Electronics engineering blog covering embedded systems, PCB design, RF communications, and semiconductor physics.https://solderbit.org/https://solderbit.org/blog/freertos-tm4c123-tasks-queues-semaphores/https://solderbit.org/blog/freertos-tm4c123-tasks-queues-semaphores/A practical guide to running FreeRTOS on the TM4C123 microcontroller. Covers task creation, queues for inter-task communication, and semaphores for synchronization.Thu, 11 Jun 2026 00:00:00 GMThttps://solderbit.org/blog/kicad-esp12f-pcb-design-walkthrough/https://solderbit.org/blog/kicad-esp12f-pcb-design-walkthrough/Step by step guide to designing a custom PCB for the ESP-12F WiFi module in KiCad. Covers schematic, footprint, layout, and common mistakes.Fri, 12 Jun 2026 00:00:00 GMThttps://solderbit.org/blog/max30102-port-arduino-to-tivaware-c/https://solderbit.org/blog/max30102-port-arduino-to-tivaware-c/How to port the MAX30102 pulse oximeter and heart rate sensor from Arduino to TivaWare C on the TM4C123. Covers I2C communication, register setup, and BPM calculation.Thu, 11 Jun 2026 00:00:00 GMThttps://solderbit.org/blog/pid-control-self-balancing-robot/https://solderbit.org/blog/pid-control-self-balancing-robot/A practical explanation of PID control using a self-balancing robot as the example. Covers proportional, integral, and derivative terms with real tuning experience.Fri, 12 Jun 2026 00:00:00 GMThttps://solderbit.org/blog/ra01-sx1278-lora-getting-started/https://solderbit.org/blog/ra01-sx1278-lora-getting-started/A practical guide to using the Ra-01 SX1278 LoRa module. Covers wiring, common mistakes, library setup, and real range tips from actual builds.Thu, 11 Jun 2026 00:00:00 GMThttps://solderbit.org/blog/tm4c123-usb-not-recognized-fix/https://solderbit.org/blog/tm4c123-usb-not-recognized-fix/Your TM4C123 suddenly disappears from Device Manager with no obvious cause. Here is the exact fix using LM Flash Programmer to update the ICDI firmware.Thu, 11 Jun 2026 00:00:00 GMT