name: Electropolishing category: electronics short: In this research project we decided to test different electrolytes for optimal electropolishing. photo: https://digiem.si/wp-content/uploads/2026/03/elektropoliranje.jpg name: Smart LED lights with a touch display category: electronics short: Smart LED lights with a touch display that controlls each LED individually. We can controll brightness and even make patterns with these LED lights. description: As a task, we set ourselves the task of making 42 controlled LED lights that are mounted in the ceiling and are adjustable via an LCD touch display that we made ourselves. Each LED light has its own address and can be individually turned on and off and the power can be adjusted. The basic idea was simple, namely to make plastic built-in housings for smart LED lights, electronics for them and an LCD touch display that will control the LED lights. The first problem arose when making the housing for the electronics, where we discovered a new area and a new challenge for us, namely making a mold and making housings from potting resins. The second problem arose when communicating with the LED lights via USART communication, as we had to lower the communication speed very low due to the use of a regular cable. In the task, we learned about making molds and making housings from potting resins (polymer mass), the process of industrial manufacturing of printed circuits and electronics with microcontrollers, and programming microcontrollers. The practical product was a great success with a lot of effort and we came to a lot of new insights. This is valuable knowledge that will be useful for future projects. Smart LED lights are an innovative proposition because compared to other products on the market, we are very competitive in price and easy to manufacture. photo: https://digiem.si/wp-content/uploads/2025/07/Slika11-e1753992064541.jpg name: Piezo Element as a Sensor category: electronics short: Research project exploring use of piezo elements in a different way. description: In this research assignment, we will learn about the piezo element. We will follow the following research procedure, first we will investigate what a piezo element is, why it is used and how it works. Then we will try to make a speaker with it and then a sensor. Our hypothesis is that the sensor can be made, but it will be quite challenging. First, we will start by learning about piezo elements, then we will try to make a sensor with them that will be competitive with those already on the market, and finally we will try to make a sensor panel using the piezo sensors that we will make. photo: https://digiem.si/wp-content/uploads/2025/07/Slika10.jpg name: Thermoforming Plastic category: electronics-mechanics short: Custom thermoformed plastic parts and moulds that cut production time and cost. description: In this research paper, we would like to explore the field of plastic transformation using temperature treatment. First, we will explore what plastic thermoforming is and how it works, then we will look at existing machines on the market that are used for these purposes. Finally, we will try to make our own plastic thermoforming machine, which is also called a plastic vacuum forming machine, as it works using a strong vacuum. photo: https://digiem.si/wp-content/uploads/2025/07/Slika12.jpg name: Animation Wheel for Kids category: electronics-mechanics short: A recreation of a very old toy that used rotating discs to make short animations. description: In this research paper, we are investigating a very old device for which in Slovenian we find the term phenakistoscope. In English, this device is called a "Phenakistoscope", which is a very simple device because it only contains a rotating wheel that is divided into several parts. In each part, a picture is drawn, these pictures follow one after the other and each is slightly changed. For example, pictures are drawn one after the other of how a character walks. If we spin this wheel, we get the feeling that the figure is really moving. In the paper, we present how to update the "Phenakistoscope" and make such a modern device for children, for smaller ones as an interesting thing, and for slightly older ones to explain how our eyes work. We will graphically process our rotating wheel, install it on an axis that will be driven by an electric motor, which is controlled by electronics with several functions. photo: https://digiem.si/wp-content/uploads/2025/07/Slika4-e1753884125452.jpg name: Automatic hood using a steam sensor category: electronics short: Kitchen hood controller that automatically activates when steam is detected. description: In the innovation proposal, we focus on the problem of kitchen hoods, which have several levels of suction fan power, but unfortunately without any sensors. Our innovation proposal is to make a kitchen hood or convert an existing one to automatic operation. Automatic operation is understood to mean detecting steam using a steam sensor, and regulating the fan using a microcontroller. The regulation would work automatically, or based on the user's set parameters. We want to solve the problem of steam when cooking, because we often forget to turn on the hood or it is at too low a speed. If we remove the lid, the steam spreads throughout the kitchen, if we have not previously turned on a higher suction power. Also, when we cook, both hands are busy and we cannot immediately turn on the hood at a higher power. In this innovation proposal, we will solve this problem. photo: https://digiem.si/wp-content/uploads/2025/07/Slika9.jpg name: Maths and Robotics category: electronics short: A reasearch project connecting and showing how maths connects to robotics. photo: https://digiem.si/wp-content/uploads/2026/03/robotika.jpg name: Steam sensor category: electronics short: Industrial steam detection module with 4-20mA output for process monitoring. description: In the research project, we set out to research and then make a steam sensor. This will not be a humidity sensor, as one might quickly think. We would like to make a steam sensor for water, oil or similar liquids. On the way to the stated goal, we investigated how steam behaves at room temperature and when it evaporates, and how to detect when there is more or less of this steam. At first, we researched and made a steam sensor that has only two states, namely whether there is steam or not. Then we tackled even more difficult matters, namely detecting how much steam there is, namely whether it is very high or low. In the project, we demonstrated the development and manufacture of a steam sensor that provides a voltage, for example, from 0V to 10V or from 4mA to 20mA, or a digital output via the CAN serial bus, for example, from 0% to 100%. Of course, a steam sensor is an electronic circuit, the main part of which is a microcontroller, and the sensors connected to it. photo: https://digiem.si/wp-content/uploads/2025/07/Slika9.jpg -------------------------------------------------------