what is this sensor?

I found a blink pov from here (layne and wayne) they are prframming the pov using Ambient light sensor ( physically looks like Led) what is this ambient light sensor?? is the same as IR leds ??? can i replace it with any other thing??? because the ambient light sensor is not available in the market

Question by agent555 


IR Sensor?

I have a pair of IR sensor, can you help me to find which one is transmitter and receiver. 

Question by ShuvamP   |  last reply


old sensor?

Rooted again dad leftover electronics and finding some relays and sensors that goes on the + - singnal.so I'm just wondering if you can connect it to an Arduino so when Arduinon may singnal'll send it out + through port 13? and if it goes so PLZ write a code

Question by Dannne11   |  last reply


Sensor Question Answered

This is a hypothetical electrical circuit question, I'll try to clarify as best as possible. If you had a circuit hooked up to a light bulb, but controlling a the light bulb were two sensors wired into the circuit. One sensor turned the bulb on when there was no light, and the other turned it off when there was light. I'm not sure if that would be all one sensor, but garden lights work somewhat like that. Anyway, what if the sensors were mounted directly in front of the light bulb, facing it, so they worked based on its light. What would happen when you turned it on? Would it act like a strobe light or just explode, and would the effect be different with LED's? Also, would you need to put some other mechanism in to slow the sensor's signals?

Question by Wasagi   |  last reply


Changing the sensor

Hello guys, I want to make this circuit I just don't want any light to be visible. So, I was wondering if I could just change this LDR sensor to a IR sensor and still get the desired results.  Thanks,

Topic by HavocRC   |  last reply


ROBOTICS and SENSORS

I would like to know how i can build a sensor...that detects moving objects.,which DO NOT make any CONTACT at all with the sensor......PLEASE HELP!!!!!!! and FAST!!

Topic by spaceboy_ram   |  last reply


IR sensor

Hi guys, Please help me to control my RC Car with eye IRIS movement (may be by using IR sensor). I  am waiting for your earliest  reply........... Regards,......

Question by Hudson samuel   |  last reply


sensor design

Any one please help!!!!! i am student of VIT university INDIA i am working on a project with ISRO (Indian space research organisation). we are inserting our payload which consists of 7 sensors. our sensors working temp is 273 kelvin but these sensors will be exposed to the outer atmosphere at an altitude of 80 km above earth surface where the temp is 197 kelvin [ our sensors will be placed inside,outer air will be sucked inside ]. at this temp our sensors wont work so we have to come up with a strategy which heats the incoming air in to the rocket to 273 kelvin, so please help us in designing the sensor so if you have any mechanism for heating the air please inform me. my email is     kapilkoundi@gmail.com

Topic by kapilkoundinya 


sensors and servos

I am working on a piece where I need to hook up 7 servo motors to the arduino (each rotating at a different speed, some in one direction, others in the other) but basically an on/off with a motion sensor. I am using a full rotation servo. I amusing an infrared sensor but the servo is still moving (awkwardly and jerky) when not sensing motion, but then runs as normal.Here is the code I am using (right now, I am only at 1 servo – trying to get the sensor right first) : #include Servo myservo;int potPin = 0; //analog pin used to connect the sensor int ledPin = 9; //select pin for the servoint val = 0; //variable to read the value from the analog pin void setup(){   myservo.attach(9); //set up the servo as usual pinMode(ledPin, OUTPUT); //variable to store the value coming from the sensor   Serial.begin(9600); //for watching the speeds in the serial monitor} void loop() { val = analogRead(potPin); // read the value from the sensor   val = map(val,0,600,0,255); if (val>80) digitalWrite(ledPin, HIGH); //turn the ledPin on    else if (val<80) digitalWrite(ledPin, LOW); //turn the LedPin off   Serial.println(val); delay(10); } – any suggestions?

Topic by wwischer 


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

Topic by 10player   |  last reply


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

Topic by Snowcoat   |  last reply


homemade water sensor

Instructable the site gave me a lot of information about homemade water sensor but as it is the first time i am making a sensor  to describe it very properly i am giving  the information of what i am trying to make there are two tanks supplyng water to homes the taps of the tanks are connected to a device which is used to switch on and of the taps at the same time, i want to make senor to measure the level of water in tanks as the tanks get filled in different time but are switched on in same time so i want to put the sensor in both the tanks and make a device which can close both of it at the different time, it can help in saving water  

Question by friends.deepesh   |  last reply


Cyclocomputer Sensor & Anemometer

Hy guys, good work here!!! I've an issue to build a sensor for the magnet of a computerbike.. How i have to proceed? I hope i have to connect a solenoid to the computer.. ?

Topic by Gargiuseppe   |  last reply


Light Sensor identification?

Hello all, I've just started a project and found a spare light sensor in a Megabrite LED Color Changing Night Light. However I am a complete novice and do not know how I use this specific light sensor. So here's the question: Are all light sensors the same? Can i just use any lightsensor 'ible or do I need specifics for this sensor? And if so, does anyone know how I can figure out what the light sensor is? Thanks for any help.

Question by Renagade   |  last reply


Barometric pressure sensor

I am working on my handmade radiosonde system and finding an altimeter that can be used in radiosonde(properly working in at least altitude of 80km) and compatible with arduino. Is there any altimeter that can meet my requirement?

Topic by LeeS182   |  last reply


hall effect sensor Answered

what kind of hall effect sensor would I need to make an electromagnetic suspension device? where from?

Question by sabre   |  last reply


Sensor to measure weight.

Hi everyone, I am stuck. I am trying to find a method or sensor to do what I want. Basically, I am trying to make a cheap flat weigh scale- light weight , flexible and portable (carried in a brief case or lap top case); thinner than using load cell sensors. I was hoping for a flat compression fabric , foam or piezo resistive pressure sensor, but have not found what I was looking for. It needs to be able to measure 50 to 250 lbs & fit on a counter. Does something like this even exist? Any suggestions would be most welcome. Thank you Appl314  

Question by appl314   |  last reply


Wireless temperature sensor

Hi I am looking to start playing around with some solar projects. I am looking for a wireless temp sensor or sendor that can work with my Mac or something with a base station that logs temps. Something accurate, versitile  not too expensive would be great Thanks

Topic by xkravx   |  last reply


Integrating a sensor to arduino?

I want to know to integrate a sensor to arduino. I mean how to start and from where to start. I dont want to use existing libraries, I want to create my own. I know the working of sensors and and some other basic stuff.  I want to read a sensor data (for ex: ADXL345), I want to look into the datasheet and implement it. Please someone help in starting

Question by naveenkumarmn7   |  last reply


IR distance sensor?

Hi, im looking for a way to detect distance (around 4 feets) using IR. basically a person will carry the IR transmitter and walk around until he comes across an IR receiver. the receiver is connected to a buzzer  where the buzzer will emit louder sound as the user getting near to the receiver.  can this be done by using ir transmitter and receiver led? any other better suggestion is welcome thank you for your reply 

Question by bhan1992   |  last reply


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 :)

Topic by mcamiea   |  last reply


attiny13v light sensor?

I need some help. i need to get a schematic & program for a attiny13v that will turn on a light when something passes over a light sensor, and then turn off if something passes over it again. has anyone done this before, or can it be done? just to let you know, i have done almost nothing with microcontrollers before. thanks for your help!

Question by matstermind   |  last reply


Arduino Gas Sensors

We are making an arduino-based gas detector that uses a combination of LED lights and a beeping piezo element to alert users to different levels of carbon monoxide in the air. We are having some difficulty in coding to have all the elements work together properly. What are some examples of arduino coding that can have a gas sensor chip, LEDs, and a piezo working together with a set of triggers, like the different concentrations of gas?

Topic by hthnc-student   |  last reply


Sensor Help with Arduino

Hi all! I need help with trying to figure out datasheets. I was digging through my electronics when I found and LM35 sensor. So I looked up the datasheet but I couldn't find out how to convert the analog output to a temperature. I found an i'ble on how to do it but I want to know how to find that information in the datasheet so that next time I get something I'll be able to do it myself. I looked at all the curves and none of them seemed to be temperature vs. voltage. I also looked through the whole first part and couldn't find the multiplier. Also does that multiplier change with the amount of voltage you supply the LM35 with? Say I use 5 volts. Will it give a different reading over 4.5 volts? There's so much technical and complicated data that I don't know what to look for. Here is the link to the datasheet http://www.ti.com/lit/ds/symlink/lm35.pdf Thanks!

Topic by HavocRC   |  last reply


Multiple Color Sensors?

Hello! I have the following TCS230 color sensor code, which works fine with my Arduino Mega. I want to connect more than one of these TCS230 color sensor to the Mega, but have no clue, what i should change in the code. Can someone help me? Thanks! Here is the code: #include #define S0     6 #define S1     5 #define S2     4 #define S3     3 #define OUT    2 int   g_count = 0;    // count the frequecy int   g_array[3];     // store the RGB value int   g_flag = 0;     // filter of RGB queue float g_SF[3];        // save the RGB Scale factor // Init TSC230 and setting Frequency. void TSC_Init() {   pinMode(S0, OUTPUT);   pinMode(S1, OUTPUT);   pinMode(S2, OUTPUT);   pinMode(S3, OUTPUT);   pinMode(OUT, INPUT);   digitalWrite(S0, LOW);  // OUTPUT FREQUENCY SCALING 2%   digitalWrite(S1, HIGH); } // Select the filter color void TSC_FilterColor(int Level01, int Level02) {   if(Level01 != 0)     Level01 = HIGH;   if(Level02 != 0)     Level02 = HIGH;   digitalWrite(S2, Level01);   digitalWrite(S3, Level02); } void TSC_Count() {   g_count ++ ; } void TSC_Callback() {   switch(g_flag)   {     case 0:          Serial.println("->WB Start");          TSC_WB(LOW, LOW);              //Filter without Red          break;     case 1:          Serial.print("->Frequency R=");          Serial.println(g_count);          g_array[0] = g_count;          TSC_WB(HIGH, HIGH);            //Filter without Green          break;     case 2:          Serial.print("->Frequency G=");          Serial.println(g_count);          g_array[1] = g_count;          TSC_WB(LOW, HIGH);             //Filter without Blue          break;     case 3:          Serial.print("->Frequency B=");          Serial.println(g_count);          Serial.println("->WB End");          g_array[2] = g_count;          TSC_WB(HIGH, LOW);             //Clear(no filter)            break;    default:          g_count = 0;          break;   } } void TSC_WB(int Level0, int Level1)      //White Balance {   g_count = 0;   g_flag ++;   TSC_FilterColor(Level0, Level1);   Timer1.setPeriod(100000);             // set 1s period } void setup() {   TSC_Init();   Serial.begin(9600);   Timer1.initialize();             // defaulte is 1s   Timer1.attachInterrupt(TSC_Callback);    attachInterrupt(0, TSC_Count, RISING);    delay(400);   for(int i=0; i<3; i++)     Serial.println(g_array[i]);   g_SF[0] = 255.0/ g_array[0];     //R Scale factor   g_SF[1] = 255.0/ g_array[1] ;    //G Scale factor   g_SF[2] = 255.0/ g_array[2] ;    //B Scale factor   Serial.println(g_SF[0]);   Serial.println(g_SF[1]);   Serial.println(g_SF[2]); } void loop() {    g_flag = 0;    for(int i=0; i<3; i++)     Serial.println(int(g_array[i] * g_SF[i]));    delay(400); }

Topic by roineust 


Sensor Contest Question -

Is a potentiometer considered a sensor?

Question by Texas_Mike   |  last reply


Hall sensor question

Hey all.I want to be able to measure the current draw through an AC wire in a confined space. I'm thinking hall sensors would be ideal for this due to small size and less chance of frying things (as opposed to a split-core transformer).Unfortunately all of the hall current sensor projects I've found here on instructables are for the pre-made ACS712 board. This is a no-go for me because of size, the need for cutting the wire to make the connection, and also cost is a factor too.Are there other options? I see a lot of three-wire sensors in through-hole transistor packages out there which would be ideal, but can you get the sensor voltage out of any of these, or is it strictly on/off?Any hints welcome.

Question by PS118   |  last reply


Using Ultrasonic Sensors?

I basically want to make a customisable reversing sensor in that I want to be able to use the sensors from a basic car system and be able to add and change the audio and visuals outputs and the distance at which they are triggered.

Question by kjhdfadn   |  last reply


Motion sensor bypass

My security light is equiped with a motion sensor, I would like to operate the fixture with a switch when needed and also by motion, how can I accomplish this

Question by CarlC89   |  last reply


Applications of color sensor

Hello everyoneI'm a student looking for an applications of color sensor either used in sorting,mixing or anythings. but this application should be have a benefit for life for the companies or community.

Question by ZiadA25 


PIR sensor help !!

I have a PIR sensor.. initially when i tested it using an led.. the led used to turn on when it detected motion.. now it happens vice-a-versa . Any suggestions to rectify the problem?

Question by imakethings   |  last reply


Distance sensor for Arduino?

I want to make a sort of self-educating machine as a programming project: there is an electromagnet and a magnetic thing and if the distance between  the magnets has increased between two measurements the Arduino lowers the current through the magnet, and if had fallen (the distance, not the object) it ircreases... In some time it should be able to reduce the aplitude of the object's oscillations. Is there a good and easy way to make a non-contact distance sensor? AND Is it possible at all????

Question by gruffalo child   |  last reply


Doornob touch sensor

I took apart a stud finder to see how it worked. Did a quick google search and figured out they work similar to tough sensitive lamps (capacitance). So after soldering an on off switch to replace the push button on it, I taped it to my door, and fine tuned the sensitivity wheel. Now when someone touches the doorknob (on either side of the door), It lights ups.

Topic by boggysandman   |  last reply


Line counting sensor?

I have a group (20) of small robots that need to all end on a certain line in a grid. My question is how can I get each car to count the number of lines it crosses and when it reaches the right number it stops. The problem is I have a budget of $75 dollars to make the guidance for every car. If there was maybe some sort of central controller that would work for each or maybe it is just cheep enough to make a simple set-up for each one. Any comments or questions would be much appreciated. Thanks in advance, Zootsuitman

Question by zootsuitman   |  last reply


Grid follower robot(analog sensors and digital sensors)?

OK first of all I am under time constraint (just 4 days to make a grid follower) Ok I have built a line follower before (two ir sensors and arduino), So now the problem is ,we have two sensors which we have made using ir emmiters and sensors (which work as analog ,ie no relay) We have now purchased two IR modules which has got a relay giving it a digital output. So I am asking how we should place these sensors to get the least wobling and correct 90deg turns

Question by cthaliyath   |  last reply


How to make a motion or weight sensor?

So i am trying to make a sensor to sense if they're is a certain amount of weight in a car seat, or motions. But i do not know how, i am also trying to hook it up to an app so in case the sensors pick up anything there is a notification or if the weight sensor exeds a certain weight limit. Does anyone know how to go about this?

Question by edcrobot   |  last reply


stress..sharp sensor!!GP2D15

I'm using sharp sensor as mentioned to detect presence of object in order to stop the conveyer. before this i'm using  GP2Y0A21YK and because of the phsyical appearance alikeness, i thought the basic operation is same.but i just discover that the new one is based on digital output. i try to modified my circuit. but seems nothing change happend. i dont know what really going on.. is there anyone that familiar with this sensor. my presentation day is about 2 weeks and i am even doesnt start to integrate the whole system yet...please..tq in advance http://www.totalrobots.com/media/pdf/gp2y0a21yk.pdf http://www.totalrobots.com/media/pdf/gp2d12_15.pdf  

Question by teemsaranghae   |  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


help me to identify sensor written 5D2A 3242 ?

This is the sensor on a auto coner spinning machine drum shaft 12vdc.

Question by zohaib443   |  last reply


can i even make that motion sensor even if im in the philippines?

Can i even make that motion sensor even if im in the philippines?

Question by shinra87   |  last reply


Need someone to set up a system that measuring the time of wearing a brace using a sensor and pay for this

I would like someone to construct or set up a system  that measures the time that someone is wearing a brace. Usually they use temperature or  resistance sensor using a data logger. Please if someone can build this I could pay him.thank you

Topic by orthofoo   |  last reply


Need advice on best sensory only pick up human movement?

Hi Can anyone please point me in the right direction as to where can find a specific sensor as follows : The sensor must cut the power to a multi plug 220v when someone comes within 2cm of where the sensor is placed. Only human interface is needed, anything other than human interface with the sensor must have no affect. Secondly, I need to have a 12v solenoid activate immediately when the power is cut to the multi plug. Is there anything out there that is reasonably inexpensive  that possibly performs both tasks and where can i find something like that, alternatively if someone has plans for a diy solution, that would be awesome. Thanks in advance for any help :)

Question by mariskaddt   |  last reply


how to make a tripwire thats not a tripwire? Answered

Hello everyone its been a long time since i have asked a question here but with curiosity staring me in the face i have no choice... so as the question title states im trying to make a tripwire thats not a tripwire and what i mean by that is im trying to make a type of sensor that you pull the string from it (which when you let go it will retract) and as soon as you pull the string the sensor turns on and knows how far the string is out...  im hoping to make this part of bigger project and this is definitely a big part of the project but i dont generally make things myself even though i want to... im hoping to get a small program that will just register the sensor since it will be connected to the computer and program while its on ill need to program many of them for different things but the main issue is just telling it what to do when a certain amount of the string is out or put back in from retracting... you know? it needs to be precise aswell... as in "sensor 1 pulled 1 inch out" (brain then moves piece 1) "sensor 2 pulled 8 inches and sensor one retracted 1 inch"  (brain moves piece 2 a few inches and piece one back 1 inch) do you see what i mean? it needs to be precise and all the sensors need to work together in one big network... there will be probably... 100 or more sensors working with there strings in a huge layout and i just when it comes to the sensor i dont know where to start or how to do this do i use Arduino some other parts and thinner paracord? you know so if anyone could help me out with this or what they would do that would be awesome

Question by ShinigamiTentetsutou   |  last reply


how way profit count coin joined by LCD display and notification through audio system using arduino?

Ok, Im have a little project about coin counter joined by LCD display and notify through audio system using arduino. Im using LDR sensor because it just a cheap project. Im not using a coin acceptor sensor as it difficult to be acquired. Is that any kind of program that is applicable to calculate coin instantly display coin total through LCD and can notify through audio system? or suggestion to use any other sensor? I hope anybody can help me.. thanks ^_^

Question by MohdFirdaus   |  last reply



DS3231

Arduino: 1.8.4 (Windows 10), Πλακέτα:"Arduino/Genuino Uno" Hello everybody I use Arduino R3 Uno with DS3231 and 1.8 TFT spi 128X160 and this is my first project. #include     #include #include #include #include // Init the DS3231 using the hardware interface DS3231  rtc(SDA, SCL); #define TFT_CS     10 #define TFT_RST    9  #define TFT_DC     8 #define TFT_SCLK 13   #define TFT_MOSI 11   Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS,  TFT_DC, TFT_RST); void setup(void) {   // Setup Serial connection   Serial.begin(115200);     // Initialize the rtc object   rtc.begin();   // You will need to do this in every sketch   tft.initR(INITR_BLACKTAB); // Blank Screen   tft.fillScreen(ST7735_BLACK); // Set background BLACK     // Start writing colored text tft.setTextColor(ST7735_RED);   tft.setTextSize(1);   tft.setCursor(5,10);   delay(1000);  // pause for dramatic effect   tft.print("1.8 TFT with DS3231"); } void loop() {   // Blank Screen   tft.initR(INITR_BLACKTAB);     // Send Day of Week   tft.setTextColor(ST7735_WHITE);   tft.setTextSize(2);   tft.setCursor(10,30);   tft.print(rtc.getDOWStr());     // Send date    tft.setTextColor(ST7735_WHITE);   tft.setTextSize(1);   tft.setCursor(10,50);   tft.print(rtc.getDateStr()); // Send time   tft.setTextColor(ST7735_WHITE);   tft.setTextSize(1);   tft.setCursor(10,70);   tft.println(rtc.getTimeStr());   // Send current temperature   tft.setTextColor(ST7735_YELLOW);   tft.setTextSize(1);   tft.setCursor(30,90);   tft.print("Temperature: ");     tft.setTextColor(ST7735_BLUE);   tft.setTextSize(2);   tft.setCursor(35,120);     tft.print(rtc.getTemp());   tft.println(" C"); } Clicking for compilation illuminates the line 8 DS3231  rtc(SDA, SCL); Software: arduino-1.8.4 windows 10 Libraries: DS3231 1.0.2 Libraries are up-to-date and when I ask to add again library DS3231 adds #include Please help. Where is the error? D:\Τα Ξ­Ξ³Ξ³Ο?αφά ΞΌΞΏΟ…\Arduino\@-NEW_Projects_OCT_2017\1.8TFT_with_DS3231\1.8TFT_with_DS3231.ino:8:21: note: candidates are: In file included from D:\Τα Ξ­Ξ³Ξ³Ο?αφά ΞΌΞΏΟ…\Arduino\@-NEW_Projects_OCT_2017\1.8TFT_with_DS3231\1.8TFT_with_DS3231.ino:4:0: D:\Τα έγγραφά μου\Arduino\libraries\DS3231/DS3231.h:64:3: note: DS3231::DS3231()    DS3231();    ^ D:\Τα έγγραφά μου\Arduino\libraries\DS3231/DS3231.h:64:3: note:   candidate expects 0 arguments, 2 provided D:\Τα έγγραφά μου\Arduino\libraries\DS3231/DS3231.h:60:7: note: constexpr DS3231::DS3231(const DS3231&) class DS3231 {        ^ D:\Τα έγγραφά μου\Arduino\libraries\DS3231/DS3231.h:60:7: note:   candidate expects 1 argument, 2 provided D:\Τα έγγραφά μου\Arduino\libraries\DS3231/DS3231.h:60:7: note: constexpr DS3231::DS3231(DS3231&&) D:\Τα έγγραφά μου\Arduino\libraries\DS3231/DS3231.h:60:7: note:   candidate expects 1 argument, 2 provided D:\Τα Ξ­Ξ³Ξ³Ο?αφά ΞΌΞΏΟ…\Arduino\@-NEW_Projects_OCT_2017\1.8TFT_with_DS3231\1.8TFT_with_DS3231.ino: In function 'void setup()': 1.8TFT_with_DS3231:24: error: 'class DS3231' has no member named 'begin' D:\Τα Ξ­Ξ³Ξ³Ο?αφά ΞΌΞΏΟ…\Arduino\@-NEW_Projects_OCT_2017\1.8TFT_with_DS3231\1.8TFT_with_DS3231.ino: In function 'void loop()': 1.8TFT_with_DS3231:47: error: 'class DS3231' has no member named 'getDOWStr' 1.8TFT_with_DS3231:53: error: 'class DS3231' has no member named 'getDateStr' 1.8TFT_with_DS3231:59: error: 'class DS3231' has no member named 'getTimeStr' 1.8TFT_with_DS3231:71: error: 'class DS3231' has no member named 'getTemp' Χρησιμοποιώντας την βιβλιοθήκη Adafruit-GFX-Library-master στην έκδοση 1.2.2 στον φάκελο: D:\Τα έγγραφά μου\Arduino\libraries\Adafruit-GFX-Library-master Χρησιμοποιώντας την βιβλιοθήκη Adafruit_ST3775 στον φάκελο: D:\Τα έγγραφά μου\Arduino\libraries\Adafruit_ST3775 (legacy) Χρησιμοποιώντας την βιβλιοθήκη SPI στην έκδοση 1.0 στον φάκελο: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI Χρησιμοποιώντας την βιβλιοθήκη DS3231 στην έκδοση 1.0.2 στον φάκελο: D:\Τα έγγραφά μου\Arduino\libraries\DS3231 Χρησιμοποιώντας την βιβλιοθήκη Wire στην έκδοση 1.0 στον φάκελο: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire exit status 1 no matching function for call to 'DS3231::DS3231(const uint8_t&, const uint8_t&)'

Topic by BillyK11 



Most efficient CO2 sensor?

I found this CO2 sensor. http://www.robotshop.com/parallax-co2-gas-sensor-module-2.html Any one know of a better one?

Topic by hthnc-student   |  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


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