Tag: #arduino

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• What a Robot Arm Is Made Of: Links, Joints, and What Actually Drives Them

  Buy six servos to build a robot arm and it almost always collapses under its own weight. This post starts from the precise definitions of link, joint, and end effector, explains what degrees of freedom actually count and

  2026-08-02 · 29 min read #robotics#hardware#electronics#arduino#math

• The Robot Arm Control Loop: From Trajectory Generation to PID and Gravity Compensation

  Everything past the point where inverse kinematics hands you joint angles belongs to control. This post explains, through discontinuous acceleration, why writing the target angle straight into the servo makes the arm jer

  2026-08-02 · 24 min read #robotics#electronics#arduino#hardware#math

• Ohm's Law for Programmers: Understanding Voltage, Current, and Resistance in Numbers

  An Ohm's law guide for software engineers picking up an Arduino or Raspberry Pi for the first time. It redefines voltage not as a "quantity" but as a difference between two points, and pins down exactly where the water a

  2026-07-31 · 19 min read #electronics#arduino#circuit#hardware#maker

• Driving Motors, Relays, and Inductive Loads: Why You Should Never Power a Motor from GPIO

  A GPIO pin can supply tens of milliamps; a small DC motor demands hundreds. This post works through the accidents that gap causes, one by one. It covers using a separate power supply and why you must tie the grounds toge

  2026-07-31 · 23 min read #electronics#arduino#hardware#maker#iot

• Pull-Up, Pull-Down, and Floating Pins: Why a Single Button Is So Hard to Get Right

  Starts from why an input pin with nothing connected to it randomly flips between 0 and 1. Explains why a floating input behaves like an antenna, how pull-up and pull-down resistors solve that problem, and what the intern

  2026-07-31 · 20 min read #electronics#arduino#raspberry-pi#circuit#hardware

• 3.3V vs 5V and Level Shifting: Why Raspberry Pi GPIO Can't Survive 5V

  Wire a 5V sensor straight into a Raspberry Pi GPIO pin and the pin dies. This post starts from the definition of logic levels to explain exactly why. It covers what the VIH and VIL thresholds mean, why a 3.3V output is u

  2026-07-31 · 20 min read #electronics#raspberry-pi#arduino#hardware#iot

• LED Resistor Calculations Done Right: Why Every Color Needs a Different Value, and the E24 Series

  Starting from a diode's exponential current curve, this explains why an LED must always have a series resistor. It tables forward voltage by color, then works out real resistor values for both 5V and 3.3V supplies. It co

  2026-07-31 · 21 min read #electronics#arduino#circuit#hardware#raspberry-pi

• Embedded Systems & Firmware Development 2026 — STM32, ESP32-C6, RP2040, Raspberry Pi 5, Arduino, PlatformIO, Zephyr RTOS, ESP-IDF Deep Dive

  Embedded development in 2026 is no longer “the world of C and assembly only.” Dual-ISA chips like STM32, ESP32-C6 and RP2350 ship in volume, Zephyr RTOS 4.0 and FreeRTOS 11 have cemented their place as default RTOSes, an

  2026-05-16 · 22 min read #english#embedded#firmware#stm32#esp32

• Complete Embedded Systems & IoT Programming Guide 2025: Firmware, RTOS, Protocols

  Everything about embedded/IoT! Microcontrollers (ESP32/STM32/Arduino), RTOS (FreeRTOS/Zephyr), IoT protocols (MQTT/CoAP/LoRaWAN), sensor interfaces (I2C/SPI/UART), firmware OTA, power management, Edge AI, and security.

  2026-04-14 · 17 min read #embedded#iot#firmware#rtos#freertos

• Embedded Systems & IoT Complete Guide: From MCU to Edge AI

  A comprehensive guide to embedded systems and IoT. Covers MCU programming, RTOS, communication protocols (I2C/SPI/UART/CAN), Raspberry Pi, ESP32, and Edge AI (TFLite/ONNX) with real code examples.

  2026-03-17 · 16 min read #embedded-systems#iot#microcontroller#rtos#arduino

• Electronics for Developers — From Arduino to AI Robotics

  A guide for software developers expanding into the hardware world. From Arduino basics to sensor control, ESP32 IoT, and AI + hardware fusion projects. If you can write code, electronics is easier than you think.

  2026-03-03 · 7 min read #ai#arduino#electronics#embedded#iot

• Seeed Studio XIAO nRF52840 Complete Guide — BLE IoT Projects in Practice

  This post is the BLE and low-power edge-device track in the embedded hands-on series. It focuses on building sensor nodes, wearables, and TinyML experiments with Seeed Studio XIAO nRF52840, while pointing readers to the

  2026-03-02 · 5 min read #ai#xiao#nrf52840#ble#iot

• Complete Guide to Building a Drone & Control System with Arduino + Raspberry Pi

  This post is the hub article in the embedded hands-on series. It covers the full control-system picture around an Arduino + Raspberry Pi drone build, from PID control and sensor fusion to autonomy, and points readers to

  2026-03-02 · 9 min read #ai#arduino#raspberry-pi#drone#pid-control