On 4/18/2013 9:09 PM, PrecisionmachinisT wrote:
wrote in message
...
On 4/18/2013 6:34 PM, PrecisionmachinisT wrote:
http://www.ramseyelectronics.com/sit...search&x=0&y=0


Probably more like:
http://www.simplecircuitboards.com/Timer%20Boards.html
An LM-555 and a couple of caps and resistors.

I know about the 555...it's covered extensively in the cmos cookbook..

Home made, untraceable (and no count down display like in the movies).

Not if it was triggered by cell phone...you don't want a telemarketer
setting it off, what you want an access code.




Still, I doubt it was a cell phone.
(besides the simple problem that the components in the pictures are not
phone parts)

A cell phone detonator would be great for a command detonated device.

But if that were the case, it seems like they would have had a much
higher body count.