Visibility sensor for divers
Planning a scuba dive will be much easier with the data of visibility sensors on the divespot.
When you’re planning a scuba dive, it’s nice to know the visibility of the water at the dive spot. This system will contain a sensor module in the water with a temperature sensor and a visibility sensor. The MKR1000 on the side of the water will send the data wireless to the closest WiFi-hotspot (a diving centre for example). The data will be available to everyone!
It’s a big disappointment when you’re all geared on the side of the divespot, and the water looks like a messy soup. When you have access to the data of multiple sensors on multiple dive locations, you can decide where to dive, based on the visibility of that moment.
The sensor is based on a LED that shines on a light sensor. This way we can measure the amount of light that comes trough the water. When there are a lot of particles in the water (meaning bad visibility), the light that the light sensor will receive is less.
I have to say that this is a guide to making a test unit for near your house. The network cable can’t be too long, because I2C can’t handle more than 5 meters of cable. I’m planning on testing it for a while. When the results are reliable enough, I will update this page with a version that can be placed at every dive spot.
To have as less disruption by the sunlight as possible, the sensor and the LED will be mounted in a bucket or big pipe. The bucket/pipe will lay on it’s side (see picture below). This way there’s no sunlight reaching the sensor.
The sensor can be build as displayed here:
Try to keep it as small as possible, especially the sensor and the LED. Mine looked like this after all the soldering:
Read more: Visibility sensor for divers
JLCPCB – Prototype 10 PCBs for $2 + 2 days Lead Time
China’s Largest PCB Prototype Enterprise, 300,000+ Customers & 10,000+ Online Orders Per Day
Inside a huge PCB factory: https://www.youtube.com/watch?v=_XCznQFV-Mw