Skip to content

Instantly share code, notes, and snippets.

@claytantor
Created December 30, 2013 02:51
Show Gist options
  • Save claytantor/8177242 to your computer and use it in GitHub Desktop.
Save claytantor/8177242 to your computer and use it in GitHub Desktop.
This is an arduino sketch to control a 12v solenoid in a timed loop. It will pressurize a chamber at a specific rate and then power the valve venting the chamber.
/*
valve_60
Turns on an 12v selenoid on, then off, repeatedly.
*/
// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
const int valve = 13;
const int led = 9;
const int vent_time_min = 10; //10 sec
const int pressure_time_min = 60*10; //10 min
int counter = 0;
int switch_val = 0;
int modulo_led = 0;
int modulo_valve = 0;
int toggle_time_valve = millis();
int toggle_time_led = millis();
int valve_state = 0;
int min_ms = 1000*60;
// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
Serial.begin(9600);
pinMode(valve, OUTPUT);
digitalWrite(valve, LOW);
switch_val = 0;
toggle_time_valve = millis();
pinMode(led, OUTPUT);
}
// the loop routine runs over and over again forever:
void loop() {
int millis_time = millis();
modulo_led = millis_time % 1000;
modulo_valve = millis_time % vent_time_min;
//there is a timer against millis
//if the valve is in an off position and the pressure timer has expired then vent
// and set the timer to count to the vent time
if (counter > pressure_time_min && switch_val==0) {
/*Serial.print("setting to valve to HIGH at:");
Serial.print(millis_time);
Serial.print(" switch:");
Serial.println(switch_val);*/
digitalWrite(valve, HIGH); // turn on the valve
switch_val = 1;
counter = 0;
}
//else if the valve is on and the vent timer has expired then close the valve
// and set the timer to count up to the pressure time
else if (counter>vent_time_min && switch_val==1) {
/*Serial.print("setting to valve to LOW at:");
Serial.print(millis_time);
Serial.print(" switch:");
Serial.println(switch_val); */
digitalWrite(valve, LOW); // turn off the valve
switch_val = 0;
counter = 0;
}
//this manages a timer led that uses the same approach
if (modulo_led == 0 && LOW == digitalRead(led)) {
digitalWrite(led, HIGH); // turn on the valve
toggle_time_led = millis_time+1000;
/*Serial.print("LED Time:");
Serial.print(millis_time);
Serial.print(" counter:");
Serial.println(counter); */
counter+=1;
} else if (millis_time > toggle_time_led && HIGH == digitalRead(led)) {
digitalWrite(led, LOW); // turn on the valve
counter+=1;
}
}
@friendlypo
Copy link

how about the connection thru Microcontroller and the materials to be used

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment