Oxygen Concentrator based on the WHO technical specifications for oxygen concentrators

This was a class project for the microprocessors class at my university. The project was to make an Oxygen generator it didn't matter the type or application, but after researching I decided to make a portable concetrator, something that I thought it would be more interesting for me at the time. So I implemented the WHO technical specifications for oxygen concentrators, there's a lot to consider specially for whom might use the concentrator.

• ISIS proteus 8.11
• MicroC
• Microchip PIC18F45K22

This project is based on the Pressure Swing Process (PSA) concentrators, and it considers both pedriatic and geriatic usage, according to the WHO technical specifications it requires:

• A flowrate up to 2 LPM for infants and up to 10 LPM for adults
• An oxygen concentration greater than 85% or near 100% (100% oxygen is almost never used because it's poisonous)
  • Most concentrators produce an oxygen concentrator between 82% and 96%, the oxygen concentrator must activate an alarm if the concentration is less than 82%
• The oxygen concentrator must maintain the maximum rated flowrate at 40°C, 95% relative humidity

• An LCD display (20 x 4)
• 4 buttons
• A buzzer speaker
• Pressure sensor (MPX4250)
• 2 relays (valves)
• 3 LEDs
• Temperature sensor (TO92-100)
• Relative humidity sensor (HIH5030)
• A motor (pump)
• Potentiometer (flowrate control)

After installing Proteus, and MicroC, you need to generate and .hex file, and upload it to the PIC on Proteus, then you can check the simulation.