Alexander Innerbichler
Applied electronics student in Vienna.
github.com/AlexanderInnerbichler
V1 Hardware
PCB design complete · parts ordered Dec 2025
MCU
STM32F411VETX · ARM Cortex-M4 · 100 MHz
Memory
512 KB Flash · 128 KB RAM
Main disp
ER-TFTM070-6 · 7" · 1024×600 · RA8876
2nd disp
LCD1602 · 16×2 chars · I²C @ 0x27
Audio
Serial MP3 module · UART @ 9600 baud
Input
4×4 matrix keypad + 4 stop buttons/LEDs
Interfaces
SPI×2 · I²C · USART6 · USB OTG FS
Power
3.3 V · custom PSU · 3V3↔5V level shift
RTOS
FreeRTOS · 4 tasks · 1 kHz tick
Build
C · STM32CubeMX · Makefile
Design
KiCad · 10 schematic modules
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