Advanced Airsoft Bomb Guide

In this advanced airsoft bomb guide, I’m creating a more advanced airsoft bomb defusal device, inspired by my earlier bomb vest project and typical code-based bombs. The goal is to design a device with multiple stages, using a combination of wire sequences and code input to deactivate it.

Materials
  • ABS Toolbox
  • 2x ABS junction boxes
  • 1x ABS sheet
  • Aluminium Rods
  • M2, M3, & M4 nuts and bolts
Electronics
  • Arduino Mega 2560 Rev3
  • Wire (12 colours and at least 50cm of each)
  • 3x Printed Circuit Boards
  • Various resistors from 220 to 10K Ω
  • 2x 18650 Batteries
  • 1x 11.1v LiPo battery
  • Various wire terminals
  • Fuses & Fuse holders
  • Buttons
  • Keypad
  • 7 Segment Display
  • OLED display
  • Power key switch
  • 18x LED’s
Tools Used
  • Electric Jigsaw
  • Impact Driver
  • Stanley Knife
  • Dremel
  • Soldering Iron
  • Wire Cutters & Crimps
  • Pliers
  • Tweezers
  • Screwdrivers
  • Files
Time Taken

18 Hours Programming

12 Hours Construction (so far)

Device GoalTo set a timer and have certain wire sequences and fuse changes to deactivate it with a secondary timer for stage 2 to enter a passcode.
Cost¥32,000 plus time to make

Stage 1: Planning & Designing an Airsoft Bomb

Image of programming the software to be used for the advanced airsoft bomb

The initial step in creating this advanced airsoft bomb involved developing the code. Without a solid code foundation, the device design would have lacked clear direction. The code established essential aspects, such as the number of pins on the main board, wiring layout, and other necessary components. For this setup, handling a defusal sequence with 12 wires, two displays, a keypad, buttons, LEDs, a relay, and a tamper-proof system required a total of 55 connections—50 grounds and 5 for 5V—amounting to 110 wire connections overall.

Given this complexity, a standard Arduino wouldn’t suffice, so I opted for the Arduino Mega. After approximately 15 hours of programming, testing, and debugging, the code was running smoothly.

With the components set, the next step was planning the layout within an ABS toolbox, designed to make defusal more challenging. Instead of just disconnecting wires or entering a code, players would need tools like screwdrivers and pliers to access certain sections. Furthermore, some parts required unscrewing to reveal the final defusal elements.

Stage 2: Building the Bomb

Construction kicked off by cutting 3mm-thick ABS sheets. Initially, I tried scoring and snapping, but it wasn’t efficient. Therefore, I switched to an electric jigsaw with a fine-tooth blade, which sped up the process, enabling me to cut holes for screens, buttons, and wiring in about an hour.

After that, I cut aluminum rods to create guide rails for hidden wiring, batteries, and control systems. With the junction boxes in place, I mounted the Arduino Mega and installed the printed circuit boards.

Basic design with primary wires installed
Base design with more to add and a lot under the cover to come

Organizing the Wiring

Managing over 100 wires required a highly organized, modular setup for easy maintenance. This modular approach allows components to be added or removed seamlessly and hides specific parts, encouraging players to explore during gameplay.

Currently, about a quarter of the wiring is complete, with fuses, buttons, and the display installed. The next phase will involve carefully routing the remaining wires to prevent confusion with removable parts, ensuring all connections are accessible for troubleshooting.

The device is still a work in progress, but it’s coming together nicely. I’ll keep refining and updating the design. Stay tuned for more updates on the advanced airsoft bomb guide.

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