VoltVerse is a free, open-source hub of hands-on IoT and electronics project guides for university students. Each of its 15 guides (smart agriculture, home automation, weather station, patient health monitor, smart door lock, RFID attendance, vehicle tracker, smart energy meter, gas and fire alert, ESP32-CAM security and more) covers one build end to end in the same seven sections: Basic to Advanced versions to choose from, a priced bill of materials, pin-by-pin wiring maps, ordered build steps with progress tracking, a live logic simulator, Arduino sketches and datasheets, plus presentation tips. Picking a board (Arduino Uno, ESP32, NodeMCU or ESP32-CAM) and a version updates the parts, wiring, steps and code, and the site explains when a board is not suitable for a build. An interactive 3D bench built with three.js shows the board, sensors and wiring, and can animate current flow. All 71 Arduino sketches are compile-verified with arduino-cli, and a pairing check keeps every sketch matched to its board and version. Guides can be saved, progress is remembered on the device, and any guide prints to PDF. It is a static React site with no backend or account. MIT licensed.