![\"Small](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/IMG_4138-scaled.jpg\")
Custom slot for light valve for other team to easily insert their light valve into our station.<\/p><\/div>\n
<\/p>\n
Yuxi<\/p>\n
![\"\"](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/\u672a\u547d\u540d.png\")
<\/p>\n
We try to connect servo motor and potentiometer directly with hot glue by a simpler method.<\/p>\n
<\/p>\n
![\"\"](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/111.png\")
<\/p>\n
We solved the problem of how to connect the pump to the Arduino Uno. The key is that we need a motor driver and how we need to connect it.<\/p>\n
<\/p>\n
![\"\"](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/222.png\")
<\/p>\n
When trying to get LCD Screen to work, the code would run on the simulator, but not on the actual LCD Screen. Finally it turned out to be a material problem.<\/p>\n
<\/p>\n
~~~<\/p>\n
Discussion:<\/p>\n
This project had its ups and downs. The best part was getting exposed to such a variety of devices and getting to put together a working gadget. We learned how to combine code with hardware, wire up circuits, write block diagrams and transfer said block diagrams to real circuits.<\/p>\n
Surprisingly, the part that was the easiest was getting the rudimentary signal to flow through the gadget (input to output). The hardest part was mapping the input signal to the output signal in a continuous fashion. The physical placing of the parts on the board was also challenging, since there were many wires and moving parts (literally) that hindered the goal of making a clean, intuitive layout.<\/p>\n
This project was also a great way to spread one’s wings creatively, since we could pick any intermediate transducer we wanted and create a narrative with our final project. Our narrative was of a sun and moon that would rise and set due to the change in water level in the graduated cylinders.<\/p>\n
The next step will be to focus on project 2, which is a great opportunity for us to work independently. Also losing the fixed theme, our creativity becomes more important and can be better reflected. This does not only mean a bigger challenge, but also an opportunity for us to make more progress. We hope to use the experience we have gained to better our next project.<\/p>\n
<\/p>\n
<\/p>\n
![\"\"](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/Project-1.jpg\")
<\/p>\n
<\/p>\n
\/\/ Double Transducer: Transparency -> Rotation -> Water Level\r\n\/\/ Contributors: Cameron, Ethan\r\n\/\/ Date: 2\/15\/23\r\n\/\/ This code facilitates the signal inputted by the photoresistor into an output signal\r\n\/\/ to the servo motor, which triggers a signal to the potentiometer which signals the\r\n\/\/ persitaltic pump.\r\n\/\/\r\n\/\/ ---------------------------\r\n\/\/ | PIN | LABEL |\r\n\/\/ ---------------------------\r\n\/\/ | PHOTORESPIN | A0 |\r\n\/\/ | LEDPIN | 6 |\r\n\/\/ | PUMPPIN1 | 3 |\r\n\/\/ | PUMPPIN2 | 4 |\r\n\/\/ | SERVOPIN | 10 |\r\n\/\/ | POTENTPIN | A5 |\r\n\/\/ ---------------------------\r\n\/\/ LCD Code from https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/tutorials\/I2C-lcd\r\n\/\/ by Robert Zacharias\r\n\r\n\r\n\/\/ LCD\r\n#include <Wire.h>\r\n#include <LiquidCrystal_I2C.h>\r\nLiquidCrystal_I2C screen(0x27, 16, 2);\r\nint x = 123;\r\n\r\nconst int PHOTORESPIN = A0;\r\nconst int PHOTOMIN = 5;\r\nconst int PHOTOMAX = 980;\r\n\r\n\r\nconst int LEDPIN = 6;\r\nconst int LEDMAX = 255;\r\nconst int LEDMIN = 0;\r\n\r\nconst int PUMPPIN1 = 3;\r\nconst int PUMPPIN2 = 4;\r\n\r\n#include <Servo.h>\r\nServo motor;\r\nconst int SERVOPIN = 10;\r\nconst int ROTMIN = 0;\r\nconst int ROTMAX = 150;\r\n\r\nconst int POTENTPIN = A5;\r\nint POTENTMAX = 631;\r\nint POTENTMIN = 276;\r\n\r\n\/\/ GLOBALS\r\nint rot = 0;\r\nint new_rot = 0;\r\n\r\n\/\/ MACROS\r\n#define min(a, b) ((a) < (b) ? (a) : (b))\r\n#define max(a, b) ((a) > (b) ? (a) : (b))\r\n\r\n\r\n\/\/LCD SCREEN\r\nvoid lcd_loop(int photoVal, int rotVal, int potVal, int ml){\r\n \/\/ just count up to show x changing (the rest of the text will remain untouched)\r\n screen.setCursor(0, 0);\r\n screen.print(\"i:\");\r\n screen.print(photoVal);\r\n screen.print(\" m:\");\r\n screen.print(rotVal);\r\n\r\n screen.setCursor(1, 9);\r\n screen.print(\" ->\");\r\n screen.print(potVal);\r\n screen.print(\" o:\");\r\n screen.print(ml);\r\n \r\n delay(1000);\r\n}\r\n\r\n\/\/ set ups\r\nvoid potent_setup(){\r\n pinMode(POTENTPIN, INPUT);\r\n}\r\n\r\n\r\nvoid pump_setup(){\r\n pinMode(PUMPPIN1, OUTPUT);\r\n pinMode(PUMPPIN2, OUTPUT);\r\n}\r\n\r\nvoid photo_setup(){\r\n pinMode(PHOTORESPIN,INPUT);\r\n}\r\n\r\nvoid servo_setup(){\r\n motor.attach(SERVOPIN);\r\n}\r\n\r\nvoid led_setup(){\r\n pinMode(LEDPIN, OUTPUT);\r\n}\r\n\r\n\/\/ led loop\r\nvoid led_loop(int i){\r\n Serial.print(\"LED AT LEVEL: \");\r\n Serial.println(i);\r\n analogWrite(LEDPIN, i);\r\n}\r\n\r\n\/\/ photo loop\r\nint photo_loop(){\r\n int photoVal = analogRead(PHOTORESPIN);\r\n Serial.print(\"Photo lvl: \");\r\n Serial.println(photoVal);\r\n return photoVal;\r\n}\r\n\r\n\r\n\/\/ pump loop\r\nint pump_loop(){\r\n Serial.println(\"Turning on pump\");\r\n int diff = abs(new_rot - rot);\r\n \/\/ if(diff < 50){\r\n \/\/ return;\r\n \/\/ }\r\n int time = map(POTENTMIN + diff, POTENTMIN, POTENTMAX, 800, 3000);\r\n \/\/ (we turned CW)\r\n if(new_rot > rot){\r\n Serial.print(\"We are pumping CW for this many ms: \");\r\n Serial.println(time);\r\n digitalWrite(PUMPPIN1, HIGH);\r\n delay(time);\r\n digitalWrite(PUMPPIN1, LOW);\r\n }\r\n \/\/ (we turned C'CW)\r\n if (new_rot < rot){\r\n Serial.print(\"We are pumping CCW for this many ms: \");\r\n Serial.println(time);\r\n digitalWrite(PUMPPIN2, HIGH);\r\n delay(time);\r\n digitalWrite(PUMPPIN2, LOW);\r\n }\r\n delay(time);\r\n return time;\r\n \r\n}\r\n\r\n\/\/ servo loop\r\nint servo_loop(int photoVal){\r\n int rot = map(photoVal, PHOTOMIN, PHOTOMAX, ROTMIN, ROTMAX);\r\n Serial.print(\"Servo rot: \");\r\n Serial.println(rot);\r\n\r\n motor.write(rot);\r\n \/\/ return its rotation\r\n return rot;\r\n}\r\n\r\n\/\/ potentiometer loop\r\nint potent_loop(){\r\n int potVal = analogRead(POTENTPIN);\r\n Serial.print(\"Pot val: \");\r\n Serial.println(potVal);\r\n\r\n \/\/ return its potential\r\n return potVal;\r\n}\r\n\r\n\r\n\r\n\/\/*********\r\n\r\nvoid setup() {\r\n Serial.begin(9600);\r\n\r\n \/\/ debug_setup();\r\n\r\n \/\/ LCD\r\n lcd_setup();\r\n \/\/ pump\r\n pump_setup();\r\n \/\/ photo\r\n photo_setup();\r\n \/\/servo\r\n servo_setup();\r\n \/\/led\r\n led_setup();\r\n \/\/ potent\r\n potent_setup();\r\n\r\n}\r\nint i = 0;\r\nbool reset = 0;\r\n\r\nvoid loop() {\r\n if(reset){\r\n \/\/fill debug\r\n digitalWrite(PUMPPIN2, HIGH);\r\n delay(1000);\r\n digitalWrite(PUMPPIN1, LOW);\r\n delay(1000);\r\n }\r\n else{\r\n Serial.println();\r\n\r\n \/\/ \/\/ debug_loop();\r\n \r\n led_loop(255);\r\n\r\n \/\/ read in from photo resistor\r\n int pV = photo_loop();\r\n\r\n \/\/ trigger server\r\n int sV = servo_loop(pV);\r\n\r\n \/\/ servo physically triggers potent\r\n\r\n \/\/ read in potent\r\n new_rot = potent_loop();\r\n POTENTMAX = max(POTENTMAX, new_rot);\r\n POTENTMIN = min(POTENTMIN, new_rot);\r\n\r\n \/\/ trigger pump\r\n int ml = pump_loop();\r\n \r\n lcd_loop(pV, sV, new_rot, ml);\r\n\r\n rot = new_rot;\r\n delay(1000);\r\n\r\n i += 10;\r\n if(i >= LEDMAX){\r\n i = LEDMAX; \r\n }\r\n }\r\n\r\n \r\n}\r\n\r\n\r\n\r\n\r\nvoid lcd_setup() {\r\n \/\/ initialize the screen (only need to do this once)\r\n screen.init();\r\n\r\n \/\/ turn on the backlight to start\r\n screen.backlight();\r\n\r\n \/\/ set cursor to home position, i.e. the upper left corner\r\n screen.home();\r\n \/\/ print the words Hello, world! onto the screen starting at the above cursor position\r\n screen.print(\"Hello, world!\");\r\n\r\n \/\/ move cursor to column 0, row 1\r\n screen.setCursor(0, 1);\r\n \/\/ print text starting in that position\r\n screen.print(\"2nd row text\");\r\n \r\n \r\n screen.display();\r\n screen.clear();\r\n\r\n\r\n \/\/ you can also display a variable on the screen\r\n screen.home();\r\n screen.print(\"x = \");\r\n screen.print(x);\r\n delay(1000);\r\n\r\n screen.clear();\r\n}\r\n\r\n\r\n\r\nvoid debug_setup(){\r\n Wire.begin();\r\n Serial.begin(9600);\r\n Serial.println(\"\\nI2C Scanner\");\r\n}\r\n\r\n\r\nvoid debug_loop() {\r\n byte error, address;\r\n int nDevices;\r\n\r\n Serial.println(\"Scanning...\");\r\n\r\n nDevices = 0;\r\n for (address = 1; address < 127; address++ )\r\n {\r\n \/\/ The i2c_scanner uses the return value of\r\n \/\/ the Write.endTransmisstion to see if\r\n \/\/ a device did acknowledge to the address.\r\n Wire.beginTransmission(address);\r\n error = Wire.endTransmission();\r\n\r\n if (error == 0)\r\n {\r\n Serial.print(\"I2C device found at address 0x\");\r\n if (address < 16)\r\n Serial.print(\"0\");\r\n Serial.print(address, HEX);\r\n Serial.println(\" !\");\r\n\r\n nDevices++;\r\n }\r\n else if (error == 4)\r\n {\r\n Serial.print(\"Unknown error at address 0x\");\r\n if (address < 16)\r\n Serial.print(\"0\");\r\n Serial.println(address, HEX);\r\n }\r\n }\r\n if (nDevices == 0)\r\n Serial.println(\"No I2C devices found\\n\");\r\n else\r\n Serial.println(\"done\\n\");\r\n\r\n delay(5000); \/\/ wait 5 seconds for next scan\r\n}\r\n<\/pre>\n <\/p>\n","protected":false},"excerpt":{"rendered":"
Full View: Yuxi Overall view of the project ~~~ Transparency station: Light valve is inserted between LED and photo-resistor Yuxi LED OFF LED ON…<\/p>\n","protected":false},"author":40,"featured_media":17201,"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\/17170"}],"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\/40"}],"replies":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/comments?post=17170"}],"version-history":[{"count":18,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/posts\/17170\/revisions"}],"predecessor-version":[{"id":17510,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/posts\/17170\/revisions\/17510"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/media\/17201"}],"wp:attachment":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/media?parent=17170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/categories?post=17170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-json\/wp\/v2\/tags?post=17170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"Top](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/IMG_4153-scaled.jpg\")
![\"\"](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/DSC01222.jpg\")
<\/p>\n![\"Transparency](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/EB721CFA-5F2D-4ABF-90CB-E7D971F54EF1-scaled.jpeg\")
![\"Transparency](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/367A01DA-BCBC-49B2-B4E1-F5A157AEEEAE-scaled.jpeg\")
![\"\"](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/LED-Off-scaled.jpg\")
<\/p>\n![\"\"](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/Photoresistor-LED-ON-scaled.jpeg\")
<\/p>\n![\"Servo](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/9F0F8452-335E-4994-BB42-E43A148BA3CA-scaled.jpg\")
![\"\"](\"https:\/\/courses.ideate.cmu.edu\/60-223\/s2023\/work\/wp-content\/uploads\/2023\/02\/ServoMotor-Potentiometer-scaled.jpg\")
<\/p>\n