Make an automatic fish feeder with light using Arduino via instructables
As a student I wanted something to flourish up my room. A small fish tank seemed perfect. But since I’m always away for the weekend or even longer periods during summer holidays, I wouldn’t be able to feed the fish, and they probably won’t like that so much. So I had to come up with a solution. When I had some spare time, I started brainstorming about some way to automate the feeding and keep it as compact as possible.
On the Internet, there are many ways to make an automatic feeder, but all I found were messy solutions with mostly servo motors. These feeders are big and it’s hard to set the right quantity of food.
I designed a screw that’s 3d-printable in Inventor. With this screw (driven by a stepper) I “extrude” the food through a tube from the reservoir to the drop zone. I can set the feed duration in seconds, which gives me an exact same food quantity every single time.
IMPORTANT NOTE: I tried it with several types of food. Flakes tend to jam the screw. The fish granulate works best.
An RTC module keeps track of time and a stepper driver gets his commands from an on-board Arduino Nano. I also added two small led panels (white and blue), brightness can be set with two separate potentiometers. Here is how I made it.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.