A wrist-mounted electromagnetic web-shooter powered by an ESP32 and magnetic induction.
This project uses the principle of Electromagnetic Induction — when current flows through a coiled conductor, it generates a magnetic field. That field is used to launch an iron rod which is attached to the thread (the "web") forward at high speed when a trigger button is pressed.
[Initializes all physical comopnents(motor, solenoids and button)] --> [provides current to solenoids one by one with 5 second delay] --> [Iron rod gains tendency to move forward] --> [Motor is turned on to let the projectile to be thrown outside from the device]
| Component | Purpose |
|---|---|
| ESP32 | Brain of the device — handles GPIO trigger and controls the launch sequence |
| Iron Rod | The projectile — launched via electromagnetic force |
| Non-Magnetic Rod | Guide rail — keeps the iron rod aligned during launch |
| Solenoid(coiled wire) | Wound around the barrel — generates the magnetic field when energized |
| Breadboard | Used to attach the button onto it |
| Trigger Button | GPIO input — initiates the launch sequence |
| Cardboard/Box Chassis | Main body housing all components |
| motor axle | Used to un-wind the thread to enable the projectile to move forward (since the length of the thread is the only limit in exiting the device) |
When electric current passes through a solenoid (a coil of wire), it creates a concentrated magnetic field along its axis. A ferromagnetic object (like an iron rod) placed inside the coil experiences a strong attractive force toward the center of the field.
By controlling the duration and timing of the current pulse via the ESP32, the rod is accelerated and ejected — mimicking a railgun-style launch mechanism in a compact, wrist-mounted form.
Written in Arduino-style C++ compiled and flashed via the Arduino IDE with ESP32 board support.
✅ v1 firmware complete — Launch_Sequence.ino
• Concept inspired from electromagnetic induction
• Idea Inspired from the movie: Spiderman: into the Spider Verse