Ram not detected?

Ok, i recently removed some ram to check what kind it was. Then i put it back and turned pc on. It said memory was changed. I put the memoyr in right... I dont know what to do. I have a dell dimension 2400 with 4 sticks of DDR2 ram. Each being 512 MB.

Question by sci4me   |  last reply


"Malware Detected"

Hi, today I got an error message in chrome whenever I load an instructables page; "Google has found malicious software may be installed onto your computer if you proceed. If you've visited this site in the past or you trust this site, it's possible that it has just recently been compromised by a hacker. You should not proceed, and perhaps try again tomorrow or go somewhere else. We have already notified www.instructables.com that we found malware on the site. For more about the problems found on www.instructables.com, visit the Google Safe Browsing diagnostic page." on the diagnostic page, it says; "What is the current listing status for www.instructables.com? Site is listed as suspicious - visiting this web site may harm your computer. What happened when Google visited this site? Of the 18 pages we tested on the site over the past 90 days, 0 page(s) resulted in malicious software being downloaded and installed without user consent. The last time Google visited this site was on 2012-06-16, and suspicious content was never found on this site within the past 90 days. This site was hosted on 8 network(s) including AS4436 (AS), AS22300 (WIKIA), AS3257 (TISCALI). Has this site acted as an intermediary resulting in further distribution of malware? Over the past 90 days, www.instructables.com/files/orig did not appear to function as an intermediary for the infection of any sites. Has this site hosted malware? No, this site has not hosted malicious software over the past 90 days. How did this happen? In some cases, third parties can add malicious code to legitimate sites, which would cause us to show the warning message." It goes on to suggest using the Google Webmaster tools to request a review. It seems odd that it's always been fine before, then for no apparent reason shows this?

Topic by Frank Strudel   |  last reply


I basically need a person detector. Sort of...

Some friends and I have been playing laser tag a lot recently, We try to team up in Free For All but always end up shooting each other due to darkness. I was wondering, is there any way (Cheap) To build something that each person can have, one person has a device that sends a signal to the other person when about 20 feet away, and on the other persons device, it would vibrate or buzz or something to indicate that the other person is coming. So basically when one person is 20 feet away, all other devices vibrate. One sender, and the rest receivers. And they would have to be pocket sized. Is there any way of doing this? My original plan was to use ElectroMagnetic Fields, one person has the detector, and the other, an EM Pump, But I could not find a pump design powerful enough for 20 foot range. Please Help! Thanks.

Question by Tuckoguy   |  last reply


remote detection persons?

Hello everybody, I live in a very remote area and am looking for a radio guided detection to see/hear when somebody enters my property. Distance from one place to the other minimum 700 meters. I have power but no telephone connecion, nor internet or mobile sources. A simple PIR detector that indicates that somebody (burglars, robbers) enters my private territory. will do; I am desperate after three burglaries. I look forward to any suggestions.  Thank you! Chaource

Question by chaource   |  last reply


arduino uno detection

Hello evry one i've got a weird issue :( i have an arduino uno R3 and it was working fine. now my computer doesn't detect it (i can't find even the com port or non identified devices in the device manager) that was when i was trying a GSM shieled with 9V 2Amp power like the datasheet says the weird thing that when i plug my arduino to the USB 3.0, the light "ON" on the board turn on, but when i plug it to USB 2.0, nothing happen. what i did: i remove evry other connection from the arduino i tried with another cable i tried other devises on my USB 2 and 3, they works fine i tried to use my arduino on another computer, same problem (i dont have another arduino to know what's making this problem) i tried to reset (with button and with jumper) -> the led L does not blink what i think the problem is: probably the problem is in the arduino not the computer maybe when i plugged the power 9V 2Amp and plug to the computer in the same time (and i dnt think it can be a problem) maybe there is a problem with the bootloader please help me, at least how can i know what it the problem, did i harm something or evrything

Question by HassenA1   |  last reply


Motion detection sprinkler

So my neighbours cat uses my garden - my vegetable patches to be exact - as a toilet. I know there are many many people out there just like me who are sick of it. I happen to like cats, used to have one myself, but i dont like them crapping in my garden. I've tried everything. Nothing works. But they dont like water and having soaked the cat at 4am with the hose a month ago i got a few weeks of bliss being left alone, until just last night when it decided to try again. I can't wait up for it all the time. So I want to make a motion detection sprinkler. Cheap as I can. I could buy one ready made like the Contech ScareCrow but it's £50. I figure it can't be that hard, I have several hozelock sprinklers in the garage that I dont use. If I could buy a cheap infrared motion detector and some kind of actuator? Maybe I could rig it up to the hose and sprinkler, but not sure exactly how to do this. Hoping someone here can suggest how to proceed?

Topic by jlangton2   |  last reply


Cheep Aircraft Collision Detection system?

A laptop using an auto detect adhoc WiFi network & ping to measure distance.

Question by FrankenPaper   |  last reply


Wanted: Help building and programming a detection system

I want to be able to know when my daugher and son enter the house, omit one on request and setup different identifications for each. I would like this to be an independent device (built for this exact purpose) no app for PC/Phone.  

Topic by Sovrac 


Way Of Detecting Humans?

Is there ~~an easy way~~ a best way of detecting humans in the dark, or in a forest? Me and my friends play airsoft, usually in a forest, and it's hard to know where the enemy (other friends) are. I'm a sniper and I want an easy way to detect them. One way would be a thermo-camera, but those are expensive. Is there a better way?

Topic by guyfrom7up   |  last reply


Detect a touch to the threads

Hello. I have a lot of threads stretched vertically. I want to detect the touch them. So that you can then play them like a guitar for example). What is the easiest way to do it (detect touch, not to make a guitar)? What kind of sensors could you recommend for that?

Topic by oleinv   |  last reply


does anybody know how i can make a system that can detect humans in a dense area?

I need to make a machine of some sort that will detect humans in say woodland or a city. it needs to be able to find were they are and how far away(roughly). ive already established that IR, microwaves, coherant ultrawideband noise, and cameras wont work. ive heard there are machines that can detect human heartbeats and breath. can anybody help me in detail?

Question by MANIAC   |  last reply


detect earth movement

I live very close to very busy highway.any way to build cheap seismograph to see & record my house shaking when overloaded semi goes by ?? (nothing against drivers )

Topic by swoogydew   |  last reply



Automatic baby cry detection

A friend of mine asked me today if I could help him construct an automatic crib for his newborn child. He wants to make a crib that automatically starts moving from side to side when crying sounds are detected. How do I make something to detect crying?! Where do I even start on this one.. ? :)

Topic by chr   |  last reply


What kind of motion sensor?

Http://www.powerdecal.com/Page/13/ProductInfo Most motion sensors detect external movements to trigger. It seems the one on this device triggers when the car moves rather than when it detects movement from outside objects. I don't think it's a gps module. Any thoughts?

Question by zosim   |  last reply


Electronics

I want to cover a stairway.  The motion detection camera that is in the library here is a very good start.   I want to add the following functions. 1. long battery life 30 days min. 2.. Rotating photo storage.  i.e. when the memory is filled up, the camera will overwrite the oldest photo. 3.  Date and time stamp A unit like this could be left in place for a long period and only accessed if something has happened that need to be checked.   

Topic by jscanlan   |  last reply


details of cable fault detection robot?

With circuit diagram and illustration

Question by rehnasalih   |  last reply


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.

Topic by brickzima   |  last reply


bluetooth detected cercuit needed!!! Answered

I really need a diagram for a circuit that would be detected by bluetooth device if possible ofcourse if not it would be very help full to share another device that would serve the same , i mean as a small simple device that would be detected by bluetooth .

Question by AbdouC   |  last reply


IR source detection on a screen?

Hello everyone, I'm trying to find a way to detect a IR source -a LED- from 100m. I only need to detect the source, I do not need to transmit data.  When I turn the camera towards a IR source the software would put an icon on the source BUT without seeing the beam. Namely, the led should look like it is off but the icon on the image should indicate that it is a IR source when it is on. Thank you all!

Question by Matienzo   |  last reply


RFID or Bluetooth detecting range?

I have a project in which I need a stationary device (A) to pair with/detect a mobile device (B) and only that device. Once detected/paired, I need device B to light up when pulled out of range from device A. I also need to be able to adjust this range in some manner. I was looking at RFID, but I am worried about interferance from other RFID tags. Not sure if bluetooth could even do what I want in the size that I need (no more than 2x2x.25 inches for either device.) ANyone have any suggestions?

Question by Etrogann   |  last reply


X-CTU not detecting xBEE?

I am trying to communicate between two xBEEs. one xBee is connected via the xBee explorer shield to COM9 in to my laptop and the other is conncected to the arduino uno via the xBee shield ( www.coolcomponents.co.uk/xbee-shield.html?gclid=CPf98dunz7wCFeXKtAodoHEA_g#. ) to COM 17. I am using xBEE Series 2. Now the xCTU detects the xBee connected via the explorer; however it doesnt not detect the one connected via the shield to arduino. It just says Arduino Uni (COM17) in xCTU. and whn I try to rest it it says 'Unable to open com port'. I have moved both the jumpers on the other pins on he USB side, but still no luck. I have tried all the combinations but it doesnt work. Can someone help me with this problem please? :(

Question by Bam Boy   |  last reply


Instructables.com Detected as a Malware Distributor

Ok, seems like others are having similar issues - when I open instructables.com in Google Chrome, it blocks the access and tells me it's unsafe. I know instructables.com is perfectly safe, so I'd like to notify you so that your reputation does not get smudged. Screenshot attached. Hope you can resolve this soon.

Topic by colorex   |  last reply


different liquid detection sensor

I am building a biodiesel production system. at different points in the process, a tank will have different liquids in it (sometimes more than 1 type, separated out). for instance, there is a point where glycerol sinks to the bottom, while biodiesel floats on top. what i want to do is drain the glycerol from the bottom of the tank (via electronically controlled solenoid valve), then when a sensor detects a change in material (biodiesel), shuts off that valve and opens another (final product tank). for the life of me, i cannot find a sensor that will do this for less than $100. preferably, i'd like to spend less than $30. i can work with a resistive type or voltage type sensor. i just need to be able to make that distinction of material change... any ideas? THANKS!!!

Topic by samurai1200   |  last reply


Can the arduino detect frequencies?

I want to make a spectrum analyser and I want to use a micro controller, but I don't know how. I want to know if the arduino (any one) can split up the different frequencies and output them, so I can use it as an input to an LED driver (LM3915). This will allow the LEDs to be at full brightness and respond to the output of the arduino, if the frequency filter is possible. If not, I will use a series of bandpass filters instead. I want to make an 8 band spectrum analyser. I just thought that using an arduino would be cheaper. Thanks. The schematic I will be using: http://stavebnice.postreh.com/picture/PT041_schem_v.gif

Question by knektek   |  last reply


Pan Tilt Face Detection

HI I'M GETTING THESE ERRORS IN VC++ 2010, HOW DO I RESOLVE THIS? 1>facedetect.obj : error LNK2019: unresolved external symbol "public: void __thiscall Tserial::disconnect(void)" (?disconnect@Tserial@@QAEXXZ) referenced in function _main 1>facedetect.obj : error LNK2019: unresolved external symbol "public: int __thiscall Tserial::connect(char *,int,enum serial_parity)" (?connect@Tserial@@QAEHPADHW4serial_parity@@@Z) referenced in function _main 1>facedetect.obj : error LNK2019: unresolved external symbol "public: __thiscall Tserial::Tserial(void)" (??0Tserial@@QAE@XZ) referenced in function _main 1>facedetect.obj : error LNK2019: unresolved external symbol "public: __thiscall Tserial::~Tserial(void)" (??1Tserial@@QAE@XZ) referenced in function "public: void * __thiscall Tserial::`scalar deleting destructor'(unsigned int)" (??_GTserial@@QAEPAXI@Z) 1>facedetect.obj : error LNK2019: unresolved external symbol "public: void __thiscall Tserial::sendChar(char)" (?sendChar@Tserial@@QAEXD@Z) referenced in function "void __cdecl detectAndDisplay(class cv::Mat)" (?detectAndDisplay@@YAXVMat@cv@@@Z) 1>c:\users\auvsi2014\documents\visual studio 2010\Projects\facedetect\Debug\facedetect.exe : fatal error LNK1120: 5 unresolved externals

Topic by dnarayanan93   |  last reply


Help with motion detection idea

I had an idea for a dramatic halloween set up where the porch light turns off as the person approaches the door and turns back on again when they leave.  First off I don't even know if this is possible. I assume I would need a PIR motion detector and arduino to make this work. I have had some experience with very basic electronics but never anything like arduino so I wouldn't know how to begin programming something like this. I'm guessing I wouldn't be able to use the actual porch light so I plan to set up another light bulb. I would love any advice as I want to make this idea happen but I simply don't know how to approach it. Thank you!

Topic by CrazyClever   |  last reply


Detect Down, using arduino?

The desired result is a pretty simple one in this case.  I am curious how you can tell where "down" is, using electronics.  I'm sure It could be done by initializing gyroscopes in an initial, level position, but my friend has as small quad copter, that can take off at an angle, and be turned on at an angle, and still level itself perfectly. It doesn't have to have an initial reference to find what down is.  The other option is to use accelerators, but if you are making a device to control a rocket or multirotor it is unlikely to impossible that you will be able to isolate the 9.8 m/s^2 due to gravity from the linear and vertical accelerations,  I assume your everyday gyroscope outputs data in the form of change in degrees, so if it just sitting perfectly still it would just output 0 on all axis, but if it actually gives the current angle I would be surprised, and curious how this is done.  So in conclusion, how could an arduino accurately know where down is?

Question by seedorfj   |  last reply


RFID/NFC computer lock?

I am curious if any of you have an idea for something that could detect a bracelet from 5-10 feet and when it leaves, issue a sleep command to a computer.  I think it would be relatively easy to issue the command from an arduino, but I'm not very sure on which tags and readers to use for the right range.  The idea would be for the computer to automatically sleep/lock when you leave the room.  So what frequencies/types of tags and readers should I look into that will offer a decent range, that is close enough not to loose connection reaching across the desk or walking a few feet across the room, but won't work from a few rooms down the hall, and will interface well with an arduino.

Question by seedorfj   |  last reply


Sorry for the shameless plug....

but I have so little time to work on my projects that it can take up to a year to get out something as simply constructed as the following.  It has to do with my main hobby being electronics, and the hardware end of things is a bit rusty, so it takes me longer, and I really have my life filled to the brim (for the moment anyways) so the darned need to stay alive gets in the way too. ANYWAYS, for those interested,  I have finalized my polarized light skin cancer "revealer":  take note, I warn this is not a medical grade device, and LOTS of training needs to be done before one can diagnose with such a thing, but it may help someone see an anomalous mole before it becomes cancer, and so if it does that for one person, I feel it was worthwhile spending 6 + months on it. The IBLE can be found here...for any that are interested.

Topic by Goodhart   |  last reply


Motion detecting recordable sound device

I would like to incorporate a motion detecting recordable sound device in my sculptures - does anyone have any idea how to or where to get such a thing??? thanks Jimmy

Topic by jimmygg   |  last reply


Detecting digital screens (PC and Mobile)

Hi everyone, I have a project which is based on detecting the screen of PC or Mobile. Are there any common properties in digital screens? what is the best sensor or the best way to detect digital screens? I'm doing image processing, but I want to add quality by using sensors.  Thanks in advance

Topic by RashadS5   |  last reply


How to detect the TinyGPS_Tracker to upload the software

Dear all,I are configuring new TinyGPS_Tracker, all hardware is ensambled and, at this moment, i want to upload the compiled program but the PC don't detect the "hardware", any idea? I need install any other driver to see the device?Thanks,

Topic by waver_   |  last reply


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

Topic by NickF73   |  last reply


Motion Detecting script CHDK help?

Hi guys, I recently installed CHDK on my Canon Ixus 125 HS/Powershot Elph 110 HS (the firmware is 1.01A) so I could have a fast shutter speed.  Upon on testing it out (I used the original script that they give you) I found that it takes an image after the motion has taken place, so I'd like to know how you can make it take an image as soon as it detects motion. Besides this, I don't understand the function of the two settings to change the script they give you. I would be grateful if someone could help me on how to use it. I'd like a way to do it without any programming on a computer or something, a way to do it on the camera itself please. Thx in advance super_me

Question by NebulaIX 


Is there such a thing as Motion-detecting Dimmer Switches?

HEllo. I am wondering about either dc or ac auto dimmer switches. What I would like to do is make a series of auto on and auto off dimming blacklights for a gallery. I haven't found much of anything online. I wondered if there is a diy workaround possible?

Question by sreudianflip   |  last reply


Secret Knock Detecting Coding Confuse

Can somebody explain to me about line:int secretKnock [maximumKnocks] = {50,25,25,50,100,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,}this is the initial setup:Shave and a Hair Cut..Is it mean that I can only knock using this type of knock?Then how do I record new knock...Else,is it really matter if I use any type of program button? I mean NO, NC?It because my reset button went crazy each time I try to record other knock, it only listen to Shave and a Haircut knock...all the master please help me...?

Question by ElectroThinker 


Sound wave heart beat detection

I love to graph things. Everything from outside temperature to server room temperature to the number of users on the network to my weight.I just read an article in Make magazine about DIY ECGs, and it got me thinking.. i want to graph more things about my body :)Would a microphone embedded in the bed be able to pick up the heart beats and calculate the BPM? This way I could graph development in resting heart rate over time. The microphone would pick up lots of noise from the person moving around etc.. but that doesn't mather. It only needs to get a few clean heart beats in order to calculate the bpm, right?What hardware and software would be suitable to create something like this?Any ideas?Yeah, of course there are other more traditional ways of measuring heart beat.. but I'm to lazy to do that.. I'd rather spend some time making a fully automagickal system.

Topic by chr   |  last reply


A BALONY detection kit....I have never seen this before.

I thought this was REALLY useful. Check it out and lt me know what you all think: Some thing real to grasp hold of, from the Richard Dawkins Foundation for Reason and Science.

Topic by Goodhart   |  last reply


Can I mix a Luminol solution for detection of biological materials with a dilution of drug store hydrogen peroxide?

Here's my situation: I've obtained some powdered Luminol, and would like to experiment with it a-la-CSI. I know Potassium Ferricyanide is the suspension of choice, but I've also read that 4% Hydrogen Peroxide works. If I were to achieve the 4% with First-Aid grade peroxide and distilled water, would that work?  And is a Hydroxide Salt necessary to the chemiluminescent effect of the detection of biological materials? Is it just a simple "add powder to liquid" mix, or are there more steps? Also, would anybody know where to get - or how to make - Potassium Ferricyanide safely and inexpensively? Thanks, Tomtomtom55

Question by tomtomtom55   |  last reply


Arduino intruder alarm modification

We have a professionally installed burglar alarm system that dials out (over a dedicated landline) to a monitoring station when an intrusion is detected.  I'd like to modify it to send us an SMS (via the mobile phone network) and/or email (via wi-fi on a different landline) as well, just in case the phone line is cut, and to make sure we get notified immediately - the monitoring station tries to call on the landline first, then it calls our keyholders and the police, which all takes time.  If I'm 5 minutes away and the alarm is triggered, I'd like to know straight away so I can rush home. The alarm company have quoted a huge sum to make this change, because an updated control control panel would be needed to deal with the texting/emailing.  I can't go cutting into their system or it will invalidate the maintenance contract, so I need to pick up when the alarm is triggered without any physical connection.  Short of remotely detecting a current in the cable to the siren (a 12V DC signal, so how would I detect that?) it occurs to me that using Arduino to listen for the siren might be the best bet.  But I'm an Arduino beginner and I have no idea whether it would be better/easier to detect a noise over a certain threshold - the siren is very loud, but the noise from the adjacent road can be pretty loud too - or to try and detect the particular sound frequency of the siren.  All suggestions gratefully received. 

Topic by Yorkshire Lass   |  last reply


Getting the Arduino to Convert analog signal from guitar into correct frequency

Hello Everyone, I was wondering if anyone can help me with a simple solution to my problem, I was to be able to get the sounds from my guitar into my ardunio and have the correct frequency be stored. I can get the guitar connected to the arduino and numbers come out of the serial monitor but they don't make sense, i need to have the correct frequency come up for each note i play, I have looked at a few solutions but being a beginner to this some go over my head or they just didn't work. Can anyone help me or point me in the right direction to be able to do this? Thanks  P

Topic by paddykoolster   |  last reply


how to setup intrusion detection system with avast firewall?

How to setup intrusion detection system with avast firewall?

Question by Blakat88   |  last reply


How detect the speed changes of fan using a controller ic?

I have a ceiling fan manual regulator, the voltage output that i got when different speed is 80v,120v,180v,200v respectively in my project i want to detect the fan speed changes. that means if fan is running in 1st speed then user turn into second speed it should be detect(by using in Arduino) .how can detect this?I tried to use a current sensor(ACS712) at output of a regulator then detect the current for different speed..but the variation still small cannot be detectable.

Topic by wounder   |  last reply


how do you detect whether a computer is on a lan network in a computer lab ?

And is it possible to detect pendrive insertion on main computer when on lan ?

Question by ruchishah   |  last reply


how to make a cheap remote and key detecter ?

I am trying to make first cheap and portable key and remote finder . please give me some suggestion .

Question by Er Varun Goyal   |  last reply


Is there any sensor that can detect human skin?

I am working on a project that  involves detection of skin. The sensor should be in such a way that it should differentiate human skin from other objects like wood,plastic,metal.

Question by krishnaramya   |  last reply


Is there any way for the Serial port to detect continuity?

Like if i have 3 switches how could i detect weather they are on of off? Keep it simple,thanks. Edit:its the 9 pin serial port

Question by ReCreate   |  last reply


How to detect a heart beat or rythum in a room?

I have heard about the government and companies doing this kind of thing.  Does anyone know how or have an  idea of how, to detect a heart beat in a room or even multiple heart beats? Thanks in advance.

Topic by moe1024   |  last reply


How to make a photo diode detect light? Answered

Can anyone help me to know how can a photo diode detect a light. What I mean is the light sensing circuit which will close the circuit when it detects light. Please help, I do not know anything about photo diodes. And one more thing, is there a circuit not using transistors for the light detecting circuit? And what difference would it make if it's forward or reversed biased? Here is the circuit I made. Please tell me if there is something wrong with it

Question by cc67   |  last reply