{"id":17458,"date":"2023-02-15T08:17:43","date_gmt":"2023-02-15T13:17:43","guid":{"rendered":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/?p=17458"},"modified":"2023-02-19T17:15:46","modified_gmt":"2023-02-19T22:15:46","slug":"double-transducer-water-level-to-rotational-speed","status":"publish","type":"post","link":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/double-transducer-water-level-to-rotational-speed\/","title":{"rendered":"Double Transducer: Water level to Rotational Speed"},"content":{"rendered":"

Peiran Ge, Quinten Staples.<\/p>\n

 <\/p>\n

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Top View of Peiran’s double transducer. Water level (bottom left), rotational speed (top right)<\/p><\/div>\n

\"\u201cImage

Top View of Quinten’s double transducer – Water Level (left), rotational speed (right)<\/p><\/div>\n

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Detail on the structure that separates each photoresistor<\/p><\/div>\n

 <\/p>\n

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Combinations of different LED representations.<\/p><\/div>\n

\"Image

(Quinten) Image of breadboard with L293D Motor Driver and cables attaching to Arduino and DC Motor<\/p><\/div>\n

Final Video:<\/strong><\/p>\n

Peiran<\/p>\n

 <\/p>\n

The ultrasonic ranger detects the water level, or distance to the object, which changes how 4 LEDs light up. Photoresistors then sense these light changes, and the Arduino Uno alters the motor’s rotational speed based on what the photoresistors read.<\/p>\n

 <\/p>\n

Quinten<\/p>\n

The ultrasonic ranger works to detect distance and would probably read water levels somewhat well. The ultrasonic ranger is able to drive the 4 LEDs light output. At this point the photoresistors should pick up the light output from the LEDs and drive the DC motor’s speed. The system works up until the photoresistors and the DC motor.<\/p>\n

IMG_9351<\/a><\/p>\n

 <\/p>\n

Process:<\/strong><\/p>\n

 <\/p>\n

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Experimenting with how to best exclude outside lighting for the photo-resistors.<\/p><\/div>\n

\"TinkerCad

TinkerCad Model of Double Transducer- Water Level to Rotational Speed<\/p><\/div>\n

\"Process

Process Image of Quinten’s double transducer. Laying out physical components to match TinkerCad diagram<\/p><\/div>\n

Discussion:<\/strong><\/p>\n

Since our task was to only detect water levels, not manipulate them, the first part of this project was not as challenging. Both of us decided to just place the ultrasonic ranger on the board without worrying about actual water levels. We were also able to visually display the LEDs in a way that’s easy to understand and distinguish between various levels.<\/p>\n

However, there was a lot of debugging, especially with code, and both of our projects didn’t end up successfully performing the target task. It is a bit disappointing, but overall this has been an extremely eye-opening experience. Getting the middle stage of the double transducer was more difficult than I had expected. Even with the LEDs scaling in brightness to the ultrasonic ranger’s distance readings, it was hard to get the photoresistors to read and control the motor speed the way we intended. Utilizing online documentation of past projects was a huge help in troubleshooting and figuring out our code and setup.<\/p>\n

 <\/p>\n

Diagram and Schematic:<\/strong><\/p>\n

 <\/p>\n

 <\/p>\n

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Block Diagram<\/p><\/div>\n

\"Block

(Quinten) Block Diagram<\/p><\/div>\n

 <\/p>\n

\"\"<\/p>\n

Code:<\/strong><\/p>\n

#include <Servo.h>\r\n#include <NewPing.h>\r\n\r\nconst int trigger = 5; \/\/ultrasonic ranger\r\nconst int echo = 4;\r\nconst int maxDist = 30; \/\/in centimeters\r\nconst int ServoPin = 11; \/\/Motor\r\nconst int Red = 13; \/\/LED pins by color\r\nconst int Yellow = 12;\r\nconst int Blue = 7;\r\nconst int Green = 8;\r\nconst int Redresis = A0; \/\/Photoresistors by color of LED\r\nconst int Yellowresis = A1;\r\nconst int Greenresis = A2;\r\nconst int Blueresis = A3;\r\n  \/\/Global Variables fore pin numbers.\r\n  \/\/Referencing to code structure guide from class website\r\n\r\nServo Motor;\r\nNewPing sonar(trigger, echo, maxDist);\r\n\/\/Referencing tutorial pages from class website\r\n\r\nint Dist,\r\n    Display,\r\n    Brightness,\r\n    Speed;\r\n  \/\/Variables for input\/storing information\r\n\r\nvoid setup() {\r\n  Motor.attach(ServoPin);\r\n  pinMode(Redresis, INPUT);\r\n  pinMode(Yellowresis, INPUT);\r\n  pinMode(Greenresis, INPUT);\r\n  pinMode(Blueresis, INPUT);\r\n  pinMode(Greenresis, INPUT);\r\n  \r\n  pinMode(Red, OUTPUT);\r\n  pinMode(Yellow, OUTPUT);\r\n  pinMode(Green, OUTPUT);\r\n  pinMode(Blue, OUTPUT);  \r\n\r\n  pinMode(Speed,OUTPUT);\r\n  pinMode(ServoPin,OUTPUT);\r\n}\r\n\r\nvoid loop() {\r\n  \/\/detect water level\r\n  delay(50);\r\n  Dist = sonar.ping_cm();\r\n  DisplayLED ();\r\n\r\n\/\/Photoresistor\r\n  Brightness = 0;\r\nint Redval;\r\n  Redval = analogRead(Redresis);\r\n  if (Redval >= 300) {\r\n    Brightness += 1;   \r\n  } \/\/referencing class website for photoresistor\r\n\r\nint Yellowval;\r\n  Yellowval = analogRead(Yellowresis);\r\n  if (Yellowval >= 300) {\r\n    Brightness += 2;   \r\n  }\r\n\r\nint Greenval;\r\n  Greenval = analogRead(Greenresis);\r\n  if (Greenval >= 300) {\r\n    Brightness += 4;   \r\n  }\r\n\r\nint Blueval;\r\n  Blueval = analogRead(Blueresis);\r\n  if (Blueval >= 300) {\r\n    Brightness += 8;   \r\n  }  \r\n  \r\n\/\/motor speed\r\nSpeed = 200\/Brightness;\r\n  Motor.write(0);\r\n  delay(Speed);\r\n  Motor.write(180);\r\n  delay(Speed);\r\n}\r\n\r\nvoid DisplayLED() {\r\nDisplay = Dist\/2;\r\nif (Display%2 == 1){\r\n    digitalWrite(Red, HIGH);  \r\n  } \r\n  \r\nif (Display%4 == 2 || Display%4 == 3){\r\n    digitalWrite(Yellow, HIGH); \r\n  }\r\n\r\nif ((Display-3)%8 <= 4){\r\n    digitalWrite(Green, HIGH);  \r\n  }\r\n\r\nif (Display >= 8){\r\n    digitalWrite(Blue, HIGH);  \r\n  } \r\n}<\/pre>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
Peiran Ge, Quinten Staples.     Final Video: Peiran   The ultrasonic ranger detects the water level, or distance to the object, which changes how 4 LEDs light…<\/p>\n","protected":false},"author":51,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[86],"tags":[],"_links":{"self":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/posts\/17458"}],"collection":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/users\/51"}],"replies":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/comments?post=17458"}],"version-history":[{"count":5,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/posts\/17458\/revisions"}],"predecessor-version":[{"id":17543,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/posts\/17458\/revisions\/17543"}],"wp:attachment":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/media?parent=17458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/categories?post=17458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/tags?post=17458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}