Outdoor UV index sensor
Here are instructions for outdoor UV index and ambient light sensor.
Continue reading ‘Outdoor UV index sensor’ »Contact: info@pavlin.si
Here are instructions for outdoor UV index and ambient light sensor.
Continue reading ‘Outdoor UV index sensor’ »The solar radiation shield is a low cost DIY device to protect temperature, relative humidity and other sensors from the weather, while shielding them from the sun for highest accuracy. Provided here are instructions and files. It require some CNC machinig, but then it could be assembled in minutes. It is made from plant pot saucers.
Continue reading ‘Low cost solar radiation shield’ »A multisensor LoRa end device has been designed for connecting different sensors to LoRa network. It’s primary use can be LoRa weather station but is not limited only to enviromental applications.
Typical “weather” application is shown in image above: 1-LoRa sensor interface, 2-Particle sensor, 3-Sun shield with temperature and humidity sensors, 4-UV-index and illumination sensor, 5-solar panel for autonomous operation. Different sensors will be described separately. I hope this project could grow into different directions.
Continue reading ‘Multisensor LoRa interface module’ »Amazfit pace went swimming and drowned 🙂 After unsuccessful warranty claim I put watch in the drawer and forget about it because it looks “unopenable”. Today I learned it could be opened easily when heated. So I decided to try it. I grabbed hot air gun and shot few blows into the housing heating up to 80°C. It is just below 85°C, which could be a limit for some electronic components.
The disasembly was piece of cake. Just separate the two pieces.
I designed simple two pice toothbrush stand for 8 brushes. In our large family it is sometimes hard to track the toothbrushes only by color. I decided to put this issue in order by ordering the brushes with two simple 3D printed parts. Front one has magnets for removing from the shelf when needed due to cleaning.
Model files are in this file: STEP, PARASOLID and Solidworks
Two magnets (12mm dia, 2mm thick) are attached with epoxy into front holder. Add two more magnets and attach with epoxy to the uderside of the shelf as shown in the first picture.After curing/drying the holder can be removed and cleaned.
Rear holder is attached with two side self adhesive.
Grabcad project: https://grabcad.com/library/toothbrush-holder-8
Please share if you like the idea.
Every wine producer needs to know their temperature during fermentation. There are many small producers (like in our family) without high-end equipment for fermenting the grapes and must. We produce wine for our own use (around 1000 litres) and the technology relies mostly on experience and limited information about the fermentation process. One of the most important paramters is temperature or more specifically, the temperature profile (time dependance), its gradient and maximum value as well. In the past I connected simple I2C sensor to raspberry pi and sent data to mysql database via WiFi connection. It is shame to mention the power consumption of such thermometer.
Recently, I placed LoRaWAN gateway at the top of the vineyard to cover all future need for connecting winegrowing sensors in all neighbouring vineyards. The r.pi thermometer was upgraded to LoRa and I used my own design, the LoRaDunchy module with small LiPo battery, TMP75 as sensor element and small solar cell for supplying the power. Solar power is somehow overkill for this application, but I want to check the real life solar powered sensor. It would be good experience for future sensors which I intend to place in the field for monitoring the microclimatic conditions (and possible prediction of the vine diseases).
Two PCBs from earlier projects were used in this project:
This simple Helical Antenna can be used for most LoRa (and other small wireless device) applications, where space constraints exist. The construction is simple, made from wound solid Ag plated copper wire taken from piece of coaxial cable.
Continue reading ‘Small “rubber-ducky” helical antenna for 868MHz’ »
Small board with arduino nano compatibile pinout with power management and Murata ABZ LoRa module with STM32L0 microcontroller
Continue reading ‘LoraDunchy Arduino Nano pin-compatibile LoRa module with power management’ »