Humidity meter - Idea
I was having issues with the humidity of our CO2 incubators; the first step in the solution was to measure and log the humidity. When I looked, humidity loggers were costing in excess of £100, more than I wanted to spend on a something which would be used a couple of times for a quick look.
DHT22-Humidity meter
As usual Adafruit had what I needed in the form of the DHT22 temperature and humidity sensor and a nice tutorial on getting readings with an arduino. Couple this with an SD card and you have the makings of a humidity logger.
DHT22 £10
SD breakout £10
Arduino £22
Micro sd card £2
Resistor (10K) £0.1
Total ~£45
With a case, a “boardunio” and a 9v power supply this could easily become a permanent feature of an incubator. Mine will be recycled into something else when it has finished doing what it was built for.
UPDATE:
The schematic for the meter can be found here!
The sketch for the meter logging can be found here!
As usual Adafruit had what I needed in the form of the DHT22 temperature and humidity sensor and a nice tutorial on getting readings with an arduino. Couple this with an SD card and you have the makings of a humidity logger.
DHT22 £10
SD breakout £10
Arduino £22
Micro sd card £2
Resistor (10K) £0.1
Total ~£45
With a case, a “boardunio” and a 9v power supply this could easily become a permanent feature of an incubator. Mine will be recycled into something else when it has finished doing what it was built for.
UPDATE:
The schematic for the meter can be found here!
The sketch for the meter logging can be found here!
Comments
Post a Comment