We developed a general purpose MCU card for a client
We also do design of embedded hardware and software, like this STM32 processor card.
The design features:
Eight isolated PWM outputs 15V /1.5A.
Four RS485 ports.
SPi ports.
I2C ports.
Analogue inputs.
Digital I/O.
Dedicated test port via DB15 that interfaces to a LCD and keyboard. Used for factory debugging. It interfaces to a LCD and keyboard that is operated from the on-board MCU to provide testing information during development and production.