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The Arsenal Files 1
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The Arsenal Files (Arsenal Computer).ISO
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rebooter.bbs
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1993-08-13
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5KB
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94 lines
Crashed Bulletin Board Automatic Rebooter
┌─────────────────────────────────────────────────────┬──+12vdc
R1 │ R2 RL1 RL2 R3 │ R4
┌──┬───┼──┬─~~~~─┐ ┌─NC─> <─NC─┐ ┌─~~~~─┬──┼───┬──┐
┌─~~~~┘ ┌─┴──┴─┐ │ ═────>A C<────═ │ ┌─┴──┴─┐ └~~~~─┐
│ │ 8 4 │ │ D1 ═─NO─>B D<─NO─═ D3 │ │ 4 8 │ │
├───────┤7 3├────)─────>├─┬─) (─┬─┤<─────(────┤3 7├───────┤
│ │ IC │ │ D2 │ ) ( │ D4 │ │ IC │ │
├───────┤6 2├────┤ ┌>├─┘ ) ( └─┤<┐ ├────┤2 6├───────┤
│ │ 1 5 │ │NO ├─────) ( ────┤ NO│ │ 5 1 │ │
│ └─┬──┬─┘ S1 │ │ -12vdc │ │ S2 └─┬──┬─┘ │
│ + C1 │ └┤├┐C2 ┌┘ │ │ │ └┐ C3┌┤├┘ │ C4 + │
└─┤├──────┴─────┴───┴────┴───────────┴───────────┴────┴───┴─────┴──────┤├─┘
A<───┐ C<───┐ NC┌──────> Place in Red or Green wire in
B<─┐ │ D<─┐ │ ═──────> the telephone lead to the
│ │ │ │ NO═ answering machine.
│ │ NC┌───────┐ │ │ R5
│ │ ═──┐ │ │ │ NC┌─────~~~~~~──────>X To Answering
│ │ NO═ │ │ │ │ ═──┐ ___ NO ┌─>Y machine motor
│ └───) │ │ │ │ NO═ │ ═──S1 │ leads.
│ RL3 ) │ │ │ └───) └──) │
│ ┌───) │ │ │ RL4 ) ┌──) │
│ │ ┌──┴──┐ │ │ ┌───) │ ___ NO │
│ │ │ │ │ │ │ │ │ │ ═──S2 │
│ │ └──┬──┘ │ │ │ └──) │
│ │ │ │ │ │ ┌──) D5 │
│ │ │ │ │ │ └─────>├─────┘
┌─┐ │ │ │ │ │ │
┌──┤F├──(─┴──────┴────(────(─┴──────────────┐
┌─┴─┐└─┘ │ │ │ ┌─────┴──────┐
─┤120│ │ │ │ │ 12 vdc ├──>+12 vcd
─┤vac│ │ │ │ │power supply├──>-12 vdc
└─┬─┘ │ │ │ └─────┬──────┘
└───────┴─────────────┴────┴────────────────┘
R1 & R4 - 1 megohm Pot. │ RL1 & RL2 - Mini relays, 5 to 9 volts
R2 & R3 - 10 kilohm │ 250 to 500 ohms
R5 - as required * │
C1 ------ 47 uf │ * Install R5 & D5 if necessary, ratings
C2 & C3 - .01 uf │ as required to rectify current and limit
C4 ------ 100 uf │ voltage across S1 & S2 coils
D1-D4 --- 1N914 diodes │
S1 & S2 - 5 vdc micro relays│ Set R1 to pull RL1 20 sec.
(coils in SERIES) │ Set R4 to pull RL2 100 sec.
F ------- 10 ampere fuse │ NC = normally closed; NO = normally open
IC ------ 555 Timers (2) Cut up a heavy duty extension cord for leads.
All parts are off-the-shelf from Radio Shack.
Parts layout is not critical. Perforated board and a plastic project box
make a tidy parts support and enclosure.
Cyanoacrylate glue will hold the larger parts to the project box.
Operation:
The computer is connected to the plug which is powered through the
normally closed contacts of relay RL3.
An old answering machine is used as a ring counter. Its telephone
connection is made to the telephone feed-through of the BBS computer modem.
It is set to answer on four or more rings (Recommended: announce only mode,
if possible). The outgoing message tape motor power leads are tapped and
the taps are lead to points X and Y. Resistor R5 and diode D5 limit the
voltage across the S1 and S2 coils to their rated levels and rectify AC
motor current (install only if required). Switches S1 and S2 are the
normally open contacts of the micro-relays.
As long as the BBS answers on the first or second ring, nothing happens
in the Rebooter.
If the BBS fails to answer by the fourth ring, the answering machine starts
and the tape transport motor voltage closes S1 and S2.
Closing S1 and S2 pulls in relays RL1 and RL2, closing normally open
contacts AB and CD, and holding them for 20 and 100 seconds, respectively.
Closing AB pulls in relay RL3, which drops power to the computer power
plug for 20 seconds, causing a cold reboot.
Closing CD pulls in relay RL4 for 100 seconds, which opens the telephone
connection to the answering machine and also opens the answering machine
motor lead taps, which prevents a persistent ring from interupting the
reboot cycle.
In practice, the relays trigger each other so rapidly that the calling
party never detects the action. The calling party hears only an unanswered
ring, and is not charged with a connection on a toll call.
It may be possible to substitute one 556 dual timer chip for the two 555
chips, or it may not. I know the circuit using to 555 chips works well.