Neus: Difference between revisions

Latest revision as of 21:49, 5 May 2016

Neus (or "Nose" for Dutch impaired people) sniffs the gasses that are sucked out of the klusbunker. It's that little pcb screwed onto the right wall.

The measurements can be viewed at https://keetweej.vanheusden.com/revspace/nose.php. Note that you can click on most (not the one at the top) graphs to view a heatmap of the measurements.

it uses 7-10 watt (because the sensors have little heaters in them)
has 8 MQ-sensors
Arduino based
talks via an NRF24L01 with the rest of the space
has a DHT11 for temperature/humidity
temp/hum may have an offset because they are in the airway and because they are located to 8 heaters(!)
if I remember correctly, I used this bunch of sensors. these are the MQ-sensors with some extra logic soldered on a breakout board.

Initially designed/soldered by Flok. Later on Benadski boosted the sensitiviy of the sensors by replacing the 1k resistors with 10k ones.

@@ Line 55: / Line 55: @@
 * some measurement says 499 while the calibrated measurer says 907 PPM
+=== MQ-7 ===
+* [http://www.savvymicrocontrollersolutions.com/arduino.php?topic=arduino-mq7-CO-gas-sensor http://www.savvymicrocontrollersolutions.com/arduino.php?topic=arduino-mq7-CO-gas-sensor] how to convert the readings into a PPM value
 == who ==