Using ESPHome's YAML config makes adding sensors and automations to ESP32 smart home projects way easier than wrestling with C++ in Arduino IDE. It also speeds up development, auto-discovers devices, and lets you manage multiple boards from one place.

Discover how to interface the MAX30102 sensor with ESP32 through I2C, then use Arduino IDE code to read heart rate, blood oxygen saturation, and body temperature data easily.

Capacitive reactance determines how much a capacitor opposes AC at a given frequency. This calculator works out the reactance from capacitance and frequency, making it useful when selecting capacitors for filters, coupling circuits or AC signal paths, or when checking how a capacitor will behave at a particular operating frequency.

With ESP Rainmaker, your ESP32 firmware talks to a cloud server and creates app controls automatically, letting you read sensors like DHT22 and toggle LEDs remotely using the free phone app.

You’ll want to check if your ESP32-C3 Super Mini includes built-in flash memory like the FN4 or FH4 models, since some versions don’t have it and need extra parts. This guide shows you how to read product info and spot hidden chipset markings to avoid buying a flashless board by mistake.

Instead of spamming notifications for every sensor blip, use an ESP32 pipeline that detects real events, filters noise, handles Wi-Fi drops, secures credentials, and stores telemetry outside messaging to keep alerts useful and trustworthy.

Using easy-to-carry gear like a tuned AM radio, oscilloscope, and pickup coils, you can track EMI and RFI from devices like switching power supplies and drills. Software-defined radios also help scan a wide frequency range to catch interference early.

The Mactini is a tiny laptop built around a Waveshare RP2350 board, packing display, audio, and input into a 3D-printed case. It uses a 1.69-inch SPI LCD with an ST7789V2 controller and runs all functions through a single button.

Instead of guessing battery specs, this method breaks down how to match your device’s runtime, power draw, size constraints, and peak current demands to create a workable lithium battery design.

This project turns a Raspberry Pi 4 and a 5-inch touchscreen into a cyberdeck, reusing parts like USB and ethernet extensions from an old DFRobot NES. It features a MAX98357A I2S amplifier for built-in audio and custom 3D printed parts to fit everything inside an unusual enclosure.

This project uses an ESP32-S3 and PCM5102 codec to stream digital audio through a cassette player’s read head, while 3D-printed gears replicate tape spool motion to keep mechanical features like auto-stop intact. Missing capstan motion sensing is noted and planned for future improvements.

You can recreate a classic iPod music player using just the MP3-TF-16P module and a few buttons, no microcontroller or programming needed. It handles play, pause, next, previous, volume, and connects to speakers or earphones, all on a simple, low-cost circuit.