https://electwork.net/en/tags/arduino/ Recent content in Arduino on Electronics Lifehack! https://electwork.net/images/ogp-default.jpg?v=3 https://electwork.net/images/ogp-default.jpg?v=3 Hugo -- gohugo.io en Mon, 20 Jul 2026 00:00:00 +0900 https://electwork.net/en/posts/i2c-spi-uart-comparison/ Mon, 20 Jul 2026 00:00:00 +0900 https://electwork.net/en/posts/i2c-spi-uart-comparison/ How I2C, SPI and UART differ, compared by signal count, speed, multi-device support and wiring distance. Covers pull-up sizing, SPI modes 0-3 and baud rate, with a decision flow for Arduino, ESP32 and STM32. https://electwork.net/en/posts/arduino-74hc595-led-board/ Wed, 11 Feb 2026 00:00:00 +0900 https://electwork.net/en/posts/arduino-74hc595-led-board/ Using the 74HC595 shift register with Arduino, for beginners: pin wiring (SER/SRCLK/RCLK), shiftOut() sample code, and cascading for unlimited expansion. Includes schematics, KiCad data, and hardware SPI. https://electwork.net/en/posts/arduino-software-pwm-wave/ Thu, 22 Jan 2026 00:00:00 +0900 https://electwork.net/en/posts/arduino-software-pwm-wave/ Implementing Software PWM on the Arduino UNO R4: give every digital pin — not just the six hardware PWM pins — smooth brightness control. Covers gamma correction, wave phase math, and flicker-free 3.9 kHz PWM. https://electwork.net/en/posts/arduino-ir-remote-receive/ Thu, 23 Jul 2020 00:00:00 +0900 https://electwork.net/en/posts/arduino-ir-remote-receive/ Receive and decode infrared remote signals with Arduino and the IRremote library, then control LEDs. Covers reading NEC/SONY protocol hex codes, mapping buttons to functions, and step-by-step dimming. https://electwork.net/en/posts/arduino-rgb-led-control/ Mon, 13 Jul 2020 00:00:00 +0900 https://electwork.net/en/posts/arduino-rgb-led-control/ Control a common-cathode RGB LED with Arduino PWM: 8-color digitalWrite() basics, per-channel resistor calculation, and smooth 16,777,216-color gradients using sin() phase control. Includes R4 12-bit PWM. https://electwork.net/en/posts/arduino-adc-serial/ Sun, 12 Jul 2020 00:00:00 +0900 https://electwork.net/en/posts/arduino-adc-serial/ Analog-to-digital conversion on Arduino explained: 10-bit resolution (4.88 mV/step) vs the R4's 14-bit mode (0.305 mV/step), the ADC-to-volts formula, and how a SAR ADC works. Sample code for R3 and R4. https://electwork.net/en/posts/arduino-buzzer-sound/ Sat, 27 Jun 2020 00:00:00 +0900 https://electwork.net/en/posts/arduino-buzzer-sound/ Hands-on Arduino tone() guide: wire a passive piezo buzzer and play real notes from a three-octave table. Full sketch, the active vs passive test, and no-sound fixes. Works on UNO R3 and R4. https://electwork.net/en/posts/led-ohms-law/ Mon, 15 Jun 2020 00:00:00 +0900 https://electwork.net/en/posts/led-ohms-law/ A beginner's guide to lighting LEDs with Arduino: apply Ohm's Law to pick the right current-limiting resistor, wire a breadboard circuit step by step, and troubleshoot common issues. Covers polarity and Vf.