(Backstory) So, I took an computer engineering class in high school (grade 11 level), where I learned a bit about breadboarding as well as arduinos (I would like to stress a bit). It has been 5 years, and I don't remember much; but the other day my little brother started taking the same class. He has the following assignment, which I have also endeavored to try for fun:
(Not Backstory) I need to make a potentiometer control a 7-segment display so that it displays a number (0-9) based on the potentiometers value. I hopped on to tinkercad to test stuff out before acuatally doing anything, and I came up with the following real quick:
I've tested the above model and I know it works, but the following code does not work.
int a = 2;int b = 3;int c = 4;int d = 5;int e = 6;int f = 7;int g = 8;int potentiometer = 9;void setup() { for(int pins = 2; pins <=8; pins++){ pinMode(pins, OUTPUT); } pinMode(potentiometer, INPUT);}void loop() { int pRes; pRes = analogRead(potentiometer); if (pRes >=0 && pRes <=101){ //0 digitalWrite(a, LOW); digitalWrite(b, LOW); digitalWrite(c, LOW); digitalWrite(d, LOW); digitalWrite(e, LOW); digitalWrite(f, LOW); digitalWrite(g, HIGH); } else if (pRes >=102 && pRes <=203){ //1 digitalWrite(a, HIGH); digitalWrite(b, LOW); digitalWrite(c, LOW); digitalWrite(d, HIGH); digitalWrite(e, HIGH); digitalWrite(f, HIGH); digitalWrite(g, HIGH); } else if (pRes >=204 && pRes <=305){ //2 digitalWrite(a, LOW); digitalWrite(b, LOW); digitalWrite(c, HIGH); digitalWrite(d, LOW); digitalWrite(e, LOW); digitalWrite(f, HIGH); digitalWrite(g, LOW); } else if (pRes >=306 && pRes <=407){ //3 digitalWrite(a, LOW); digitalWrite(b, LOW); digitalWrite(c, LOW); digitalWrite(d, LOW); digitalWrite(e, HIGH); digitalWrite(f, HIGH); digitalWrite(g, LOW); } else if (pRes >=408 && pRes <=509){ //4 digitalWrite(a, HIGH); digitalWrite(b, LOW); digitalWrite(c, LOW); digitalWrite(d, HIGH); digitalWrite(e, HIGH); digitalWrite(f, LOW); digitalWrite(g, LOW); } else if (pRes >=510 && pRes <=611){ //5 digitalWrite(a, LOW); digitalWrite(b, HIGH); digitalWrite(c, LOW); digitalWrite(d, LOW); digitalWrite(e, HIGH); digitalWrite(f, LOW); digitalWrite(g, LOW); } else if (pRes >=612 && pRes <=713){ //6 digitalWrite(a, LOW); digitalWrite(b, HIGH); digitalWrite(c, LOW); digitalWrite(d, LOW); digitalWrite(e, LOW); digitalWrite(f, LOW); digitalWrite(g, LOW); } else if (pRes >=714 && pRes <=815){ //7 digitalWrite(a, LOW); digitalWrite(b, LOW); digitalWrite(c, LOW); digitalWrite(d, HIGH); digitalWrite(e, HIGH); digitalWrite(f, HIGH); digitalWrite(g, HIGH); } else if (pRes >=816 && pRes <=917){ //8 digitalWrite(a, LOW); digitalWrite(b, LOW); digitalWrite(c, LOW); digitalWrite(d, LOW); digitalWrite(e, LOW); digitalWrite(f, LOW); digitalWrite(g, LOW); } else if (pRes >=918 && pRes <=1023){ //9 digitalWrite(a, LOW); digitalWrite(b, LOW); digitalWrite(c, LOW); digitalWrite(d, HIGH); digitalWrite(e, HIGH); digitalWrite(f, LOW); digitalWrite(g, LOW); }}Can someone explain to me what I've done wrong (and offer corrections)?
- 1In what way does it "not work"?Majenko– Majenko2022-01-24 19:01:50 +00:00CommentedJan 24, 2022 at 19:01
- I think you wired the potentiometer incorrectly. The middle pin goes to an analog input pin (you used a digital pin on one of the outer pins), the outer pins to ground and 5V respectively.chrisl– chrisl2022-01-24 19:16:24 +00:00CommentedJan 24, 2022 at 19:16
- i see no debugging code ... how do you know that the pot is being read as expected?jsotola– jsotola2022-01-24 19:21:18 +00:00CommentedJan 24, 2022 at 19:21
