Newbie here to coding.
I'm looking for help with code.
Analog pin measures voltage- I use voltage divider here ( voltage higher >5V). I need code that will set digital output pin "X" LOW if read voltage is 10V or lower and set that pin HIGH if voltage is 13 or higher.
Any help will be appreciated.
Part of the code that I use for voltage measurement :
Please post your full sketch, using code tags when you do
Posting your code using code tags prevents parts of it being interpreted as HTML coding and makes it easier to copy for examination
In my experience the easiest way to tidy up the code and add the code tags is as follows
Start by tidying up your code by using Tools/Auto Format in the IDE to make it easier to read. Then use Edit/Copy for Forum and paste what was copied in a new reply. Code tags will have been added to the code to make it easy to read in the forum thus making it easier to provide help.
It is also helpful to post error messages in code tags as it makes it easier to scroll through them and copy them for examination
So much of programming is about attention and detail.
What is missing in the code in post #1?
One thing of many is the part where the digital pin goes LOW or HIGH.
It's like someone didn't bother learning how.
/*
Blink
Turns an LED on for one second, then off for one second, repeatedly.
Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
the correct LED pin independent of which board is used.
If you want to know what pin the on-board LED is connected to on your Arduino
model, check the Technical Specs of your board at:
https://www.arduino.cc/en/Main/Products
modified 8 May 2014
by Scott Fitzgerald
modified 2 Sep 2016
by Arturo Guadalupi
modified 8 Sep 2016
by Colby Newman
This example code is in the public domain.
https://www.arduino.cc/en/Tutorial/BuiltInExamples/Blink
*/
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
NO, you don't learn anything that way.
Just an FYI, my first computer was 1959, before Steve Jobbs attended kindergarten.
I had to learn by reading. I will point you in the right direction, but I rarely give complete solutions.
You really need to learn boolean logic, less than or equal is NOT the same as less than.
There is no matrix download, day 2.
What you would learn to keep takes long term memory.
Here is a Section 5 Tutorial built into the IDE:
/*
Conditionals - If statement
This example demonstrates the use of if() statements.
It reads the state of a potentiometer (an analog input) and turns on an LED
only if the potentiometer goes above a certain threshold level. It prints the
analog value regardless of the level.
The circuit:
- potentiometer
Center pin of the potentiometer goes to analog pin 0.
Side pins of the potentiometer go to +5V and ground.
- LED connected from digital pin 13 to ground through 220 ohm resistor
- Note: On most Arduino boards, there is already an LED on the board connected
to pin 13, so you don't need any extra components for this example.
created 17 Jan 2009
modified 9 Apr 2012
by Tom Igoe
This example code is in the public domain.
https://www.arduino.cc/en/Tutorial/BuiltInExamples/ifStatementConditional
*/
// These constants won't change:
const int analogPin = A0; // pin that the sensor is attached to
const int ledPin = 13; // pin that the LED is attached to
const int threshold = 400; // an arbitrary threshold level that's in the range of the analog input
void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize serial communications:
Serial.begin(9600);
}
void loop() {
// read the value of the potentiometer:
int analogValue = analogRead(analogPin);
// if the analog value is high enough, turn on the LED:
if (analogValue > threshold) {
digitalWrite(ledPin, HIGH);
} else {
digitalWrite(ledPin, LOW);
}
// print the analog value:
Serial.println(analogValue);
delay(1); // delay in between reads for stability
}
