KEICA - Kit Escolar de Investigación Científico Ambiental is a handheld device used by educators, students and environmental researchers to measure a plethora of enviromental variables on site, such as ambient temperature, soil moisture, water turbidity and harmful gas concentration. My work consisted in designing and manufacturing the PCB's prototypes, then I ordered a large batch of the 2 PCB's needed.

KEICA Sensor Kit. Most cases were 3D printed using recycled PETG as base material. The central unit (white case with orange buttons) has 3 jack female connectors to plug in the different sensors.

First 3D printed functional main case prototype, using an FDM printer machine.

Functional PCB prototype to display the corresponding sensors' data. This was half of my main contribution in this project. This is called the "interface board", and serves to allow the user interaction with the device itself.

The same board as before; this is one of a large batch. Manufactured by JLCPCB and sent to Chile for its assembly.

3D CAD model of the interface PCB with its corresponding electrical/electronic components. This board is controlled by the user by pressing the different buttons present in the circuit.

3D CAD model of the "brain" PCB with its corresponding electrical/electronic components. This board contains an ESP32 - based microcontroller, an SD card and 3 female jack connectors. This board processes the data inputs from every sensor, then sends the corresponding data to the interface board so it can display the different environmental variables in real time.  After modelling these PCB's, I shared the model to the ergonomics and design team so that they could model the main case and proceed to 3D print the prototype for its production.

First two images are the "brain" electronic board and it's schematic (my main task in this project). The rest of the pictures correspond to the different assembly processes and the subsequent implementation in real environments.