The explosion in male' was caused by a simple homemade IED device that used atrigger combined with washing machine timer and a mobile phone.
Components:
- Nokia 1110
- Washing machine timer
- Detonator Circuit
- 9V Battery and Clip
- Detonator
- Lighter gas can
The mobile phone used in the device is a Nokia 1110. The phone have two easy options to use as a trigger for the detonator circuit. One option is to use the connections to the phones vibrating motor. This connection provides a voltage of 3v when the phone is ringing.
The other option is to connect the detonator circuit to the phones ring speaker.
Washing Machine Timer
Once the device is armed, the device is ready to explode even for a false ring to the mobile number. To prevent this the washing machine timer is used. The washing machine timer usually have a delay of 15 - 20 mins. The timer provides a safe exit time of 15 mins. Once the washing machine timer is finished ticking then the circuit is completed for the detonator.
Detonator Circuit
The detonator circuit probable was powered by the 9V Battery. The main component would be a transistor to trigger the circuit on reception of a voltage from the mobile device to the transistor base.
Detonator
Detonator could be a wire from a small bulb or a single strand of thin copper wire. This wire could have been inserted into a paper tube of gunpowder from match sticks. Once the 9V is applied to the wire, the wire becomes red hot and ignites the gun powder and providing enough explosive power to ignite the lighter gas can.
Lighter Gas Can
The Lighter gas can was the main fuel in the explosion as is proved by the burn injuries of the victims. For make it more lethal hundreds of nails was used. These nails was probable wrapped around the can using paper that is visible in the picture above.
Conclusion
In concluding the analysis, the device is not very technically sophisticated. But the maker of the circuit and the detonator device must have a fair knowledge of electronics and chemistry. It is a work done by some amateurs. Any body who have access to the internet could have made a more powerful explosive with a more sophisticated detonating device with a digital timer.
Note: I have tried my best not to reveal the technical knowhow for such a device.
7 comments:
But this info is enough for a prankster to make a good start. Anyway gud analysis.
yea..quite informative analysis....
yeah ...
i thought the phone was used as trigger machanism ...
you know someone call this phone and the bomb goes off ...
but i was wondering what the washing machine timer was doing ...?
so didnt make much sense ... hehe ...
Doesn't a washing machine timer "open" the circuit when it comes to "0". The motor/rotor turns off. So shouldn't that be an open circuit?
If not, which circuit does it close (give power to) when it is "0"?
there are 2 breaks in the circuit b4 it explodes . the first break is closed by the timer when it times up. the second part (which wud complete the whole circuit) will be completed when a call comes to the phone. and KABOOOM!!
so anyways , a call is needed for it to xplode. if the call comes b4 the timer completes the circuit, then it will xplode when the timer is up. giving the wahha bees the time to flee.
the 2 contac parts of the timer can be installed with wire in such a way that the 2 wires can contact when the timer is up to 0 (which wud make it go KABOOM)
:D
very informative....
why do u think, Sultan park was selected as the target. Is their motive, killing foreigners or to harm tourism industry, or showing their presence to other extremists worldwide (Alqaida)... I wonder what it could be...
"Note: I have tried my best not to reveal the technical knowhow for such a device."
You have given the whole recipe.. technically what else is there to know?
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