Accueil 9 From idea to market 9 Software electronics design office 9 Power / battery and stack management

Power / battery and stack management

According to your specifications and CE standards, our engineers can assist you in the realization of :

Power supply to convert 230v to 24v, 12v or other
Batteries for your portable devices. They can be recharged by USB cable or induction

Most of our applications are equipped with HMI (Human Machine Interface) so that the user can interact with the developed system.

Our skills in electronics allow us to integrate all kinds of Human Machine Interfaces according to your needs.

These interfaces can be of two types :

  • Integrated into the on-board system
  • Remote from the embedded system

The HMIs integrated into the embedded system can be of various forms:

  • Simple HMI: LEDs, push buttons, switches, potentiometers, buzzer…
    Capacitive or resistive touch panel,
  • Flexible membrane keyboard,
  • Touch button,
  • Screen / display (LCD, OLED, E-Ink, …) touch or not

When the HMI is remote, it is developed on a computer. The embedded system is then connected to the computer via a wired or wireless link (USB, Wifi, Ethernet, etc.). The software is developed in C++/C# language using tools such as Visual Studio.

Some examples of screen HMIs developed by the ROSA group.

Depending on the size and type of screen, two types of interface are used, each with its advantages and disadvantages:

With the SPI interface :

OLED monochrome 96×64 driver SSD1327
80×160 colour TFT driver ST7735S
160×128 colour OLED driver SEPS525
E-Paper 128×296 and monochrome OLED 256×64 driver SSD1322
OLED monochrome 128×64 driver SH1106G

With LTDC interface (using TouchGFX) :

320×240 colour TFT
480×272 colour TFT Resistive Touch

Quelques exemples d’IHM “écran” developpés par le groupe ROSA.

Suivant la taille et le type d’écran deux types d’interface sont utilisées avec chacunes ces avantages et ces inconvénients :

Avec l’interface SPI :

  • OLED monochrome 96×64 driver SSD1327
  • TFT couleur 80×160 driver ST7735S
  • OLED couleur 160×128 driver SEPS525
  • E-Paper 128×296 et OLED monochrome 256×64 driver SSD1322
  • OLED monochrome 128×64 driver SH1106G

Avec l’interface LTDC (utilisation de TouchGFX) :

  • TFT couleur 320×240
  • TFT couleur 480×272 Tactile résistif