STM32-PLC-V1

My first trying to make STM32-based PLC like BARTH STG-800 **Main goals: - Medium-density performance 32 Bit ARM® Cortex® STM32F103C8T6 - 5 Inputs: 3 analog Inputs 0-30 VDC (12 bit ADC) or Digital inputs + 2 Digital inputs (software defined) - 5 Solid-State Power Outputs up to 18A each - Basic Fail Safe Functions - Programmable Status LED - TTL-232 3.3V Interface - Open Source Programming - Wide Operating Voltage Range 7 to 30 VDC - Wide Operating Temp. Range -40 to +70°C 2 layer board top layer is GND, bottom layer is 30V source. Power source and inputs have simple resistor voltage dividers. Outputs based on highside solidstate swithes. **Sources: - Inspiration device - STG-800 https://barth-elektronik.com/en/mini-plc-stg-800.html - Board - STM32F103 «Blue Pill» modified board by r3bers https://easyeda.com/r3bers/STM32F103C8T6- Test-Board - CPU - Medium-density performance line ARM®-based 32-bit MCU with 64 or 128 KB Flash, USB, CAN, 7 timers, 2 ADCs, 9 com. interfaces https://www.st.com/resource/en/datasheet/stm32f103c8.pdf - Outputs - Single-channel high-side driver VN5T006ASP-E with analog current sense for 24 V automotive applications https://www.st.com/resource/en/datasheet/vn5t006asp-e.pdf