Link to the instructable : https://www.instructables.com/id/CarassusIoTelectronicproject/
Hello everyone, thanks for watching our last video.
As a reminder, the project we developed uses a raspberry that communicates with an Arduino. The rest left was left our creativity, so we decided to create an automated pond : the Carassus project.
Carassus feeds automatically your fish two times per day and activates your pump when it is needed. Users don’t need to set nor control it manually anymore, the pond is automatically and remotely controlled. Carassus is saving time and energy for the pond’s owner.
Carassus delivers a specific amount of food when the temperature is above 5°C.
The pond feeds the fish two times per day : in the morning at 7.30 am and in the evening 18.30pm.
Carassus does not filter the water neither overnight nor the daytime temperature is below 5°C. So the filter pump is activated if both of the temperature and brightness conditions are met. In fact ,our system Carassus take care of the water filtration system during winter by switching off the pond’s pump. This system is going to save energy and time for the pond’s owner.
1. Mechanical part
First of all, we built the protoype of carassus with reclaimed materials. At first, we built the framework of Carassus with reclaimed wood. An empty cut 5 liters plastic bottle is used as a fish food container. At first we wanted to use a 3D printed worm screw controlled by a stepper motor to drop the fish food in the pond. This system had to be changed because the stepper motor hadn’t enough power to move the worm screw with the fish food on the top. In the new system, the end of the tube is blocked with a valve controlled with a servomotor. A PVC tube is assembled to the empty bottle.
2. Electrical box
The electrical box is assembled to the wooden frame. It is a recycled electrical box and that’s why it is way too big for what it contains. Let’s take a look inside. Every cable from the pump circuit are connected to the electric circuit breaker to protect it and to the electrical terminal. The electrical contactor 5V is connected to the raspberry and is used to control the pump. Raspberry is powered via a socket and is connected to the arduino. The arduino is connected is connected to the bread board and all the different sensors. The breadboard is powered in 5V by the arduino and it contains the photocell, the temperature compensator and the RTC.
Here is the pump working in a beautiful pond during the day with a temperature around 24°C. As a demonstration : the pump is working because the light and temperature conditions are met. Let’s cancel one of the two conditions. We put the temperature probe in a bowl full of ice. The temperature measured by the probe is decreasing and when the temperature is below 5°C the pump stops. At first, the pump is working. When the pump stops, we take the temperature probe in our hands to heat it. When the temperature is above 5°C, the pump restart. Now, we want to cancel the light conditions. We put our finger in front of the sensor and the pump stops again. When we remove our finger, the system restart again.
As we can see, when it’s time and the light and temperature conditions are met, the valve is opened via the servomotor.
When we write the raspberry’s ip address in a internet browser, we can see a chart displaying the temperature and light data. The raspberry collects the data in the arduino and create the chart.
Let’s now make a list of the potential improvements that we can make. As we said, we changed the 3D printed worm screw controlled by a stepper motor for a valve controlled by a servomotor. Unfortunately the system is blocked when there is too much food above it. As a first improvement we could put the initial system back with a more powerful stepper motor that is not blocked by the quantity of fish food above it. After that we could replace the recycled materials by a good looking new framework made of metal, a proper fish food container, a electrical box adapted to our needs and a bigger breadboard.
Thank you for watching our videos and following us through this project.