Скачать или смотреть HackTic Demon Dialer - DAC, filter and audio amplifier mods

An additional video showing details on the DAC, filter and audio amplifier circuit of the Hack-Tic Demon Dialer telephone phreaking box from the early 90s.

Prototype of the 1990s Hack-Tic Demon Dialer, the premier blue box/phreaking box of the day. The devices allowed controlling various domestic an international long distance trunks and switches, as well as free calls.

The methods used are long obsolete. However, my private "ProjectMF" system still allows US domestic "R1" blue boxing in a private switch. www.projectmf.org for info.

This is a re-creation of the original 1991 Demon Dialer using vintage chips and programming tools with the original firmware.

ORIGINAL DESCRIPTION FOLLOWS:

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DEMON DIALER SPECS

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The chip contains a blue-box, DTMF dialer, C4 and ATF1 tone generator and much more. Just about the whole stratum of phone-phreak knowledge has been incorporated into this device and because the chip contains an amount of RAM memory, new signaling systems can be built in. The ideal tool for today's phone-phreak.

In the sequel is a list op all the abilities of the MC68HC705C8P/DD, as it is

officially called. Furthermore a small overview of what it takes to put a nice little box around it.

THE MC68HC705C8P/DD
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It's a Motorola processor of the 68705 kind, programmed by us. It only requires an additional matrix keyboard of 3 by 4 keys, a couple of resistors, and a D/A convertor with a filter. Hook it up to 5 Volts and there ya go, da perfect phone-phreakin' tool.

If you power up the chip it's just a DTMF dialer, and if you don't enter the right code that's exactly what it will stay. Only after the code's been entered (which by the way is a different one for each chip) you can switch to the other modes:

o DTMF, RedBox, C3, C4, C5, R1, R2 (both directions) and ATF1 modes built-in. 2 new systems can be programmed later.

o Guard banding: Every tone or double-tone can be combined with a third frequency.

o Advanced Macro capabilities. Macro nesting is possible.

o All settings are stored in RAM if the machine is switched off.

o For DTMF, C5 and C3, both space and mark timing are possible.

o C3 has programmed space and mark frequency and is thus useable as a general purpose signalling system. Furthermore pulse-dialing is possible through a relay-control-signal.

o User-Defined-Modes can make use of variable timing and frequencies.

o Tone-sweep and the ability to set starting frequency and step-size. Also useable for continuous sweep.

o Phone number scan with variable step size for all signalling systems

CONSTRUCTION

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The MC68HC705C8P/DD is at the heart of a do-it-yourself bluebox, but a number of elements you will have to build yourself. You're going to have to connect the matrix keyboard as well as a simple D/A convertor and a speaker. The total cost of hardware to be added shouldn't exceed the amount of 50 guilders. On the flip page is the schematic [heheh..] and shipped with the chip is a comprehensive set of datasheets and a software manual both in English and

Dutch. The hardware description pays more attention to the D/A convertor, filter, keypad etc. than does this short article. Furthermore it contains schematics to make the device run on 3 volts and drive an 8 ohm speaker.