i2c pullup hardware
I2C Pull-up Resistor Selection: The Complete Guide
Why I2C pull-up resistors matter, how to calculate the valid range, and the most common mistakes that cause intermittent I2C failures on real hardware.
Blog
Register-level explanations, timing gotchas, and field-tested patterns for embedded systems.
uart stm32 avr
Why Your UART Isn't Working: Baud Rate Errors Explained
The most common cause of UART garbage data is a miscalculated baud rate. Here's exactly what goes wrong, why 2% matters, and how to debug it fast.