Mossad-style Assassination Cellular Phone


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There is alot of evil and hatred in the world today.  Eurinals, Canadians, Democrats, Mexicans, Russians, Muslims, $2600 subscribers, Slashdot posters, etc.  Thankfully, there are still some people around who "get" it.

Israeli domestic (Shin Bet) and foreign (Mossad) security doesn't put up with any crap from camel-humpers.  They attack the source of the problem quicky and with directed force.  That was the scene January 6, 1996 when a bomb planted inside the cellular phone of Yehiya "The Engineer" Ayyash exploded - sending his Hamas loving brains straight to hell.

Now, you to can also enjoy this satisfaction with your own little Touch-Tone® (DTMF) controlled exploding cellular phone.  It should be noted that this phone doesn't really explode, it just lights a LED when it receives a steady burst of the DTMF "A" key (697 Hz & 1633 Hz).  Consult your local Mosque for more information on explosives.

The California Microdevices CM8870 DTMF decoder IC is connected to the cellular handset speaker's positive (+) lead.  The 100k resistors may need to be lowered if the speaker volume is too low for proper DTMF digit detection.  The CM8870's 4-bit logic output is run into a 74HC138 3-to-8 line decoder IC.  This transforms the 4-bit output of the CM8870 into a single control line.  This line will go LOW on the 74HC138 when enabled.  A simple logic inverter or pass transistor may be needed depending on your external drive requirements.

A quirk in this design is that the output control line is sometimes "enabled" briefly while powering the phone down.  Be sure to test everything ahead of time.

To use the new DTMF detection circuitry, call the cellular phone's number.  When the called party answers, press the "A" key on your DTMF keypad.  Most normal phone's don't have that key (or the B, C, or D keys) so you may need to purchase or build a full 16-key DTMF keypad.  The use of a non-conventional DTMF tone was chosen to help prevent any false detections.

It is also possible, on analog cellular networks, to transmit the DTMF tone over the cellular phone's receive (cell site downlink) frequency.  Just scan out the phone's transmit frequency, add 45 MHz, then transmit your tone on that new frequency.  The GBPPR Cellular Phone Talk-Over is a device which you can build to do just this - and alot more.

Internal view of a "bugged" Motorola TeleTac 250.

Closeup picture of the CM8870 (top IC) and the 74HC138 (bottom IC) mounted "dead-bug" style on the duplexer.  The yellow wire leading off to the bottom right is a +5 VDC tap, on the PC board connector.  The metal of the duplexer can be used for the ground.

Phone's speaker area.  Lots of room to work with.  The RED lead going to the speaker is the positive (+) lead.  Tap the audio input from its exposed PC board solder pad.