[werk_ag]

Continuing the questions about the Air Quality Monitor:

• What is the current draw (amperage) of the final released board while it is running?
  
  
• From the parts list, the Air Quality Monitor requires a 9 Volt, 1 Amp power supply to drive the board. Will this current draw make it impractical to run on a 12V solar set up with appropriate voltage regulators?
  

There is something about this some topics above, but let's add some details:

Its hard to say exactly what is the average consumption of the AQM board, but it can perfectly be powered trough a solar system.
I will try to give and idea for a system with the PMS7003 + MH-Z19, RF transmitter, without LCD display.

- There will be a fixed consumption of around 120mA. 60 mA for the Arduino Nano plus 60mA for the MH-Z19 (it don't have any sleep mode, its always working)
(In the future, its possible that I implement some Arduino power save features)
- Each 37 seconds, during transmission of the RF signal (less than a second), consumption will increase 30mA.
- At each 15 minutes, during the time (40 seconds) needed to read the PMS7003, the fixed consumption increases 100mA. After each reading the PMS7003 is putted in sleep mode (consumption <= 200uA) until the next reading.
- During the time (few seconds only) needed to read the MH-Z19, the fixed consumption will increase 80mA.
The two sensors never are read at the same time.

So, the maximum peak consumption for the configuration described above will not exceed 400mA.