Skip to comments.Anyone recognize the electronics found inside the Boston bombs?
Posted on 04/17/2013 9:29:17 AM PDT by swamp40
Anyone recognize the electronics found inside the Boston bombs?
I design electronics for a living, so these boards caught my attention.
The green board has some round corner notches. (Those are to avoid the screw posts in a rectangular enclosure.)
While not exactly unusual, they ARE distinctive.
I'm guessing they are some kind of remote control electronics from a place like ebay, especially since the battery used:
probably came from ebay:
The green pcb looks similar, but not exactly like an E-flite Blade CP (RC helicopter)- so I'm guessing it's a different model from E-flite.
Google Image Search for Blade CP pcb
Can you enhance the 1st pic anymore? It’s too fuzzy to correctly make out many of the components on the PCB. As an electronics tech I am very interested in seeing the electonics package used.
I’ve been designing PCB’s since ‘99, and they all look alike to me. Tough to tell what they are without much better pictures.
The pics are here:
I’d expected to see no electronics that weren’t from a mobile phone, and that’s not mobile phone electronics. The circuit board is another level of complexity in an IED.
Interesting that a Tenergy CR123 battery is found. They’re rechargeable. They’re also not intended for use in LED flashlights that use circuitry because they have voltage spikes that can damage electronics.
No, I can’t enhance it easily - but it’s easy enough for me to see.
It’s just a couple 1206 surface mount resistors and a couple surface mount caps.
The two thru-hole caps on the bottom are a tantalum (yellow) and a large (blown-up) electrolytic - those are used to stabilize the power supply.
Not enough to figure out what it does.
Someone (probably an RC enthusiast) will recognize the exact board outlines.
The green one looks the the board from a Syma S107 rc helicopter. the other one looks the board from a WL v911 rc helicopter.
I think that’s the remains of a battery back - note the black cap, transparent sleeve and leads from this site -
Just as a point of interest, the Blade CP is older and I think originally had a 72 Mhz radio. These would be unacceptably (from the bomber’s point of view) susceptible to interference and accidental detonation. All more recent transmitter/receiver combinations would be 2.4 Ghz, including literally hundreds of Chinese variations with much more secure operation. DSM, DSMX, etc., and similar with sophisticated frequency hopping, spread spectrum protocols. Bundled transmitters have very short range but upgrading to a higher power radio is straightforward. A higher power controller could have been operated from a half mile away or more.
Yes, definitely higher resolution pic of the second one. Looks like there are some SMT tactile pushbuttons on it? Or they may be power transistor packages? Could be an RC model receiver of some make. The first pic looked like cheap massed produced toy electronics.
I see boring low-tech cheap RC or electronics hobbyist parts.
The trigger would be one of these:
Background checks for mall heli purchasers now!
Better be safe than sorry.
Yes, I agree 100%. Ebay sells them, as well.
Tenergy? Is that a common brand? Never heard of it myself.
One thing Muslims do before jihad is shave themselves completely. Are there tiny shaved-off hairs in the components