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Close-up of the assembled P161002 board with Microchip devices in SMD packages Board visualisation with an STM32 microcontroller, SD card socket and GPS module Three-dimensional visualisation of a board with a relay, buzzer and connectors Part of a schematic with an INA326 instrumentation amplifier and MCP3304 A/D converter Three-dimensional visualisation of a densely populated communication module board Device front panel with labelled buttons, volume knobs and a speaker Technical drawing of the front panel showing the layout of buttons and knobs Assembled board with a PIC18F2550 microcontroller, USB socket and trimmer potentiometers TouchGFX interface source code for STM32 in the Visual Studio Code editor Printed circuit board layout with copper layers and component placement
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24 x 24 LED display
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Arduino - 24x24 LED display

The project was a need of the moment. In its final form it will be built around a different processor. Arduino was used here as a rapid prototyping method.

24x24 LED matrix built from nine 8x8 modules, showing medical parameters

Fig. Medical parameters

The project uses a display made by Shenzhen LC Technology, roughly 10 cm x 10 cm in size. The matrix holds 24x24 LEDs grouped into nine panels of 8x8 LEDs each. Every panel carries a MAX7219 driver. The data to be displayed is sent over an RS232 serial interface. In this case the values shown are SPO2 and HR, that is medical parameters.

This display was eventually moved to a different processor - going from an Arduino prototype to a custom board with a PIC or STM32 microcontroller is exactly the kind of work covered by our design offer.


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