on pouring 350 milliliter. 20:45:25.971 -> 3fffff20: 00000000 00000000 00000000 00000000 When the liquid flows through the sensor, it makes contact with the fins of the turbine wheel, which is placed in the path of the flowing liquid. Thanks Damian. why not just control the pump speed to control flow thats what I do. This type of sensor can be found on different diameters, water pressure (MPa) and flow rate (L/m) ranges. You should be able to hook a servo or gear motor to that. lcd.setCursor(0, 1); There is one difficulty that I haven't been able to overcome. The first challenge is that I could'nt find an ultrasonic clamp-on flow sensor to use. Now, all we have to do is to measure the time for the pluses or to count the number of pulses in 1 second and then calculate the flow rates in liter per hour (L/Hr) and then use simple conversion formula to find the volume of the water which had passed through it. So the flow rate is frequency / 7.5. If you think the video tutorials are essential, please subscribe to our YouTube channel to give us motivation for making the videos.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[728,90],'arduinogetstarted_com-large-mobile-banner-2','ezslot_3',106,'0','0'])};if(typeof __ez_fad_cmd != 'undefined'){__ez_fad_cmd.push('div-gpt-ad-arduinogetstarted_com-large-mobile-banner-2-0');}else{ __ez_fad_cmd = ['div-gpt-ad-arduinogetstarted_com-large-mobile-banner-2-0'];}; Please note: These are affiliate links. According to the Hall effect, a voltage difference is induced in a conductor transverse to the electric current and the magnetic field perpendicular to it. 
Soft Drink Industries and Chemical industries have to constantly measure and quantify the liquids that they are handling during this automation process, and the most common sensor used to measure the flow of a liquid is a Flow Sensor. if (isinf(FREQUENCY2)) By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I try to combine this code with other sensors code. lcd.print(vol); I hope someone could help me out. Measure Water Flow in literes using Arduino Mega 2560 Board and Water Flow Sensor. I am currently using this device for my thesis and i needed to combine these two! https://arduino.stackexchange.com/questions/75761/arduino-project-interrupt-error, water or any liquid flows through the sensor and quantity of water gets recorded, now according to quantity of water flown there is price decided, this price needs to be deducted by swiping rfid card, i haven't been able to control interrupts. If not, does anyone know of embedded solutions using servos or steppers maybe? Serial.println(FREQUENCY2); lcd.print("Rate: "); More like San Francis-go (Ep. float TIME = 0; Make sure to select one that will cover your needs. Measurable and meaningful skill levels for developers, San Francisco? // Calculated litres/hour I don't know how to deal with this error. I have tried your code using the sensor. By using attachInterrupt command, whenever there is a rise in the signal at pin 2, the flow function is called. */ lcd.setCursor(0,0); 20:45:25.971 -> 3fffff10: 40202b15 000000fe 00000000 00000000 Why did it take over 100 years for Britain to begin seriously colonising America? Due to this, whenever water flows through the valve it generates pulses. water Billing System using RFID(Mfrc522) on Arduino NANO. AMF Series 18/24/36 W Medical AC-DC Adaptors, TPP 180 and TPI 180 Medical and Industrial AC/DC Power Supplies, NTS/NTU Series Reliable, Safe, and Durable DC-AC Pure Sine Wave Inverters, IsoMOV Series Hybrid Protection Component. Z = pulseIn(input2, LOW); Answer } flowSensor = (2 * pulseCount) / calibrationFactor; // number of pulses in half a second, so twice that for a minute divided by the calibration factor. while (oldTime < sampleTime) { // loop to sample the flow sensors values oldTime = millis(); // gets the current time during the sample loop currentFlowValue = digitalRead(flowSensorPin); // sampling flow sensor if (initialFlowValue != currentFlowValue){ // if flow sensor value has changed from say high to low or low to high. 20:45:26.020 -> 3fffff40: 00000000 00000001 00000002 40201f62 I will appreciate if anyone could help me by buying the sensor (no matter if it is expensive) and to build the code using arduino or any other microcontroler. currentTime = millis(); Output rise time: 0.04us Where did you get the Frequency = 1000000/Time. Hi void setup() X = pulseIn(input1, LOW); i need the flowrate to start counting minimum flow to detect approximately 2l / h, Sir please provide a flow chart and block diagram, hi, thanks for useful tutorials Any help would be massivly appricated! Hi { Hi,thanks for the video and program. The code in this tutorial may be confusing for some. Submitted by Fadi K on Tue, 04/20/2021 - 03:03. Could you help me? A common 1/4 turn ball valve will provide the fractional flow you seek. } Connect YFS201 Hall Effect Water Flow Sensor VCC pins to 5V Power supply & GND to GND. 
Try downloading the Codebender plugin and clicking on the "Run on Arduino" button to program your Arduino board with this sketch. I tried this with an alternate flow meter, could not get it to work. 2 years ago. lcd.setCursor(0, 0); 20:45:25.971 -> After finding flow rate which is in liters/minute, divide it by 60 to convert it into liter/sec. Here only A0 used. Hi, how did you calculate the 4.5 for the calibration factor? on Step 3. lcd.print(vol); The working of the YFS201 water flow sensor is simple to understand. Although you mentioned the sensor is an analog sensor in this tutorial, its been considered as digital sensor in IoT water flow sensor tutorial. int X; Seems to be some discrepancies between the flow meter spec vs your text. The hall-effect sensor outputs the corresponding pulse signal. This question does not appear to be about Arduino, within the scope defined in the help center. oldTime = millis(); // gets the current time before the sample loop initialFlowValue = digitalRead(flowSensorPin); // gets the initial posostion of the flow sensor sampleTime = oldTime + 500; // sets the sampling time as 0.5 second. on Introduction, How i connect digital display to aurdino and water flow senser, About: Arduino Tutorials by Codebender.cc Team. lcd.print(l_minute); In this way, we can count the number of frequencies produces by the water flow sensor per second. The water flow sensor is integrated with a magnetic hall effect sensor, which generates an electric pulse with every revolution. How can one check whether tax money is being effectively used by the government for improving a nation? i want to convert the measured amount of water into its equivalent cost. The water flows through the sensor, which in turn rotates the wheel inside the sensor. l_minute = l_minute/60; can you please help me with this.?? We are using the header file of the LCD, which eases our interfacing the LCD with Arduino, and the pins 12,11,5,4,3,9 are allotted for data transfer between LCD and Arduino. Cooling body suit inside another insulated suit, Is there a better way of defining a constraint on positive integer variables such that no two variables are the same and are uniquely assigned a value. instead of total flow we need to show H.W F/R and C.W F/R By counting the pulses from the output of the sensor, you can easily calculate the water flow rate. Howerver, please do not copy the content to share on other websites. Adaptation Courtesy: hobbytronics.co.uk I want to build this device, and I would like to be ensure that the count is not lost if the power is lost. I hope you liked this, let me know in the comments. lcd.print(Hw F/R :0.00 L/M); volatile int flow_frequency; // Measures flow sensor pulses lcd.clear(); Sensor Type: Hall effect In this condition, we can observe pulses, which are generated from the sensor. 468). 20:45:26.020 -> 3fffffb0: feefeffe feefeffe 3ffe85e0 40100d69 This code are not give the output for nodemcu .What is the reason ? Rfid for access controlling and keypad for selecting amount/volume of water that is to be drawn. pinMode(input1, INPUT); Hall effect is the production of the potential difference across an electric conductor when a magnetic field is applied in the direction perpendicular to that of the flow of current. float LS = 0; Here we used only A0 .But for this we need to A0 and A1,right? You might apply 12 V to actuate, but then you can reduce the voltage very low (maybe 2 V or lower) and the valve will still say actuated. 20:45:26.020 -> 3fffff50: 401004ad 00000001 3ffee54c 40201f74 { { the one configured here is Because I think this situation is not normal. Question float WATER = 0; Durability: minimum 300,000 cycles. Dear sir water flow rate project practically very nice and I was making. It may be simpler to do so. it shows as large as total vilumv of 23 liters.. Copyright 2022Circuit Digest.
total cost = total volume of water/unit cost of 1 litre water, Hi Alex, great work well done! How is making a down payment different from getting a smaller loan? lcd.clear(); float WATER2 = 0; It will need careful calibration if better than 10% precision is required. Now, can we make a closed loop system in which a pump would perform by PWM, driven by the Arduino to a calibrated flow rate and them check against itself with the flow meter? lcd.setCursor(0, 0); The flow rate pulse characteristics from the datasheet are given that frequency is 7.5 multiplied by flow rate. Pulses per Liter: 450 Im wondering what the reason is. Output fall time: 0.18us This value is added to the vol variable for every one second. } Can anyone help me to buildthe same project but this time by using an ultrasonic clamp-on flow sensor. And to display flow rate sensed by analog pin A1, add the line similar to that of A0. Serial.begin(9600); We are considering to make the video tutorials. Do you use a pump to circulate the water flow, if so maybe you have a better result with a variable pump speed (PWM), in state of a variable valve opening. No. on Step 2, Anybody can help me. For every interrupt signal, the count of the variable flow_frequency will be increased by 1. lcd.clear();
I did the same but it still not working though. The pressure can be created by liquid flow. What happened after the first video conference between Jason and Sarris? There will be no interrupt signal seen at the pin 2 of the Arduino, and the count of the flow_frequency will be zero. Undefined behavior (according to clang -fsanitize=integer) on libstdc++ std::random due to negative index on Mersenne Twister engine. The water flow sensor consists of a plastic valve body, a water rotor and a hall-effect sensor.
Closest equivalent to the Chinese jocular use of (occupational disease): job creates habits that manifest inappropriately outside work. The same thing happens in a solenoid valve: once you apply enough voltage to start motion, the motion will complete. Question Tip W = pulseIn(input1, HIGH); These are commercial type valves used to control water in heater systems and such. The below code repeatedly turns the water valve ON in five seconds and OFF in five seconds. It is the same for controlling gas flow. This sensor sits in line with your water line and contains a pinwheel sensor to measure how much liquid has moved through it. We appreciate it. These are not exotic, you will find many in all sorts of sizes. LiquidCrystal lcd(12, 11, 5, 4, 3, 9); The current time and cloopTime are used for the code to run in every 1 second. The shaft of the rotor is connected to a Hall effect sensor. I was stuggeling for quite a time to get my flow sensor working. { We took a lot of time and effort to create the content of this tutorial, please respect our work! lcd.begin(16, 2); 1 year ago. Working Humidity Range: 35%-80% RH I have a project to be made i.e. Which lead should I buy for my DC power supply? on Step 3. The project is to measure the liquid flow in a transparent 10mm tube and to detectany bubbles inside the passing liquid. The current time and cloopTIme variable ensure that for every one second the value of the flow_frequency is taken for calculation of flow rate and volume. lcd.print(" L"); int W; LS = WATER / 60; Did you make this project? /* And then connect LCD pins 4,6,11,12,13,14 to Arduino digital pins D7, D6, D5, D4, D3, D2. The solenoid will be all or nothing. If you buy the components through these links, We may get a commission at no extra cost to you. Click to enlarge image. The complete working can also be found in the video linked at the bottom of this page. I've been looking at water flow control with Arduino and I'm finding a huge difficulty in managing to do an 'analog' control on water flow. unsigned char flowsensor = 2; // Sensor Input The sensor that I have it has 20mm diameter, <1.75Mpa water pressure and ~30 L/m flow rate range. } Custom NanoLeaf Lights! The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry. lcd.print(L/M); Its design is in such a way that the hall effect sensor is sealed off from the water, and allows the sensor to stay safe and dry. Probably not what you're looking for. 1 year ago. In this flow meter, for every liter of liquid passing through it per minute, it outputs about 4.5 pulses. If you are new to Arduino and LCDs, you can consider reading this Interfacing Arduino and LCD Article. I can use a measured amount (I.E. The red wire is used for supply voltage which ranges from 5V to 18V and the black wire is connected to GND. // the loop function runs over and over again forever, Arduino - Button - Long Press Short Press, Arduino - Potentiometer Triggers Piezo Buzzer, Arduino - Potentiometer Triggers Servo Motor, Arduino - Servo Motor controlled by Potentiometer, Arduino - Ultrasonic Sensor - Piezo Buzzer, Arduino - Ultrasonic Sensor - Servo Motor, Arduino - Temperature Humidity Sensor - LCD, Arduino - Temperature Humidity Sensor - OLED Display, Arduino - Display Temperature from LM35 Sensor on OLED, Arduino - Display Temperature from LM35 Sensor on LCD, Arduino - Cooling System using DHT Sensor, Arduino - Cooling System using DS18B20 Temperature Sensor, Arduino - Button Controls Electromagnetic Lock, Arduino - Door Lock System using Password, Arduino - Controls 28BYJ-48 Stepper Motor using ULN2003 Driver, Arduino - Controls Stepper Motor using L298N Driver, Arduino - Log Data with Timestamp to SD Card, Arduino - Door Open - Send Email Notification, Arduino - Temperature - Send Email Notification, Example - 04.Single Blink Change Frequency, Example - 05.Multiple Blink Without Delay, LDR Darkness and Light Detector Sensor Electronic Circuit, Tutorial using serial LCD screen make Arduino speed curve recording, please give us motivation to make more tutorials. }
Soft Drink Industries and Chemical industries have to constantly measure and quantify the liquids that they are handling during this automation process, and the most common sensor used to measure the flow of a liquid is a Flow Sensor. if (isinf(FREQUENCY2)) By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I try to combine this code with other sensors code. lcd.print(vol); I hope someone could help me out. Measure Water Flow in literes using Arduino Mega 2560 Board and Water Flow Sensor. I am currently using this device for my thesis and i needed to combine these two! https://arduino.stackexchange.com/questions/75761/arduino-project-interrupt-error, water or any liquid flows through the sensor and quantity of water gets recorded, now according to quantity of water flown there is price decided, this price needs to be deducted by swiping rfid card, i haven't been able to control interrupts. If not, does anyone know of embedded solutions using servos or steppers maybe? Serial.println(FREQUENCY2); lcd.print("Rate: "); More like San Francis-go (Ep. float TIME = 0; Make sure to select one that will cover your needs. Measurable and meaningful skill levels for developers, San Francisco? // Calculated litres/hour I don't know how to deal with this error. I have tried your code using the sensor. By using attachInterrupt command, whenever there is a rise in the signal at pin 2, the flow function is called. */ lcd.setCursor(0,0); 20:45:25.971 -> 3fffff10: 40202b15 000000fe 00000000 00000000 Why did it take over 100 years for Britain to begin seriously colonising America? Due to this, whenever water flows through the valve it generates pulses. water Billing System using RFID(Mfrc522) on Arduino NANO. AMF Series 18/24/36 W Medical AC-DC Adaptors, TPP 180 and TPI 180 Medical and Industrial AC/DC Power Supplies, NTS/NTU Series Reliable, Safe, and Durable DC-AC Pure Sine Wave Inverters, IsoMOV Series Hybrid Protection Component. Z = pulseIn(input2, LOW); Answer } flowSensor = (2 * pulseCount) / calibrationFactor; // number of pulses in half a second, so twice that for a minute divided by the calibration factor. while (oldTime < sampleTime) { // loop to sample the flow sensors values oldTime = millis(); // gets the current time during the sample loop currentFlowValue = digitalRead(flowSensorPin); // sampling flow sensor if (initialFlowValue != currentFlowValue){ // if flow sensor value has changed from say high to low or low to high. 20:45:26.020 -> 3fffff40: 00000000 00000001 00000002 40201f62 I will appreciate if anyone could help me by buying the sensor (no matter if it is expensive) and to build the code using arduino or any other microcontroler. currentTime = millis(); Output rise time: 0.04us Where did you get the Frequency = 1000000/Time. Hi void setup() X = pulseIn(input1, LOW); i need the flowrate to start counting minimum flow to detect approximately 2l / h, Sir please provide a flow chart and block diagram, hi, thanks for useful tutorials Any help would be massivly appricated! Hi { Hi,thanks for the video and program. The code in this tutorial may be confusing for some. Submitted by Fadi K on Tue, 04/20/2021 - 03:03. Could you help me? A common 1/4 turn ball valve will provide the fractional flow you seek. } Connect YFS201 Hall Effect Water Flow Sensor VCC pins to 5V Power supply & GND to GND. Try downloading the Codebender plugin and clicking on the "Run on Arduino" button to program your Arduino board with this sketch. I tried this with an alternate flow meter, could not get it to work. 2 years ago. lcd.setCursor(0, 0); 20:45:25.971 -> After finding flow rate which is in liters/minute, divide it by 60 to convert it into liter/sec. Here only A0 used. Hi, how did you calculate the 4.5 for the calibration factor? on Step 3. lcd.print(vol); The working of the YFS201 water flow sensor is simple to understand. Although you mentioned the sensor is an analog sensor in this tutorial, its been considered as digital sensor in IoT water flow sensor tutorial. int X; Seems to be some discrepancies between the flow meter spec vs your text. The hall-effect sensor outputs the corresponding pulse signal. This question does not appear to be about Arduino, within the scope defined in the help center. oldTime = millis(); // gets the current time before the sample loop initialFlowValue = digitalRead(flowSensorPin); // gets the initial posostion of the flow sensor sampleTime = oldTime + 500; // sets the sampling time as 0.5 second. on Introduction, How i connect digital display to aurdino and water flow senser, About: Arduino Tutorials by Codebender.cc Team. lcd.print(l_minute); In this way, we can count the number of frequencies produces by the water flow sensor per second. The water flow sensor is integrated with a magnetic hall effect sensor, which generates an electric pulse with every revolution. How can one check whether tax money is being effectively used by the government for improving a nation? i want to convert the measured amount of water into its equivalent cost. The water flows through the sensor, which in turn rotates the wheel inside the sensor. l_minute = l_minute/60; can you please help me with this.?? We are using the header file of the LCD, which eases our interfacing the LCD with Arduino, and the pins 12,11,5,4,3,9 are allotted for data transfer between LCD and Arduino. Cooling body suit inside another insulated suit, Is there a better way of defining a constraint on positive integer variables such that no two variables are the same and are uniquely assigned a value. instead of total flow we need to show H.W F/R and C.W F/R By counting the pulses from the output of the sensor, you can easily calculate the water flow rate. Howerver, please do not copy the content to share on other websites. Adaptation Courtesy: hobbytronics.co.uk I want to build this device, and I would like to be ensure that the count is not lost if the power is lost. I hope you liked this, let me know in the comments. lcd.print(Hw F/R :0.00 L/M); volatile int flow_frequency; // Measures flow sensor pulses lcd.clear(); Sensor Type: Hall effect In this condition, we can observe pulses, which are generated from the sensor. 468). 20:45:26.020 -> 3fffffb0: feefeffe feefeffe 3ffe85e0 40100d69 This code are not give the output for nodemcu .What is the reason ? Rfid for access controlling and keypad for selecting amount/volume of water that is to be drawn. pinMode(input1, INPUT); Hall effect is the production of the potential difference across an electric conductor when a magnetic field is applied in the direction perpendicular to that of the flow of current. float LS = 0; Here we used only A0 .But for this we need to A0 and A1,right? You might apply 12 V to actuate, but then you can reduce the voltage very low (maybe 2 V or lower) and the valve will still say actuated. 20:45:26.020 -> 3fffff50: 401004ad 00000001 3ffee54c 40201f74 { { the one configured here is Because I think this situation is not normal. Question float WATER = 0; Durability: minimum 300,000 cycles. Dear sir water flow rate project practically very nice and I was making. It may be simpler to do so. it shows as large as total vilumv of 23 liters.. Copyright 2022Circuit Digest. total cost = total volume of water/unit cost of 1 litre water, Hi Alex, great work well done! How is making a down payment different from getting a smaller loan? lcd.clear(); float WATER2 = 0; It will need careful calibration if better than 10% precision is required. Now, can we make a closed loop system in which a pump would perform by PWM, driven by the Arduino to a calibrated flow rate and them check against itself with the flow meter? lcd.setCursor(0, 0); The flow rate pulse characteristics from the datasheet are given that frequency is 7.5 multiplied by flow rate. Pulses per Liter: 450 Im wondering what the reason is. Output fall time: 0.18us This value is added to the vol variable for every one second. } Can anyone help me to buildthe same project but this time by using an ultrasonic clamp-on flow sensor. And to display flow rate sensed by analog pin A1, add the line similar to that of A0. Serial.begin(9600); We are considering to make the video tutorials. Do you use a pump to circulate the water flow, if so maybe you have a better result with a variable pump speed (PWM), in state of a variable valve opening. No. on Step 2, Anybody can help me. For every interrupt signal, the count of the variable flow_frequency will be increased by 1. lcd.clear();
I did the same but it still not working though. The pressure can be created by liquid flow. What happened after the first video conference between Jason and Sarris? There will be no interrupt signal seen at the pin 2 of the Arduino, and the count of the flow_frequency will be zero. Undefined behavior (according to clang -fsanitize=integer) on libstdc++ std::random due to negative index on Mersenne Twister engine. The water flow sensor consists of a plastic valve body, a water rotor and a hall-effect sensor.
Closest equivalent to the Chinese jocular use of (occupational disease): job creates habits that manifest inappropriately outside work. The same thing happens in a solenoid valve: once you apply enough voltage to start motion, the motion will complete. Question Tip W = pulseIn(input1, HIGH); These are commercial type valves used to control water in heater systems and such. The below code repeatedly turns the water valve ON in five seconds and OFF in five seconds. It is the same for controlling gas flow. This sensor sits in line with your water line and contains a pinwheel sensor to measure how much liquid has moved through it. We appreciate it. These are not exotic, you will find many in all sorts of sizes. LiquidCrystal lcd(12, 11, 5, 4, 3, 9); The current time and cloopTime are used for the code to run in every 1 second. The shaft of the rotor is connected to a Hall effect sensor. I was stuggeling for quite a time to get my flow sensor working. { We took a lot of time and effort to create the content of this tutorial, please respect our work! lcd.begin(16, 2); 1 year ago. Working Humidity Range: 35%-80% RH I have a project to be made i.e. Which lead should I buy for my DC power supply? on Step 3. The project is to measure the liquid flow in a transparent 10mm tube and to detectany bubbles inside the passing liquid. The current time and cloopTIme variable ensure that for every one second the value of the flow_frequency is taken for calculation of flow rate and volume. lcd.print(" L"); int W; LS = WATER / 60; Did you make this project? /* And then connect LCD pins 4,6,11,12,13,14 to Arduino digital pins D7, D6, D5, D4, D3, D2. The solenoid will be all or nothing. If you buy the components through these links, We may get a commission at no extra cost to you. Click to enlarge image. The complete working can also be found in the video linked at the bottom of this page. I've been looking at water flow control with Arduino and I'm finding a huge difficulty in managing to do an 'analog' control on water flow. unsigned char flowsensor = 2; // Sensor Input The sensor that I have it has 20mm diameter, <1.75Mpa water pressure and ~30 L/m flow rate range. } Custom NanoLeaf Lights! The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry. lcd.print(L/M); Its design is in such a way that the hall effect sensor is sealed off from the water, and allows the sensor to stay safe and dry. Probably not what you're looking for. 1 year ago. In this flow meter, for every liter of liquid passing through it per minute, it outputs about 4.5 pulses. If you are new to Arduino and LCDs, you can consider reading this Interfacing Arduino and LCD Article. I can use a measured amount (I.E. The red wire is used for supply voltage which ranges from 5V to 18V and the black wire is connected to GND. // the loop function runs over and over again forever, Arduino - Button - Long Press Short Press, Arduino - Potentiometer Triggers Piezo Buzzer, Arduino - Potentiometer Triggers Servo Motor, Arduino - Servo Motor controlled by Potentiometer, Arduino - Ultrasonic Sensor - Piezo Buzzer, Arduino - Ultrasonic Sensor - Servo Motor, Arduino - Temperature Humidity Sensor - LCD, Arduino - Temperature Humidity Sensor - OLED Display, Arduino - Display Temperature from LM35 Sensor on OLED, Arduino - Display Temperature from LM35 Sensor on LCD, Arduino - Cooling System using DHT Sensor, Arduino - Cooling System using DS18B20 Temperature Sensor, Arduino - Button Controls Electromagnetic Lock, Arduino - Door Lock System using Password, Arduino - Controls 28BYJ-48 Stepper Motor using ULN2003 Driver, Arduino - Controls Stepper Motor using L298N Driver, Arduino - Log Data with Timestamp to SD Card, Arduino - Door Open - Send Email Notification, Arduino - Temperature - Send Email Notification, Example - 04.Single Blink Change Frequency, Example - 05.Multiple Blink Without Delay, LDR Darkness and Light Detector Sensor Electronic Circuit, Tutorial using serial LCD screen make Arduino speed curve recording, please give us motivation to make more tutorials. }