#AIR COMPRESSOR ON OFF SWITCH CODE#

If not, I really can’t imagine what the second one would do. If you can figure out a way to use a pressure transducer as a clock, add a second one by all means. It says so you can see the pressure read out but you are not updating the LCD at that point so what pressure are you looking at in 3/10ths of a second? I'm just curious as to why you have the below delay: delay(300) // Pause for 3/10ths of a second to you can see the pressure readout on the lcd Just count '15(or some number of) seconds right after the pump shut off' and open the valve for that time. If what you have described is all you need then i agree with weedpharma. Perhaps a little more information for what purpose you think the second transducer will serve would be helpful. One for main pressure, one for front suspension pressure, and one for rear suspension pressure. I plan to do something very similar on my jeep in the near future and i will have to have three transducers. A pressure transducer would be essential. Now, if you wanted to close the valve when the pressure dropped to some level, then I can't imagine how a clock would be useful. If not, I really can't imagine what the second one would do. Led.setColor(2) // Set LED color to red(pump off) if pressure is greater than 145 psiĭelay(300) // Pause for 3/10ths of a second to you can see the pressure readout on the lcd Led will remain color it last was when in this undefined range. If (pressureround 145) //hysterisis is inherent between 120 & 145 psi.

#AIR COMPRESSOR ON OFF SWITCH CODE#

LED ouput portion of code and hysterisis(will also be SSR output portion once it's added) Lcd.print ('0') // print out the pressure reading as 0 incase of instance of -pressure reading(not sure if this is necessary) Lcd.print (pressureround) // print out the pressure reading assuming the reading is greater than 0 If (pressureround > 0) // LCD output portion of code Int pressureround = round(pressure) // Round the pressure reading to the nearest whole digit 5v to 4.5v, then convert to pressure(psi) Int reading = analogRead(A0) // Read pressure transducer raw data(0-1024)įloat voltage = reading * 5.0 // Convert transducer reading to voltage(0 - 5v)įloat pressure = (voltage -.5) * 50 // Scale voltage reading since transducer voltage signal range is. Lcd.setCursor(0,1) // position cursor for next pressure reading output Lcd.print(' ') // clear the previous pressure reading output(3 digits, or columns long) Lcd.setCursor(0,1) //Position cursor in prepartion for deletion of last pressure reading output Led.setColor(1) //set led color to ? should change this to zero(LED off) at startup.need to test Lcd.print('PSI') // Print a heading for units of measurment Lcd.setCursor(4,1) // Set the LCD cursor to the 5th column of the 2nd row Lcd.print('Air Pressure') //Print a heading for the PSI reading to be measured Lcd.setCursor(0,0) // Set the LCD cursor to column 0, line 1 Lcd.setBacklight(ON) // Turn on LCD backlight set up the LCD's number of columns and rows: These #defines make it easy to set the backlight color However, you can connect other I2C sensors to the I2C bus and shareĪdafruit_RGBLCDShield lcd = Adafruit_RGBLCDShield() this is Analog 4 and 5 so you can't use those for analogRead() anymore The shield uses the I2C SCL and SDA pins. Is it possible for me to do that without adding a second pressure transducer to reference? /*********************Īrduino Based Air Compressor switch code using a 0-200 PSI pressure transducer

Ideally I would like it to open up for 15(or some number of) seconds right after the pump shut off. However, I’m not sure how I would turn on the 12v solenoid after the pump shuts down. Unloading pressure in the air line between the pump and the check valve will be handled by a 12v pneumatic solenoid. A bicolor LED will toggle colors indicating state of compressor pump(green = running, red =not running). The arduino will control the air compressor pump motor through an SSR(I haven’t added the output to the ssr yet). I have a 200 psi pressure transducer to read the pressure in the tank. I’m trying to write an arduino program to control an air compressor pump/motor.

Air compressor on off switch