bomb_propV2.wmv

Updated V2.
Change log:
-Fixed low volume buzzer
-timer now correctly removes 15 seconds when less than 15 is left on the countdown.
-Tether has been beefed up to prevent tampering
-more reliable solid state relay for buzzer.
- now uses an atmega168 without the Arduino.

How it Works:
The bomb must be attached to the tether (which is locked to a tree or other immobile object) before it can be armed, this ensures that the bomb can only be armed in the designated area. If the tether is removed at any time while the bomb is on, it will detonate. It can only be turned on and off with an electronic key switch, I have 2 keys, one for each team leader/ref. To arm the bomb a 7 digit code must be entered. This starts a countdown. The countdown can be interrupted at any point by pressing the disarm button, when the button is pressed the user is asked for the disarm code, this is a separate 7 digit code from the arm code. After the disarm button is pressed, the bomb will wait 15 seconds for a code to be entered, if the code is correct, the countdown will end and the LCD will display "Bomb Disarmed". If the code is incorrect no message will be displayed, press the reset key ( the "*" key) and try again. If no code is entered after 15 seconds, the counter will restart and 15 seconds will be subtracted from the time left. When the countdown reaches 0, a buzzer is sounded and the LCD will display "Have A Nice Day". It sounds more complicated than it is, just watch the video.

Variables: - can be changed at any time.
Countdown time 0hr:2min:30sec
Arm code: 7355608
Disarm code: 1234567

The Bomb can be powered by a normal 9v battery, or a 12v 1.6A/hr battery. Right now I have it attached to a small buzzer, but it has more than enough battery capacity to run a siren, strobe, radio, electric detonator, servo, or just about anything that would be useful to alert people when the bomb is detonated.

Category:

Entertainment

Tags:

• bomb
• propV2

[JSMXBOX]

this is very cool mate, do you have the schematics and AVR Hex files for this?

Cheers jsm!

[theonlywizdum]

@JSMXBOX This is the old version. I use an Arduino, so no HEX files, but if you have an AVR programmer then you can flash the Arduino bootloader and code onto a regular Atmega 168. The current code and wiring diagrams are on my site, nightscapetech [dot] com. The code that is on there is really bad, so I am in the process of cleaning it and adding more features (like the ability to modify the arm/disarm/admin code and the timer from the prop). I am also working on making better instructions.

[ScotR9642]

This is SOOOOOO AWESOME! 5*

[GhilleInTheMist95]

Wizdum, this is just awesome. Im glad you finally got around to it! Would you be willing to make and sell me one? I'll PM you about it on MaineAirsoft

[Rockersm123]

Nice!