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


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


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


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


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


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 2 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


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


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


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 2 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


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


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 9 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


Radio or wi-fi motion detector

I would like to build (from easily available materials) an outside motion detector that would alarm if anyone came  into my carport at night. Battery powered (do not want to have to do house wiring), motion or ir sensitive (whichever gives range), sits somewhere outside in carport and  when activated broadcasts signal to turn on buzzer or other warning device in house bedroom, 100 ft or so away from detector. I do have an available electrical plug in the carport so I could use that for power instead of batteries if needs be. Does this stimulate anyone's creative juices? Thanks 

Posted by dkhaliel 6 years ago


Recording ultrasonic sound

I looked up at bat detector, a device that converts ultrasonic signals into audible sounds. Most bats produce high frequency calls which are often higher than a human ear can pick up. A bat detector picks up the frequencies and then converts the sound into a lower, audible frequency. I was thinking if I could get a bat detector, I use it to capture the ultrasonic sounds.While bat detector could pick up these high frequencies, it would be interesting to see how it will pick up the faintly heard, to human ears - sounds of the industrialised areas/city or even at isolated/quiet areas. The bat detector I want to use is this - http://www.magenta2000.co.uk/acatalog/B ... _Bat4.html I'm thinking of hooking up the bat detector to a digital recorder and a binaural microphone and capture the sound through those equipments. I would greatly appreciate your suggestions/opinions on this matter.

Posted by drifterocean 4 years ago


Internet failure detector?

Hi everyone - this is my first post and I hope I am posting in the right place! I want to be able to detect when my PC loses internet connection and be able to signal an actuator to drive a motor. Does anyone know of any software that can do this on the PC itself or a standalone project that can be used to do this? thanks for reading!

Posted by srowland2 4 years ago


Bird box visitor's motion detector

Hi, I'm looking for a motion detector with difference & wonder if anyone has any bright ideas. I have setup a bird box on the side of my house & it's early spring here in the uk. I'm only getting occasional visits from a bluetit couple & would like to know when the're home.An initial idea is to check the brightness of the video image. It's monochrome so the brightness reduces dramatically if a bird is home. Any ideas how I can acheive this?bird box link

Posted by waldy 10 years ago


3D photo-tours of LHC and detectors on the Web!

New Scientist reported today on an online exhibit of 3D-navigable photographs of the LHC and associated experimental detectors. Very, very cool!Even more interesting are the bizarre anamorphic images which pop up when you navigate between the pages of the exhibit. These are apparently the originals from which the navigable pages themselves are generated.

Posted by kelseymh 9 years ago


CO2 gas flow detector

Hi all,  I have a 1/4 inch id plastic pipe fed by co2 at very low pressure, normally there is no flow,  but when there is flow (actually suction) I want to to operate a switch that allows flow from the source gas cylinder.  Can anybody help.  A friend can help with making components on a lathe.  Thank you.

Posted by grandad45 2 years ago


IR (infrared) "motion detector" of sorts, need help please

I am looking to build a sort if motion detector that works with 2 IR emitters, 2 IR receivers and a motor, the emitters and receivers would be  in 2 seperate circuits and lined up with eachother  (the emitters constantly on) and when the link to the receivers was severed (for example by someone standing between the emitter and receiver) the motor would rotate, if the left emitter-receiver combo was disrupted it would apply positive voltage to the motor and if the right emitter-receiver combo was dusrupted it would apply negative voltage, is this even remotely possible? Firezone

Posted by firezone 9 years ago


Metal Detectors

Hey I wanna get into metal detecting, just for fun. I have about a 200-250 budget. I was looking at the Garret 250, but I really don't know what to get. Does anyone here have a recommendation, or something? ,Dano

Posted by TheCheese9921 11 years ago


How to Re-route 9 Volt Batterie from Smoke Detector

Hello, We have 14 feet high ceilings and smoke detectors in 4 rooms at that height. Not wanting to crawl up the ladder to switch the 9 Volt batteries, one would think you could simplify this task. Use a 9 volt battery connector to connect to the battery ports in the smoke detectors, a wire each to a central point in the house, such as a hall closet, where each wire ends in a 9 volt battery box. I can find various 9 volt battery connectors to purchase, have umpteen yards of low voltage wire (from sprinkler system installation). What I don't know is, is there a limitation on the length of wire I can have a 9 volt battery on one end, and the smoke detector on the other end? Thank you. Stefan

Posted by StefanGH 5 years ago


What parts to salvage from detectors?

Hey all - at the place I manage I have 15 defective Kidde smoke detectors coming back - now obviously there's something wrong with them but it won't be every part that's garbage. It IS however a good opportunity to get some multiples of same parts.  SO - if this was you and they are in the garbage otherwise..which parts would you salvage?  I'm willing to invest  maybe 2 hours of desolder time.  Other than the resistors and the LEDs, i'm not as familiar with the components used on these boards. suggestions appreciated, This looks like the closest model: http://www.kiddecanada.com/utcfs/Templates/Pages/Template-53/0,8062,pageId%3D28537%26siteId%3D463,00.html

Posted by Golftester 6 years ago


Mobile phone signal Detector

I want to know if there is any 'mobile phone signal detector' already available in the market. The purpose is to find if anybody is using mobile phone for calls or messaging at restricted places. Jammers are not fine as some are exempted from making calls etc.. If there is nothing like that available, how to make one to detect the signal or even the phone from which the signal was emitted. Usually when we are about to receive a call or sms and if we are near a Speaker we get a specific noise through speaker, or if we are near a monitor (CRT) it flickers.  So I am sure there are ways to find this signal emission. Please suggest the options to do this....

Posted by donjoy 7 years ago


Can I add a pot?

Hi. I have a metal detector and it can be quite loud when it finds a target. Unfortunately, there is no volume adjustment on it. I don't have a lot of experience wiring pots into circuits so I wanted to ask before I try something and damage my detector: Can I wire a pot inline with the speaker? And if so, would I ground it to the negative side of the battery pack or would I ground it elsewhere? Thanks in advance!

Posted by fosgate3 1 year ago


Chips in smoke detectors

I have a bunch of smoke detector circuit boards all of which have IC chips. All of them have slightly to widely different numbers, some Motorola, a philips, etc.  The main question I have is what type of chips are these as far as function goes? I tried looking these up but so far nothing absolute. Some numbers I remember are 8506, 8605, 8502; other numbers are way different and I don't remember what they are.

Posted by eramsell 1 year ago


LeakFrog disassembly?

Has anyone successfully disassembled a LeakFrog water leak detector? 

Posted by arpruss 3 years ago


IR laser detector alarm

With the new Infrared laser pointers etc. there is no way to tell if light is on or not. I think there is a need for a IR laser light detector that is small enough to fit in your pocket and could be clipped to your shirt. If a IR laser was pointed in your direction the sensor would chirp or make a noise. I've noticed several places selling IR laser pointers. I think they are dangerous and very little use for them, since they are invisible. Anybody want to make one? If you do I want one.

Posted by paduckaartist 10 years ago


Motion detector controling LED

I would like to know how to combine narrow width motion detector to control LED Say putting two sensors side by side and each controlling independent LEDs. Not sure how to go about it. Is there kits available that I can modify? Also, I thought about using IR but I dont want to break a beam rather I hope make something thats like any outdoor motion sensor light but in a small scale that can control each LEDs. Any leads? I got almost zero experience in electronics. Well, if you count elementary school elec class that I took but forgot everything about it. thank you

Posted by jifjif 11 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


Wiring, DSC PC1832 security system at home, how?

Http://www.nlcpr.com/images/PC1832_lr.jpg Hey, hope somebody can help me to getting this thing work properly, im not sure how to connect the keypad, smoke and move detectors... i got 3 zones to move detectors(means that in one floor i got all detectors joint on one wire, and now, where on that board i put red and black(+12 and -) yellow and blue(NO and C) That picture is not my taken, found it on inthernet. Thanks for any help:) Sorry for my bad english.

Posted by blackrock112 8 years ago


Audio Detector

Is there some type of electrical component which detects high frequency sounds like those mosquito ring tones? I've looked around and seen things which apparently detect high frequency radio waves, but that isn't really what I want (at least I don't think it is). Thanks in advance.

Posted by brickzima 10 years ago


Smoke detector and ozone generators / air purifiers

I recently made a quite disturbing discover and thought I share it here so other are aware of it. We all love to protect ourself in case of a fire and the first and most vital of the information chain is a working smoke detector. In my house I had the old type installed, based on a radioactive isotope that detect smoke through ionisation. The newer types working optical or using combined optical and isonisation detection should perform better - but does not really matter for this "warning". If you do have pets, smoke in the house or just do a lot of cooking you might also use one of these fancy air purifiers that use Ozone to clean the air in your room. I only have a tiny unit for a fish tank that I also use to remove smells from my work clothes or purify some water for the plants. My discovery started with a simple cooking exercise involving a lot of onions, garlic and a big wok. To avoid filling the house for days with the smells I had the ozone generator running as well. At some stage I noticed that the whole kitchen was covered in the fumes from the cooking, nicely visible from the hallway - like fog. To my surprise the smoke detector did not the usual alarm but performed fine with the test button. So I blew some cigarette smoke directly at it - still no reaction. Next day I started to investigate and was prepared to buy a new detector but whatever I used, smoke, steam or just killing a burning candle underneath cause the alarm to go off. Then it hit me: The ozone! A quick test with the hose of the ozone generator next to the smoke detector and no matter what I blew in it the device staed silent. Ozone is ionized oxygen, the detector uses the ionized particels from the radioactive material to detect smoke. Smoke or very fine dust / steam will bind the ionized particles forcing the electronics to sound an alarm because the sensor no longer detects the ionized particles. With enough ozone entering the detector there will be always enough ionization to prevent the alarm. Conclusion: If you do use ozone in your house upgrade your smoke detector to a model that uses optical AND ionisation detection! Otherwise there is a good chance that the device is unable to detect a fire. Of course chance are slim that you would use the ozone while sleeping and a fire starts, but if it does....

Posted by Downunder35m 3 years ago


Looking for: Metal detector for Non-Ferrous metals.

Hello, I'm looking for a detailed schematic ( or two ) on a metal detector capable of locating non-ferrous materials to an extent. ( titanium in specific )  I recall finding a fair bit of documentation on such a thing a few months back, but I can no longer recall the exact method that they used. If anybody knows where I can find some detailed information and/or schematics I would very much appreciate it.  I have a reasonable amount of experience in building somewhat complex circuits, and can learn what ever I do not yet understand, hopefully. ;) I have a very good object to test such a device on, should I manage to build one. It's something I keep close to me at all times, and goes wherever I go.   ( that sounds kind of like a riddle ) On a side note; anybody had Deja Vu over four times in an hour? I think my mind is running in loops. Any help or insight would be very much appreciated.  -Jake

Posted by jacob5680 7 years ago


Human Detector

I'm trying to come up with a small, cheap, simple circuit that will detect a human. I plan to use a grid of luxeon rebel OLEDs and whatever detector I come up with embedded in my ceiling to light up only when you are under them. I've looked into passive infrared, but it's fairly expensive for the components I could find. Any leads for circuits, ideas, or parts? I'd use parts from cheap security lights, but they tend to be around $10 each and I would probably need around12-18 ... kinda painful on the pocketbook. Thanks in advance for any help!

Posted by homba 10 years ago


Long Range Locators Metal Detector

I'm Looking to build of long range locators for search gold. Please help me with an idea to pick which is a good kind of instructables match for device-search coil/ antenna, transceiver, frequency meter/ counter, vibration, light led, radar, and gps. I'm looking to forward hearing from  someone as soon as possible...!!!

Posted by Jasun 3 years ago


Long Range Locator Metal Detector

 I'm looking to build of long range locators for search of gold. Please help me with an idea to pick which is a good kind of instructables match for device-search coil/ antenna, transceiver, frequency meter/ counter, vibration, light led, radar, and gps. I'm looking to forward hearing from someone as soon as possible...!!!  

Posted by Jasun 3 years ago


Mouse IR detector Challenge

Anybody know how to determine which legs are which on the IR detector (double transistor) in old-school mice? One leg is common and the other two legs are emitters. Is there a test I can perform with a needle type VOM that could identify the leads? These three legged components are very common and can be used to build really simple and cheap data acquisition of rpm using the microphone jack and 5 volts from a USB port. One leg has extra metal and is likely the common. Still I would like to know if anyone has a test procedure. Thanks to all and keep repurposing everything in your path. It just feels good.

Posted by nickec 11 years ago


Any way to build low cost police band Ka radar transmitter? NOT Jammer.

We are trying to curb speeders in the neighborhood, and I thought it would be cool to have one of those radar detector "tester" type devices. Done a lot of research on this, but it seems it's hard to find a transmitter for the Ka band which would be the most beneficial to trick speeders into thinking they are being radar checked. I know jammers are illegal and frowned on in some places, so this I need just enough power to set off passing radar detectors. It can also use AC power or be fixed, since I'll just be using it around my house. Thanks!

Posted by Sylvester2009 6 years ago


Burned bulb detector / switch

Hello to all instructable community, I was trying to find a device that would detect when a bulb is burned and will switch to another lamp. The lamps I am using are 25Watts ac bulbs. I tried to Google a bit, probably didn't search the right keywords, but I couldn't find anything that does what I want. If you got any idea what i am talking about please reply. Thanks to all Omar

Posted by omarharoun 10 years ago


Help

I need some help translating this diagram to a small printed ciruit board I bought from radioshack. I've never done this before and wish to learn. I decided to build this lie detector for my science class science fair project and have all the necessary equipment, I just dont know like what row to put what and emitters, base, and all that good stuff. Please help. Thank you.

Posted by dwatord26 8 years ago


Motion Detector Trail Camera

Motion Detector Trail Camera motion, detector, detection, surveillance, security, trail, camera, webcam, webcamera, wildlife, IR, arduino, cheap, inexpensive, spy, cam Hello everyone. I'm planning on building a motion detector triggered "trail" camera, as inexpensively as possible.  I want to use a cheap IC (integrated circuit), if possible, not a $45 Arduino.  I've learned that the most expensive component of this project seems like it will in all likelihood be the digital camera module (the lens and CCD, which is a pixelated digital sensor for the brightness and color of light).  However, I have an old webcam from which I could salvage the camera module out of, if reasonably convenient.  And this is the primary thing I think I'll need help with. Beyond that, my plan is to get a cheap IC, plug the camera module into it on a breadboard, find (hopefully find and not have to delve into learning how to program this) some programming code for the IC to capture the image data and turn into some kind of conventional image file, and then capture the digital camera files on an SD card via SD card shield plugged into the IC via the breadboard.  After the initial project is finished, I'm thinking of taking it a step further by transferring the image files directly to a computer, and upload them immediately to the web but that will come later. And of course write some code to signal the camera to shoot when the motion detector detects motion.  And do some research about which kind of motion detector I want and get it.  But this part seems relatively pretty easy.  Oh, and also get some kind of battery; probably a Li-Ion cellphone type battery with a shield or 'holder' for it.  Haven't yet researched about the shield / 'holder' part for that, but seems like it should be easy. Questions: 1) What kind of programming would I need for the IC to capture the image data from camera and turn it into conventional image file?  Where would I get it?  ...or what?  I just want pictures, not video. 2) How do I salvage the 'camera module' from a web camera for this?  Or rather, perhaps I should ask, once I salvage it, how exactly do I plug it into the IC to send the image data to the IC...? 3) What is a cheap but effective IC for this? Anyways, thank you; cheers. Jack Oh, also wanted to note that I indeed have been looking through many tutorials about this stuff.  I guess I'm at that point where I feel like it would be worth it to write down where I'm at and ask for further directions.  Lol.  Thanks again.

Posted by jack207 4 years ago


Dirt Cheap Acoustic Guitar Pickup

Hi I am concerned about the health and safety aspects of the instructable of "Dirt Cheap Acoustic Guitar Pickup by Xuthal". The project encourages people to take apart a smoke detector to obtain a piezo sounder. However no warning at all is given by the author that there may be radioactive material in the device, or how to recognise it and how to deal with it. I tried to post a warning on the article but for some reason it hasn't worked. I could not see how to flag up the item so I am posting here. Whilst the manufacturers of smoke alarms play down the dangers of Americium 241 dioxide (the radioactive material), they would most certainly not condone opening up a smoke detector sensor. Am O2 will most likely pass straight through the gut due to its insolubility, so your readers are probably safe from ingesting it. However, if the source is fractured into dust particles, it could be inhaled and will lodge in the lung for a long time. Being an alpha emitter the Am241 will very likely end up causing a lung cancer. I think this instructable is highly irresponsible and should be removed. In any case the item taken from the smoke detector, a piezo transducer, is readily available from any hobby electronics supplier and costs less than the battery to power the detector in the first place!

Posted by TCSC47 3 years ago


Vintage Projects

I found this cool project website today that has everything from a Uranium detector to a bicycle powered boat. I'm brewing a storm of ideas after seeing these projects.Vintage Projects

Posted by robbtoberfest 9 years ago


Adruino cyclone dust sensor

I am looking for suggestions for building a wood chip / dust level detector for the collection can of a cyclone vacuum. I have tried using uv detectors, they get covered in fine dust and become in-effective.  I am thinking of using the ultrasonic sensor. My objective is to detect the level of chips and dust collected in the debris can, and sounding an alarm when the can gets to the full point. Any help on this subject would be appreciated.  I am new to working with these Adruino controllers and not real familiar with writing the Sketches for this. Thanks Don

Posted by Don D 10 months ago


Make a magnetic field detector ?

I dearly want to make a device to measure electromagnetic fields in the house ,since the presence of such has been more than obvious and at times annoying . My CRT monitors behave strange in my room . The geometry of one bends as i turn the monitor in one direction and at the same direction ,my spare one changes color to blueish like pale . Interestingly, they do it in the same direction no mater where i put them in the room . My turntable's (i am in to Hi-Fi gear ) cartridge reacts when i put it in some places in the room and i hear noise come out of the speakers until i reposition the turntable . Anyone have any ideas how i can locate the source ? Some simple device ,or schematic that will give me the ability to measure ,or at least detect to some degree the fields responsible ? Will be thankful for any answer .

Posted by soundsmyth 7 years ago


Stud Finder Circuit Diagram

I am looking for a circuit diagram for an electronic stud finder (the type of finder that measures the density of the wall rather than a metal detector).  Can anyone point me in the right direction? Christopher

Posted by willowtaylor 8 years ago


First project completed...now let's expand it!

My wife is interested in ghost hunting shows like TAPS and Ghost Hunters International. She even joined a local Paranomal Society. The first thing she wanted to buy was an EMF detector for a whopping $175. Now, I don't believe in ghosts, but I support my wife, so instead of buying her an OTS EMF detector, I decided to build her this one. Thanks Computergeek! Oddly, the first thing that popped into my head when I finished building the Arduino EMF detector was a quote from Keano Reeves from Point Break, "I caught my first tube today....Sir." It's appropriate though, in the sense that he was just getting started in the bank robbery investigations. I'm pretty happy with this build...I had a couple of issues in hardware and code that I was able to troubleshoot myself. And it all works! So this was pretty easy, even for a newbie. Now, what I want to do is add a data logger that records values to flash memory. You can probably see where I'm going with this (as a non-believer). If you remove the human element from the situation, is there still paranomal activity? Or put another way, if a tree falls down in the middle of the forest and no one is around to hear it...does it still make noise? If anyone has any ideas, tips, or suggesstions, I'd love to hear them. Thanks for a great online community! LorienD  

Posted by LorienD 7 years ago


uli lab stations

i have some vernier corperation uli lab iterfaces for sale with sensores and some documentation but no software i only have a few so there first come first serve. if anyone on here has access to the sofware or knows of some free software that will work it would be much apprishiated. im thinking about $30 US plus s&h; for the whole set sensors and all . this includes the interface and cables what documentation i have and the fallowing sensors. Heart rate, ultrasonic motion detector, magnetic field detector, mic/amplifier module, regular and fast response temp probes, and a force probe

Posted by juggalo_assassin183 8 years ago