Metal detectors.

Ok so I want to get a metal detector. But i don't want to spend a fortune but don't want to spend $10 for a stinky one. I'm looking for one for around $50. I just want to look around my yard,and see if theres anything interesting (once i found a little diamond or some kind of rock).

Posted by Easy Button 11 years ago | last reply 3 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 | last reply 6 years ago


How to make a metal detector?

Pheewww.....SCIENCE project!!

Asked by 97shreyag 5 years ago | last reply 4 years ago


How does lie detectors create kinetic energy?

How do Lie Detectors create Kinetic Energy?

Asked by 9 years ago | last reply 9 years ago


add piezo to motion detector light?

How do I add a piezo buzzer to my motion detector light?

Asked by bennyb1 9 years ago | last reply 9 years ago


Metal detector schematic? Answered

 I'm looking for an amazingly simple metal detector schematic, anyone?

Asked by 2tautges 8 years ago | last reply 8 years ago


how do you build a pinpointer metal detector?

When metal detecting,after locating an area with your metal detector,you can pinpoint the coin or ring easily with a pinpointer detector. Garret metal detectors manufacture and sell one called the garret pro-pointer.

Asked by 9 years ago | last reply 9 years ago


How to make a bomb detector?

I have a science project to make. I need a working model... HELP!!!! :( Thanks!!

Asked by 97shreyag 5 years ago | last reply 5 years ago


Is there a standalone bluetooth detector?

Asked by Art4Med 8 years ago | last reply 8 years ago


How would I make a bug detector?

Is it possible for a diy-er to build an ir detector to find bugs, cctvs, etc?

Posted by Lithium Rain 10 years ago | last reply 7 years ago


how to make a simple metal detector?

Give me plans and circuit digram for a simple metal detector.

Asked by robot1398 7 years ago | last reply 4 years ago


Pulse Induction metal detector ?

Hello Excuse me I want help in making Pulse Induction metal detector because I need in it in a minesweeper robot so any help Plz Thanks a lot

Asked by mohamed100 6 years ago | last reply 1 year ago


metal detector

​i want to make a metal detector using tda0161, when the detector detects the metal from a specific distance the buzzer sounds but as the metal comes near and near the buzzer sound increases!! so anyone guide me for this i want to use this with arduino and to interface it with matlab and want its code too!!

Asked by mati ur rehman 3 years ago | last reply 3 years ago


Infrared detector curket. Would this work? Answered

I want to buld a ir detector. Would this curket work?

Asked by David97 7 years ago | last reply 7 years ago


How to hack a smoke detector's alarm to change the sound?

I want to change the alarm sound.

Asked by sheen16 5 years ago | last reply 5 years ago


Hello, I have a motion detector that is normally closed and opens when you trip it, how do I reverse this?

The motion detector is a plain security one (without a light)

Asked by Modarius 9 years ago | last reply 9 years ago


how to make long range gold detector?

Asked by 9 years ago | last reply 8 years ago



How can I make a motion detector sprinkler ? Answered

I need something like the scarecrow motion detector sprinkler. Had one work great for the elk, but it is worn out. At $60.00 I can not afford them.

Asked by alfonz 9 years ago | last reply 9 years ago



smoke detector piezoelectric transducer hack?

I'm thinking of building a basement water leak detector like this: http://www.mrroot.net/2009/10/water-detection-circuit/ I wanted to hook it up to something loud like a smoke detector. Is it possible to take adapt the piezoelectric transducer circuit with the water sensor? Any guides. Thanks

Asked by phillyj 6 years ago | last reply 6 years ago


tell me about the cheapest proximity detector?

Asked by parekh maulik 9 years ago | last reply 9 years ago


I need plans on how to make a metal detector for beginners?

Hi, I want to make a decent metal detector. I would love it if someone could explain how in an easy to understand way, as I'm a beginner. Please help! Thanks.

Asked by 9 years ago | last reply 8 years ago


how do i make a bug detector?

Asked by jxuxdxgxe 9 years ago | last reply 7 years ago



How to make a cigarette smoke detector

I have searched for a cigarette smoke detector circuit. But  can't find one. I need it for my research project.. Pls. help me.thanks! :)

Asked by jhenna 7 years ago | last reply 3 years ago


Solar powered Light with Motion detector alarm for inside the house? Answered

I have a Solar powered Light with Motion detector on the front of my Shop, The shop sits in front of the house,straight line of 50` away, I would like to know when the Motion detector has turned my light on by way of a buzzer? LED? or combination of both, I would appreciate some ideas on how to do this. 

Asked by 1Wally 2 years ago | last reply 2 years ago


Can I Connect A Metal Detector Coil Directly To A Arduino? Answered

I have always wanted to make a metal detector using a arduino but I thought I could harm my arduino by connecting the metal detector coil directly to my arduino so can I directly connect it with my arduino or I have add some circuit before it if yes what would be the circuit?

Asked by Bot1398 6 years ago | last reply 2 years ago


Defeating Metal Detectors at Concerts? Answered

I plan to bring a camera to the future concerts of a singer. I believe fans have a right to do so. The camera will be hidden from sight, but I need a way to shield it from any metal detectors that may be used. Using a metal detector designed for coins, I found that steel wool can hide steel items from the detector in ferrous mode. But switching the detector to non-ferrous mode quickly reveals the steel wool. I have found no other material that has any desired effect. Perhaps I could carry something that transmits a jamming signal to the detector. Has anyone here had experience working on this problem and can offer a solution? ~Bob~

Asked by ShutterBugger 9 years ago | last reply 4 weeks ago


Advice; How to convert a smoke detector to use a recorded message

Hi, First post...be gentle! Trying to find someone to guide me through converting a normal, off the shelf, home smoke detector so that it emits a pre-recorded message, rather than the usual siren. Anyone? Thanks Naldo

Posted by naldo58 2 years ago | last reply 2 years ago


How can I build a smoke detector that sends me a text message?

I'm a little OCD about lights being off, the stove being off, etc.  I've seen ads for products in the UK for smoke detectors that can send a SMS message to up to 4 phone numbers.  Anyone know of a way that I can hack a current smoke detector to do the same thing?  

Asked by octobermatthew 6 years ago | last reply 6 years ago


how do I change the battery in a hard wired smoke detector?

Asked by dsu76 9 years ago | last reply 9 years ago


I would like 5 environmental sensors linked to an Arduino then to my smart phone or an Ipad. Is this possible?

My idea is to have a radiation detector, emf detector, static ion detector, radio wave detector, and temperature gauge going to an Arduino, and it reading all 5 detectors at the same time, giving simultaneous readings of the immediate environment.  The device would give readouts in real time onto my smart phone or an IPAD, recording the data for later reference

Asked by ghostman1029 6 years ago | last reply 6 years ago


Easy way to get IR LED detectors?

I need a large quantity if IR detectors for free or very cheap. Are there any god sites that give samples or anyone here that has a large quantity they don't want?

Asked by XOIIO 9 years ago | last reply 9 years ago


Infrared Detector

Hello Everyone  I'm making a coil gun and not sure how to make a infrared detector, so when my projectile is going down the barrel an infreared sensor will detect the projectile and activate the next coil. Thanks Everyone 

Posted by jackopiny 4 years ago | last reply 4 years ago


Echo Location / Arduino / Michropones

Hello guys, So, I´d aprecciate if you could give me any ideas about echo location using microphones or ultrasound detectors, the idea is to put three or four sound detectors and put any object in the middle so that way because of the sound I could know where the object is, by using the detectors

Posted by JoséG100 3 years ago | last reply 3 years ago



can a smoke detector be modified to be so accurate to detect cigarette smoke in a small room?

In my small 12qm room i wanted a kind of smoke detector to say when the smoke is too much and i should open the window, like when it stinks.. cuz smokers in a smoker room dont smell it anymore.. guess few of u still know that =)would love to hear some answers or suggestions(and no im not looking to modify a already there smoke detector.. ill buy a new one..dont worry)

Asked by xgl0baltk 9 years ago | last reply 9 years ago


Twitter share button - error in url

Hi The url to update status on twitter is wrong. It's  "/#!/" in the url that should not be there. https://twitter.com/#!/?status=Find+home+detector+http%3A%2F%2Fwww.instructables.com%2Fid%2FFind-home-detector%2F The correct url for update twitter status is https://twitter.com?status=Find home detector http%3A%2F%2Fwww.instructables.com%2Fid%2FFind-home-detector%2F /Marcus

Posted by _macke_ 7 years ago | last reply 7 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 | last reply 11 years ago


how to make a metal detector sensor with high sensitivity for a small metal object ?

How to make a  metal detector sensor with high sensitivity for a small object exampe size object metal 1mm     typically used for metal detection sensors on the safety of food for consumers

Asked by RickyS18 3 years ago | last reply 3 years ago


how to make a metal detector sensor for high sensitivity

Hi everyone Could you please help me... : ( how to make a metal detector sensor for high sensitivity examples of metal objects the size of 1mm the use of these sensors for metal detection in food security

Posted by RickyS18 3 years ago | last reply 8 months ago


Lie Detector

I want to make a lie detector with my Arduino. I know that when people lie, their skin is supposed to change its resistance. What kind of change are we talking about? I know I can monitor the light in a room with a photoresistor, but how would I go about doing this?

Posted by Login258 9 years ago | last reply 6 years ago


Mechanical first rain drops detector?

I am looking for a mechanical' 'way of detecting the first raindrops of a shower or worse. This detector then releases a mechanical alarm, which will alert folk who keep their washing on the line as long as possible, to bring it in.The alarm could be sounded by a gravity falling weight (rock) or rewindable spring, driving a rattle, for example.If possible, a windmill action could generate the power to reset the weight.No electronics to be used in this if possible.

Asked by Raymondo 9 years ago | last reply 8 years ago


The secret knock detector workshop door

Check out this great knock detector build by BFarn. It was inspired by the great secret knock detecting door lock ible by Grathio I'm extremely impressed by the design and technique's he used to make his own knock detector. I mean Grathio's detector was already awesome but this one just makes it a beautifull piece of art and also limits the area where can be knocked (which is a plus on security for me). So even when somebody accidently overhears you knock they still won't know where they should knock to get the door open! Check out the video to see it in action and for more info on the build you can visit his website here

Posted by MichelMoermans 8 years ago


how to connect a handsfree to a ring detector for the DTMF tones transmition??Cut out the earphone?

Im doing the cell phone control mobile robot...

Asked by akirawind 9 years ago | last reply 8 years ago


PIR motion detector

My roommates and I decided that we wanted an electronic project to work on and we chose to try out making a motion detector. The only thing is, we really have no idea how.We have this PIR sensor, a small PC board, some wire, a buzzer and soldering equipment.My question is, how can we make a motion detector that buzzes when it senses motion? What more do we need to buy?We have looked online but couldn't find anything for people that really have no idea what to do.Thanks for any help!

Posted by gohuskies 10 years ago | last reply 10 years ago


Model Train Track detector Updated twin-t model train track detector circuit parts list?

Model Train Track detector Does anyone know what the parts are for this updated twin-t model train track detector circuit? See Fig. 5-5 in "Easy to build Electronics Projects for Model Railroaders"I checked twice with the publisher for the missing parts list in the article but never got a reply. C1 - ?? , C2 -??, D1-D6 - ??, D7 - ?? Q1,Q2 - TIP 142 R1 - ??, R2 - ??,R3 - ?? Thanks, AB

Asked by brownart 8 years ago | last reply 8 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 | last reply 7 years ago


pic16f887

Can any body help me to connect rain detector by  pic16f887. i am close to programmimng but not work well. can any body share any idead?

Posted by PrashantV24 1 year ago | last reply 1 year ago