![]() Led will remain color it last was when in this undefined range. If (pressureround 145) //hysterisis is inherent between 120 & 145 psi. ![]() 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. The cycle continues as long as the air compressor cut off switch is in use.I'm trying to write an arduino program to control an air compressor pump/motor. As air is used and tank pressure drops to a specified ‘cut-in’ setting (approximately 30 PSI below the ‘cut-off’ setting) the relay contacts close and the motor starts again. When the specified system pressure is reached, a relay will control the electrical contacts apart, breaking the circuit and stopping the motor. When the compressor is plugged into the air compressor system, the motor starts and the air compressor begins to pressurize. Compared with the mechanical switch, it has the characteristics of simple operation, clear display, anti-vibration, and high control accuracy. The air compressor cut-in and air compressor cut off switch can automatically control the relay output according to the pressure in the tubing. Intelligent air compressor pressure switches made by LEFOO pressure control are instruments of pressure measurement, display, and control. A new pressure switch is usually more precise than repairing an old one, while adjustable digital pressure switches give you more convenience when using them. In pressure switch manufacturer, Picking the right air compressor pressure switches depending on what the air compressing system is. There are numerous types of lefoo pressure switch for air compressor cut off switch that come on the market. Monocrystalline Silicon Differential Pressure Transmitters.Monocrystalline Silicon Pressure Transmitter.
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