Expertise

At DEV Joni, we pride ourselves on offering a diverse range of capabilities and specialised skills across several key areas. Here is an overview of our core expertise.

1. Software Development

We specialise in rapid software prototyping and development, primarly using Python for small-scale applications.

2. Parts Manufacturing

Our in-house 3D-printing facility allows for fast prototyping and on-demand manufacturing. Adhering to our open-source philosophy, we use Prusa Research printers (7 Mini and 1 MK3S), which are known for their precision and reliability.

We focus on PET-G plastic due to its superior mechanical properties, recyclability and safety.

Printing Capabilities

• Materials: PLA, PETG, ASA, ABS, PC, CPE, PVA/BVOH, PVB, HIPS, PP, Flex, nGen, Nylon, Woodfill
• Temperatures: Up to 280°C
• Build volume: 18x18x18 cm³ (larger parts can be printed in sections)
• Accuracy of +-0.5 mm (typically closer to ±0.2 mm)

Additionally, we use casting techniques for custom parts, such as clear epoxy resin lenses for light focusing, and we have basic capabilities for metal, plastic, and wood working, such as polished first-surface mirrors.

3. Electronics Development

We design and build simple electrical circuits and devices that can interact with sensors (e.g. temperature, buttons, cameras) or control actions (e.g. LEDs, valves, motors). We specialise in extra-low voltage devices (under 75V DC or 50V AC) due to legal restrictions,

4. CAD & 3D Modelling

• Technical Modelling: OpenSCAD
• Artistic Mdelling & Animation: Blender
• Ray-traced Rendering: High-quality, photo-realistic output

A recent project, Insect Inspired Stereo Vision, showcases our capability in scientific visualisation and public engagement, which can be viewed here.

5. Scientific Expertise

• Electrophysiological techniques
  • Intracellular recordings
  • Electroretinograms (ERGs)
• Data Analysis, Modelling and Simulations
• Experimental Setup Design

Dr. Joni Kemppainen has received extensive training in world-class electrophysiology labs in both the UK and Finland. With a strong background in physics, he excels at integrating theoretical knowledge with practical equipment to build functional experimental setups.

Updated 13th February 2025