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amateur radio, maker projects, Arduino libraries discovered from other spots

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Latest Posts

PlantLab: A Complete Open-Source IoT Plant Care Kit for Beginners (Part 1: Hardware & PCB)
A Homemade AZ/EL Antenna Rotator for Ham Radio Satellite Communication Part 2
Building a Battery Meter for Field Radio Operation
AC vs. DC: What Is the Difference and How Can You Tell?

Discoveries

esp-fs-webserver ESP32 web server library feature image showing WiFi manager, browser file editor, OTA updates, and WebSocket support

Esp-fs-Webserver: The Only ESP32 Web Server Library You’ll Ever Need

SmartChamber-3D chamber control system feature image for enclosed 3D printers

SmartChamber-3D: A Partially Open-Source Chamber Control System for Enclosed 3D Printers

Low-power music visualizer clock with reflective display, battery, and DIY electronics parts

A Music Visualizer Clock with Low-Power Consumption

Farm Data Relay System diagram showing ESP32 LoRa sensor nodes, relay gateways, ESP-NOW and LoRa hops across a farm, plus a Raspberry Pi front-end dashboard connected through GPIO UART and MQTT.

FDRS: Send ESP32 IoT Data Without WiFi (Ideal for Remote Farms & Fields)

DIY PID-controlled filament dryer dry box with open lid, foil insulation, orange PI heater plate, OLED display, red and green status LEDs, and PID temperature history chart.

Build a Filament Dryer with PID Control for FDM 3D Printing

TasmoCompiler feature graphic showing ESP32 and ESP8266 boards, a five-click firmware workflow, browser-based Tasmota compile screens, Docker setup commands, and a ready-to-flash firmware.bin file.

TasmoCompiler: Build Custom Tasmota Firmware for ESP32/ESP8266 Without Compile Hassle

ESPUI: No HTML web UI for ESP32/ESP8266, real-time control panel with WebSocket

No HTML, No Headaches: Build a Clean Web UI for ESP32/ESP8266 with ESPUI

MPY Cassette Player V4: A Retro Cassette Player Reborn with RP2040 & MicroPython

MPY Cassette Player V4: A Retro Cassette Player Reborn with RP2040 & MicroPython

JingShi Desktop Clock: Stylish ESP32-powered smart timepiece with OLED display, featuring article title overlay "A Stylish ESP32-Powered Timepiece with Smart Features for Makers"

JingShi Desktop Clock: A Stylish ESP32-Powered Timepiece with Smart Features for Makers

Amateur Radio

Homemade AZ/EL antenna rotator with gray controller enclosure, aluminum arm, yellow 3D printed bracket, Yagi antenna, tripod mount, water bottle counterweight, and an ICOM IC-705-style radio on the table in a portable ham radio satellite setup.

A Homemade AZ/EL Antenna Rotator for Ham Radio Satellite Communication Part 2

Homemade AZ/EL antenna rotator with U5V3 cross yagi for ham radio satellite communication

Homemade AZ/EL Antenna Rotator for Ham Radio Satellites, Part 1: Hardware Build

Feature image showing a snowy high-altitude radio station with a 70 cm Yagi antenna, distant terrain, and the title How Far Can a 1000-Meter-High UV Band Antenna Communicate?

How Far Can a 1000-Meter-High UV Band Antenna Communicate?

diy current choke balun 3d printed housing feature image

A Current Choke Balun with a 3D Printed Housing

ground-elevated-vertical-improved-5.6m-whip

A Ground-Elevated Vertical Based on 5.6m Whip — Improved

2m full-wave loop feature image

A 50-ohm Full-Wave Loop for 2m Band

cw skimmer server hermeslite2

Setting Up a CW Skimmer Server by a Hermes-Lite2 SDR

digiPi aprs unit digiPi HAT all-in one box

A digiPi APRS Unit Based on a digiPi HAT

full view of the deployed antenna on a mountain top

A Ground-Elevated 5.6m Whip Vertical Antenna: Build Guide

Hobby Electronics

PlantLab open-source IoT plant care kit feature image with the final controller build

PlantLab: A Complete Open-Source IoT Plant Care Kit for Beginners (Part 1: Hardware & PCB)

Feature image with the title "Building a Battery Meter for Field Radio Operation" over a realistic workbench scene showing a yellow battery meter and a 4S LiFePO4 battery pack.

Building a Battery Meter for Field Radio Operation

Simple comparison of a steady DC line and an alternating AC sine wave.

AC vs. DC: What Is the Difference and How Can You Tell?

Simple circuit diagram identifying voltage, current, and resistance.

Voltage, Current, and Resistance Explained with a Water-Pipe Analogy

Feature image showing a rooftop LoRa Meshtastic base station with a homemade PVC J-Pole antenna and solar panel

Build a J-Pole Antenna for Your LoRa Meshtastic Base Station

an illustration showing pcb trace, with blue circles representing current and red circles representing static charge

Electric Charge, Static Charge & Current

Illustration of glowing blue electrons moving through a circuit board with the title "Electronics Basics 01: What Is an Electron?"

What Is an Electron? From Atomic Structure to Electron Flow

a solar meshtastic CLIENT_BASE Station deployed on balcony rail

Lora Meshtastic Nodes Built from Scratch Part 2

meshtastic node esp32 custom board feature image

Lora Meshtastic Nodes Built from Scratch Part 1

desktop charger 260w two type-c ports

A 260W Multi-Port Desktop Quick-Charge Unit

esp32 mppt controller in work closed-up view

An Open Source MPPT Controller for Ham Radio Field Operation – Build Notes

Online Tools

Illustration of a ham radio SWR meter, coax cable, and forward and reflected power arrows for return loss calculation

SWR & Return Loss Calculator

Resistor series and parallel calculator showing series and parallel resistor diagrams with an equivalent resistance result.

Resistor Series / Parallel Calculator

Ohm's law calculator feature image with a multimeter, simple circuit, and V equals I times R formula.

Ohm’s Law Calculator

LED resistor calculator showing a red LED, current limiting resistor, circuit diagram, and resistor value readout.

LED Resistor Calculator

Coiled copper wire beside an antenna analyzer with the title Antenna Length Calculator

Antenna Length Calculator

Voltage divider calculator showing two series resistors, Vin and Vout labels, and a calculation display.

Voltage Divider Calculator

Resistor color code calculator with a banded resistor, multimeter, and resistance value display.

Resistor Color Code Calculator

Coiled coaxial cable beside an antenna analyzer with the title Coax Electrical Length Calculator

Coax Electrical Length Calculator

Coiled black coaxial cable with a silver connector on a clean gray surface

Coax Loss Calculator

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