor for turning right and left so if you could direct me on that as well) //Import necessary library //Setup the motors and pins //If signal for forward received //Code for moving forward //Set speed //Else If signal for backward received //Code for moving backward //Set speed //Else If signal for right received (keep turning right till stop signal received) //Code for moving right //Set speed //Else If signal for left received (keep turning left till stop signal received) //Code for moving left //Set speed //Else If signal for stop is received (Should we slow down to a stop or just stop?) //Code for stop //Set speed IR (I've got transmitting and recording diodes) //Import Library //Declare Pin for the IR Sensor //While loop: Move Right //If IR signal is received //move forward //Else //Jump back to top of loop Proximity Sensor (obstacle avoidance mode) (I might either use the one from Lego kit or buy a separate one ) //Import Library //Declare Pin for proximity sensor //While Loop: Send out sonar(echolocation or whatever) every second //Is there any obstacle?   //Yes, turn right so many degrees, and go back to while loop   //No, move on forward at set speed //If you’re surrounded and cannot exit send out a message through flashing LED's ________________________________________________________________________________________________________ I'm not asking for the code or for any of you to do all my stuff for me, I'm just asking for direction and resources. Thank You

Posted by Dark_Pheonix 2 years ago


Noise filter on iPod dock

I recently completed a project where i made my own iPod Touch charging dock for a set of PC speakers. While testing it out i noticed there is some background noise/feedback coming through the speakers any time the iTouch is actually charging. Is there any way i can shield against this interference? Or is the proximity of the headphone jack to the iPod connecter to much of a problem to overcome without alterations to the iTouch itself? I've notice this problem before while listening to my iTouch through it's speaker or headphones when it was plugged into a wall charger or PC. https://www.instructables.com/id/Laptop-Speaker-system-with-iPod-Touch-dock/

Posted by mpilchfamily 6 years ago


RIR Sensor with ~3ft detection capability?

Question for you sensor experts... I'm looking to do a project that would involve detecting when an item passes through a doorway near ground level (~6 inches above ground level).  Doing a bit of research it looks like a reflective infrared sensor would do the trick ... only issue I have come across is that there seem to be a slew of these sensors with detection capability of about 15mm max and then another class of these (home security grade) that have detection capability for several 10's of feet. Any ideas on a RIR sensor (links appreciated!) that has capability ~2-3 feet?  Another caveat is I'd like to string up multiple of these sensors in a close proximity, each with the sensor observing a 2-3 ft area right in front of it. Thanks! Nick

Posted by NickF73 2 years ago


Nerd Alert!

I am heavily involved in letterboxing. I've seen letterboxing posts here on instructables, but just in case it's not a familiar topic, it's a hobby similar to geocaching. Especially when we have events and get-togethers we will often engage in self-deprecating humor about our nerd status. For upcoming events I would like to create either of the following props, and would appreciate any ideas on how to approach them: (1) Nerd Detector--some sort of box that would have some sort of motion or proximity sensor that would trigger an alarm, siren, etc., when approached. (2) Nerd Tester--something akin to the "love tester" from old, old-school arcades. Someone would grip a handle, and some sort of meter or display would indicate the participant's (supposed) level of geekery. Thanks for any ideas!!!

Posted by Purple Chez 5 years ago


Find or How to Replace Old Dried Out Gaskets in a Set of 4 Ceramic Kitchen Canisters

We have a set of 4 ceramic kitchen canisters that are so old the foam seals, or gaskets, have dried out. I cannot find replacement gaskets anywhere. They were made by an individual, so there is no company to write to for replacement parts. Does anyone know who sells such gaskets? Foam or rubber or silicon will work.Or, is there a way of making replacements? I've seen amazing things done on "instructables" with silicon; molds, fake heads, toy octopus, etc. But I have never worked with it. Is it OK for a seal that will be in close proximity with salt, sugar, flour?The canisters are glazed ceramics that some individual has made.Attached are photos of the canister, mating surfaces, and existing gasket.Any suggestions will be appreciated.Thank you.Phil Brown, Southwest Wisconsin

Posted by oghk2000 4 days ago


bar fridge and footstool in one?

My husband really really wants a footstool for his potato couching comfort. He has also always joked about wanting a bar fridge in the lounge for keeping his beer in close proximity to the TV. (he's a lovely but lazy lazy man). I am NOT the 'handy' type, but I do know one end of a screwdriver from the other (just). My first thought was just to tip a bar fridge on it's back and cover it with fabric so that iyou would lift the 'top' to get to the fridge part, but the 'what-cha-ma-callit' at the back of the fridge (the coil looking bit) would be on the ground.. now I am a natural blonde but even I know this is not a good idea! If anyone has ANY ideas on how to go about combining the 2 I would be very very grateful, and my husband would have the best christmas present ever! I am especially looking for any ideas using the KISS principal. thanks!

Posted by jag5000 9 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


Can I use instructables as a referee

Hello, This might seem like a very strange question.  I am looking to apply for a bursary from The Worshipful Company Of Turners. They require two referees who are happy to stand by my skills and character.  I have already asked the chairman of my local wood turning club who I think would be a great traditional reference for me. But I think instructables would be an awesome reference to show a wider reaching impact than most people could think of. (Hopefully this could give me a bit of an advantage over people who might pick only people who happen to be within a relatively small proximity).  I hope that my engagement within the instructables community will leave you feeling very positive about backing me up for this application.   I would require a name address and post code in order to use instructables within this application and would really love to be able to do this.  Kind regards, Philip Bradley / AKA World of Woodcraft PS for more information regarding the bursary here is a URL  http://turnersco.com/turning/bursary-awards/

Posted by world of woodcraft 3 years ago


Wanted: Infrared Laser Tag Technology for a New Drone Game

Hi, I'm looking for someone to develop infrared laser tag technology that enables drones to chase, shoot and record 'hits' on participating drones.      Here are the features I'm looking for: a)  Used primarily indoors to avoid problems with FAA, BVLOS, wind etc. b)  IR LEDs detectable @ 30 m c)  Indicates 'hits' by light and sound d)  Detection proximity + -  12" diameter e)  FPV not required for MVP- line-of-sight ok f)  'Shield' feature preferred g)  Self contained rechargeable battery h)  Smartphone integration preferred i)  After a certain number of 'shots', cannon briefly disabled    If you are an laser tag developer and this is something you can do please get in touch.     I will pay, or glad to cut you in on a Kickstarter / crowdfunding campaign revenue share if you prefer (or a combination of both).  I'm a Kickstarter specialist and plan on featuring it on a crowdfunding campaign.    I don't come onto the board very often, so please email me directly at: Earl Brown ebrown@combathawks.com 805-984-2925 Santa Barbara, CA  USA

Posted by EarlB7 2 years ago


Fun uses for Reed Switches?

Reed switches are electro-mechanical devices that opens or closes a circuit when a megnetic field is present. They come in normally open and normally closed designs and range from the size of a grain of rice all the way up to several inches long. A relay, another electro-mechanical device, is comprised of a reed switch and an electromagnet trigger built into one housing. Common uses for reed switches (not counting relays which are used in virtually all electronic devices) include the 'pick ups' on bicycle computers and the sensors on window and door alarms. I just ordered a bunch of reed switches and I need your help in coming up with ideas for what to do with them. Post up your ideas for some things that could be made or modified to be triggered by a magnet coming in close proximity to a reed switch. Remember- the magnet does not have to touch the switch, just get close enough that the magnetic force trips the switch. The stranger and sillier your ideas are the better. Note: this is not a contest and there are no prizes. by posting an idea you are giving your consent for anyone who reads it to use your idea. Posts about integrating reed switches into knex firearms will be ignored (no offence, it's just not my cup of tea).

Posted by Handsome-Ryan 10 years ago


Safe removal of a ~30' HAM Radio Antenna

Hello all, I have a friend who has a 30 foot (approx) HAM Radio antenna mounted on his garage.  The pole base attaches to two brackets which are anchored to the exterior wall of a garage.  Near the top of the antenna, 3 cable anchors connect to brackets on the roof.  He wants it gone, and wants me to take it.  But, this must be planned out carefully.  The pole could be lowered 3 feet or so, so it makes contact with the ground.  It could be used as the fulcrum to lower this down into his backyard.  Power lines are not in proximity.  If several people were on the roof, could that point be used to lower the antenna gently to people on the ground?  My concern is that the construction looks aluminum. The pole is 2" steel pipe.  ButI cannot be certain on the actual antennd contruction or weight.  There are 3 or 4 small boxes mounted at various heights on the pole.  I can't image they weigh too much.  Can anoyone tell me what there are used for?  Occasionally, a red led will blink on the bottom of the case. I am excited to acquire components that one day may help me get my amateur license.  But I am concerned about how to safely do this, and will not attempt without a very clear plan.  I don't want it to end up being too heavy, and slingshotting the people on the roof (like something that would happen to red green).  I also need to insure his roof is not damaged.  I think the brackets will be left on, and the cable cut at the base.   Any knowledge is greatly appreciated!

Posted by huck alexander 6 years ago


Tarantula Defends Territory Against Owner; Owner Almost Blinded

Got a pet tarantula? Better protect your eyes ----------------------- WASHINGTON Fri Jan 1, 2010 10:53am EST WASHINGTON (Reuters) - Here's some advice stemming from the unusual case of a man who had spider hairs stuck in his cornea: Be sure to cover your eyes when hanging around with your pet tarantula. Ophthalmologists at St. James's University Hospital in Leeds, England, used high magnification lenses to find out what made the man's eye red, watery and light-sensitive, according to a study reported in the British medical journal The Lancet on Thursday. They discovered hair-like projections stuck in the man's cornea. It was a light bulb moment for the patient, who remembered that three weeks earlier he had been cleaning a stubborn stain on the glass tank of his pet, a Chilean Rose tarantula. "He sensed movement in the terrarium. He turned his head and found that the tarantula, which was in close proximity, had released 'a mist of hairs' which hit his eyes and face," the doctors wrote. They said the man's condition was rare. The authors noted that the Chilean Rose tarantula releases the barbed hair on the back of its body to defend against predators. "We suggest that tarantula keepers be advised to routinely wear eye protection when handling these animals," the doctors said.   ----------------------- Ok, so he might not have been blinded, but in theory, he could have developed a horrible infection that could have blinded him.  I'm listing tarantulas next to porcupines as pets to not own. Image Credit:  David Thorne  

Posted by AngryRedhead 8 years ago


The Eco Powerplant

  Creating a Permanent IcePack in the Eastern Sierra A permanent Ice pack in a north south valley of the Carson Basin could insure constancy of water supply to Fallon area farmers and ranchers. Creating a permanent icepack in Northern Nevada is technologically and economically feasible, given the right location . This project will be solar powered, and serve as a peaking unit during times of high electrical demand. This technology will produce energy from solar by PV Panels mounted on a giant spanning grid over a north south valley in the eastern Sierra. A properly excavated mine could also serve as a location. Proximity to gas distribution and an electrical sub line are also important . This facilities' economic importance as a producer of LNG from surplus stock cannot be overstated. The upper part of the oval consists of a space grid spanning the valley or excavation. It is covered with steerable PV panels. The PV panels may be inserted into the grid or used to create liquid air , which in turn can be used to produce LNG. The thermal energy storage as liquid air would be contained underground in the mountainside itself.In Northern Nevada, these mountains are usually solid rock formations imbedded in sandy detritus, an excellent insulating material. Vast amounts of wind power are also available during spring and summer.   During summer peak demand, liquid air could be re expanded to run generators.   And most importantly , this plant will produce as a by product of its operation large amounts of water in the desert by freezing the ground on which it operates. Wet air passing over an expanse of frozen mountain rock will condense, and either form ice or rain. The production and maintenance of a liquid air production and re-expansion facility will also produce large amounts of water during times of high humidity.   Suitable locations in the Eastern Sierra would by necessity by close to either the Truckee or Carson River Basin.    

Posted by Mud Stuffin 6 years ago


Research on DIY: Looking for Volunteers in- and around Amsterdam

Hi all, My name is Tal Amram, graduate student of Industrial Design at the Delft University of Engineering. For my graduation assignment I’m setting up a study about the potential benefits of ‘connected objects’ in an Internet of Things for creative processes of the Maker community. More specifically, I am aiming my study at ‘Home Improvement’, interpreted also as the making of furniture, lighting, home decoration or domotics.  For this study I am looking for volunteers in Amsterdam (or its proximity) to execute a small Home Improvement design assignment (for your own home) that takes a week, on which you will spend about 20-30 minutes per day. You eligible if you have experience with making things to improve your home environment and have worked with 3D-printers before. You will be provided by me with a package that contains a logbook with short assignments and some materials to use for simple prototypes or inspiration. This week starts on Monday, November 23rd and ends on Monday November 30th with a session in the Waag FabLab from 19:00 - 20:30. During this session, I will host a group discussion with all six participants during which we will share our experiences and discuss our separate processes. I will reserve the 3D-printer for (- and preceding) this session so as to make it possible to materialise your design. I would love to hear if you, or perhaps anyone you know, would be interested in participating in this study! Please contact me via my e-mail address as provided below. Feel free to contact me also in case you have any questions or remarks about this study or my project in general. t.amram@tudelft.nl Best Regards, Tal Amram

Posted by talamram 2 years ago


Using Arduino For Communication Device?

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

Posted by kugarweb 7 years ago


Interactive lights with sensors and such

I am currently working of my BFA in sculpture and I have a couple of gallery shows coming up and it would seem that my ideas are bigger than my knowledge base (which is okay by me, but sometimes frustrating). My current work revolves around posthumanism and I am working to blur the lines between human and machine, working with circuitry, xrays, and prosthetics. I have one set of work that I am currently a bit stumped with. I have three copper PCB boards that I am going to etch into circuits, but the lines of the circuits will resemble human faces. Each board has a character: the introvert, the extrovert, and the antagonist. The introvert will be silent, but I want the lights that glow behind it to flicker faster, or get brighter when the viewer nears. Essentially, he is quiet, but has a LED driven anxiety attack when people approach. I did this with a dark sensitive photosensor thinking that the viewers shadows would activate the light. While it worked in my living room, I realized that the gallery lighting would not lend itself to this method. So my next thought was a theremin that had light output instead of sound output. Possible? The next two will make sound and light. The extrovert needs to seek attention. I was hoping to figure out something that would talk back when something is making noise around it. So it would need to pick up the vibrations of someone talking about my work, or possibly even their footsteps, and then begin to "talk back" (lighting up and making noise). Intstead of sensing vibrations I was thinking that proximity might be easier so maybe an IR sensor. (?) The last one hate the second one. I was thinking I might be able to do something like this with a kit I have that allows me to plug one circuit into another, , where I would have it sense the light or sound coming from the extrovert and in turn verbally assault him. However,it is not a definite go, still lots of kinks so I am up for any solutions. I hope this is somewhat coherent to you. If you could give me any leads on where to start, or any places to get good information/products, that would be immensely appreciated. Thanks for your time!

Posted by idaholaura 9 years ago


<5mm distance sensing, <100micron accuracy, GUI, RasPi or Arduino?

Hi there, I am trying to keep my hardware/ coding skills alive and spruce up my bicycle wheel truing stand. I need to figure out the required hardware + software for the following: I want to build a non-contact distance measurement sensor system and get the output "into" my computer for display in a graphical user interface. I know I could omit the latter step with going directly onto a mini-LCD screen, but trying to use this a learn-another-programming-language learning experience (I've coded Matlab galore, pondering Python for this project). General system components: Sensor - [something - RasPi or Arduino I guess] - laptop (running debian) - GUI displaying continuous sensor reading Sensor: I've web-searched the hell out of this, but not finding anything quite answering my questions. I want to continuously measure the distance from the sensor to a bicycle wheel rim braking surface. Material is aluminium, shiny, though not smooth. Biggest problem with the web-search is being swamped by proximity sensor results (on/off) rather than a distance proportional output signal and much lower resolution projects. I rule out IR or optical sensing, now stuck between ultrasonic and inductive sensing, though tending to the latter for a faster response/adjustment to change time. Sensor criteria (other than reasonable $$): - total sensing range: ca.5mm - sensing accuracy 10 to 100micron/ 0.01 to 0.1mm - don't ask if that's needed, a bit of overkill, I know, but a bit of OCD doesn't do any harm, eh? - fast-ish sampling rate (so that when I turn the wheel, the number on the screen updates nice and fast, guess >25Hz is sufficient). [Something - RasPi or Arduino]: I know that I could omit the laptop GUI part (mini-LCD, LED array, etc), but keen to learn/ practice a little Python with this project, so I guess I am tending to the RasPi, but I am open minded. All I want is the analogue sensor out to end up as a digital reading "inside" my computer to be passed to my GUI as a reading. Essentially a mini A2D converter. Not fussed whether the output is in actual distance units or in arbitrary units/ current units (I guess the sensors put out a proportional current signal?). GUI: Depending on the above, how do I best get the signal "into" a Python program? A moderate fast sample rate >25Hz should suffice.  Any help with this would be greatly appreciated! LaserCycle

Posted by lasercycle 3 years ago