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C4-like time bomb

Overview

The C4-like time bomb
consists of:
1. A countdown timer based on a 51 microcontroller.
2. A three-battery casing connected via a Type-C cable.
3. The casing, made with a cardboard tube, is shaped like a C4 bomb.
4. Multiple colored wires are used to achieve a realistic appearance.
The principle is
based on a 51 microcontroller countdown timer, which, combined with a buzzer, creates a countdown explosion sound to achieve the desired effect.

The image above shows the completed PCB board with all components soldered. A final product image, including

the three-battery casing, is shown. Video and code are attached.

Design Files

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Update:2026-03-26 13:32:33

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