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BLOG

Low-Cost, Power Efficient EMG Prosthetic Hand (Part 2)

Creating a low-cost prosthetic arm is challenging, but making one that is also easy to calibrate and accurate is even tougher.

PROJECT

Arduino Wireless Weather Station Using NRF24L01, DHT11-DHT22 Sensor and

By Ron Cutts

Create a dual‑sensor weather station that sends indoor/outdoor temperature & humidity wirelessly via NRF24L01 modules to an Arduino UNO and displays data on an

TUTORIAL

Qwiic Proximity Sensor (VCNL4040) Hookup Guide

By SparkFun Electronics

The Qwiic Proximity Sensor is a simple IR presence and ambient light sensor utilizing the VCNL4040. This sensor is excellent for detecting if something has appeared in front of the sensor; detecting objects qualitatively up to 20cm away.

PROJECT

Arduino Measure TVOC,CO2,Hydrogen,Ethanol,Temperature & Humidity - SGP30

By Ron Cutts

Learn to read TVOC, CO2, hydrogen, ethanol, temperature and humidity from SGP30 and DHT11 sensors on an Arduino UNO. Display data on an OLED using Visuino.

BLOG

10 Smart 3D Printing Tips: Tolerances, Holes, and Slicer Tricks

By Travis Foss

Level up your 3D prints with practical tips on tolerances, press fits, teardrop holes, support-free counterbores, slicer split tools, modifiers, calibration, infill choices, and avoiding common failures like warping and stringing.

BLOG

Star Wars Pomodoro Timer

By Zach Hipps

Turn an ESP32 M5 Core2 into a Star Wars themed Pomodoro timer with dynamic graphics, countdown timer, and focus session control.

PROJECT

DIY Shortwave Propagation Monitor - Measure Ionosphere Conditions

By Mirko Pavleski

Learn how to make a simple device for monitoring the state of the ionosphere and the quality of shortwave signals using the CA3089 chip.

PROJECT

Arduino Display Changing Text on MAX7219 8-digit LED Display Using Seque

By Ron Cutts

Step‑by‑step guide to show changing text on a MAX7219 8‑digit LED display using Visuino and an Arduino UNO. Includes circuit, code generation, and demo video.

TUTORIAL

SparkFun Qwiic RFID-IDXXLA Hookup Guide

By SparkFun Electronics

The Qwiic RFID ID-XXLA is an I2C solution that pairs with the ID-LA modules: ID-3LA, the ID-12LA, or the ID-20LA, and utilizes 125kHz RFID chips. Using the product's interrupt pin, we'll discuss how to get, store, and compare unique RFID IDs.