Airsoft Dummy Bomb - Dynamite Version (uses XY-LJ02)

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Here is a fun little gameplay prop that can be used in Airsoft game days. Its a Fake/Dummy Dynamite "bomb". The design uses an XY-LJ02 board which is readily available from retailers such as Amazon, Banggood, etc. a 9V buzzer and a 9V PP3 type battery (you will also need some wiring to connect it all together of course) You can program the XY-LJ02 to count down a user defined number of minutes, when time runs out it triggers a relay and sets the buzzer off (simulating the device 'detonating') This can be a fun addition to an Airsoft game day where a team has the objective to "find and defuse" the device before the timer runs out. Note the wiring diagram, once programmed correctly (you will probably want to use program P4) you turn the unit on, press the push button to start the countdown, and to 'defuse' the device simply turn it off The 14 'wires' that run from the timer to the 'detonators' can be anything you like, actual wire, or PLA filament or even shoelaces also work well, just glue them in place into the 3mm holes You will need a few screws to assemble, these are: 8x M3x10 Countersunk screws 4x M3x5 Screws 2x M2x5 Screws I have also included a full STEP file assembly if you would like to make your own modifications