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:
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
Looks like a rechargable battery from a RC pack, notice the curve plastic pieces by the battery, shrink wrap from a battery pack? Could be an RC receiver from some model.
Weird knock-off brand battery.
Probably only sold in the Middle East...
The range for that one would be inadequate unless you want to experience the blast first-hand.
Better convert to a Spectrum or something (at least 100 mW).
It is actually pretty common in rechargeable cells like for cordless home phones, camera batteries, or RC toys. If you cut those cells open, you’ll see groups of these batteries.
Someone else on the Daily Mail website stated it was a battery pack from a RC car or something like that.
Turnigy — slightly different spelling — is very common. Odd.
Wouldn’t take much to have an on-demand delay timer.
bump
And the resistors have printing on them. It’s hard to tell, since there’s nothing for scale, but in my experience that makes them 0805 or 1206 sizes. 0603 or smaller just aren’t big enough.
The green piece with the jagged edge on top appears to fit with the jagged edge in the second photo, part of the same circuit board upside down. From the ruler, the whole intact board would appear to have been about 4 cm by 4 cm.
If it was cellphone det wouldn’t they just use a dispoasable cell phone with a headset wire plugged into board that if the voltage passed a certaint hreshold then it would trigger it. Then set a ringtone to be very loud for a certain number and silent for the default ring tone and set the loud ring tone for a payphone or another disposable phone to prevent accidental triggering...
However you could easily by an RC copter more anonymously than a disposable cell phone.....
600V AWM (Appliance Wiring Material) conductors, 14 AWG. The red one shows “Style 3135,” which is Heat-Resistant Silicone Cable. The long nomenclature is a traceability of sorts, to the insulating material.
Well, I’m pretty sure they are two different colors, which would mean two separate pcbs.
Green is by far the most common pcb color, but there are lots of blue ones as well.
Again...Alert:
CNN reporting suspect ‘clearly identified’...facial and seen placing package.....video from Lord and Taylor ....male, dark skinned.....
Umm, not sure where you got that “cell phone” photo, but it is obviously Photoshopped. It’s just a picture of a cell phone enclosure with a cropped image of a PC mother board overlaid on it. Unless, of course, there is a cell phone out there with PCI expansion slots inside and a big CPU heatsink.
cnn reporting authorities have a clear identification of suspect...photo from Lord and Taylor video....male, dark skinned...seen placing a package. Seems this is huge breakthrough.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.