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Welcome to the latest edition of the VoltJots newsletter, linking you to the very best electronics and IoT news, products, and projects.

Hope you enjoy! Until next week,

VoltJots

Set up your ESP32-CAM to snap photos and email them instantly, with clear steps on wiring, coding, and configuring everything for real-time alerts.

Check out these freely accessible websites for some solid electronics foundations.

Use a QT Py ESP32-S3 running WipperSnapper and Adafruit IO to create a frost alert that glows blue and texts you if freezing weather is forecast overnight.

This project walks you through making a DDS sine wave generator using an Arduino Uno Q, showing how to digitally produce analogue waveforms and verify the output with a speaker.

This tutorial walks you through creating the MiniKame robot, explaining its design, assembling hardware, analysing principles, and programming an Arduino-based 8-DOF desktop quadruped.

Meet the ESP-FLY, a miniature quadcopter DIY kit featuring the XIAO ESP32-S3 board. Its tiny 67x67x31mm frame fits in your pocket, and is designed for indoor flying, STEM education, and hobbyists who want a tiny, pocketable drone to build and fly.

This project builds and tests a basic audio amplifier around the 8002A IC, designed for low-power portable devices and capable of 2W output into 4Ω at 5V supply.

Build a smart RGB thermometer that uses LEDs to display temperature levels and trigger fans or other appliances automatically.

Instead of adding bulky sensors, digid’s nano-sensors print right onto materials like glass and metal, enabling heat, pressure, and stress detection built straight into the object.

A comprehensive tutorial outlining how different designs, such as full-wave and bridge rectifiers, shape the output for various electronic applications.

This guide walks you through creating a lightweight AI model using handwritten digit data, then exporting and compiling it to run on a DEEPX-powered edge device. You’ll also build a simple app to test your model right on the hardware.

This article explains how to find obsolete or discontinued ICs for repairing or building vintage electronics, covering trusted sourcing options, counterfeit warning signs, testing methods, and substitute parts when originals are no longer available.

Follow along with this project that created a compact Raspberry Pi 4 system with a 7-inch HDMI touch display, integrated audio, and a rechargeable battery pack for use anywhere. The design incorporates a voltmeter, cooling fan, and custom PCB to deliver reliable performance for internet browsing, terminal commands, and sensor connections.

Easily upload and serve an html-based dashboard for free using Firebase Hosting, making it straightforward to share IoT panels, portfolios, or mobile web apps online.

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