Today I planned to program the Raspberry Pi in order to start the filtration pump and turn on the underwater lights when we are using the jacuzzi.
I needed some magnetic contacts in order to close a contact pin from the GPIO. Unfortunately, it seems that most hardware store are no more carrying these in their inventory. So I bought a cheap door alarm and disassembled it in order to use the magnetic contact for my sensor.
The jaccuzzi.ch team created a lot of jacuzzi based on wooden palettes frames, like the one we built during the ig100 event in Crans-Montana.
For this one, we wanted something that can be isolated in order to avoid excessive heat losses during night. Following an unfortunate encounter between a forklift and a sectional door, we had the raw material.
After a day of sawing, drilling and grinding, we had 13 isolated panels assembled to form our 3m diagonal jacuzzi frame.
As a long time fan of the 1-wire bus, and due to its integration on the Raspberry Pi chipset, I decided to build some probes for the jacuzzi.
The idea is taken from this DIY waterproof probe based on the DS18B20 1-wire sensor. I tried to keep it small, so I choose a Bic pen tube as the container.
Unfortunately, the diameter of the tube was too small and the sensor was not correctly immersed in silicon. For the second edition, I used a pen tube from our university… Now I have nice probes that are really waterproof, but a bit larger than the first try.
To measure temperatures in the cabin, outdoor and on the heater circuits, I needed some probes that I could chain together. For these ones, I used RJ45 female adapters and put the sensor inside the case. Both sides of the adapters are wired together, so it’s quite easy to solder a sensor between the RJ45 sockets.
After enjoying the pleasure of a hot-tub in front of the house during our Whistler holidays, we decided to repeat the experience in Lyss…
I should say… the experiment as this will be a wood heated home made Jacuzzi!
The project started some weeks ago while meeting with Nicolas, the proud owner of a hand made Jacuzzi and best maker I know.
A four weeks long experiment to build and operate a wood fired hot tub