If you have seen airsoft Claymore mines, you’ll know that they usually have a double mousetrap mechanism inside. Basically, the energy that propels the BBs is stored as tension in the springs. This is a simple mechanism that doesn’t require gas canisters. Throwable grenades, on the other hand, use gas canisters as the propelling agent.
While researching for one of my old projects, the electronic grenade (Part 1 & Part 2), I experimented with a very different design. Instead of 3D printing the enclosure, I tried 3D printing a negative and molding the enclosure with liquid rubber. To be exact, it was a pair of liquids that hardened when combined.
Let’s get started on the second part of the sound grenade build, this part focusing on soldering, programming and assembling the electronics into the enclosure. For instructions on how to make the 3D-printed enclosure, check out Sound grenade for Airsoft [Part 1: Enclosure]. I decided to use an ATtiny85 microcontroller and the Arduino environment because
Commercial airsoft grenades have to be refilled with CO2 capsules every time they are used. This sound grenade aims to be more economical since it can be used hundreds of times on a single coin cell charge, although you will lose the realistic loud bang and the ability to throw BBs. It consists of a