81 lines
4.1 KiB
Plaintext
81 lines
4.1 KiB
Plaintext
|
-----------------------=======< Sanctuary >=======-------------------------
|
||
|
|
Productions
|
||
|
|
Presents.....
|
||
|
|
|
||
|
|
(Reprinted, (c) 1990, 2600 Enterprises, Inc. Volume Seven, Number Three
|
||
|
|
Autumn, 1990.)
|
||
|
|
--------------
|
||
|
|
Hellfire BBS - World Headquarters of Sanctuary 908-495-3926
|
||
|
|
Ripco ][ - On its way to be as good as the original 312-528-5020
|
||
|
|
The Works BBS - Most text philes in US..maybe even the WORLD 617-861-8976
|
||
|
|
--------------
|
||
|
|
Typed by Havok Halcyon...
|
||
|
|
|
||
|
|
Converting a Tone Dialer into a Red Box
|
||
|
|
=======================================
|
||
|
|
|
||
|
|
by Noah Clayton
|
||
|
|
|
||
|
|
A very simple modification to Radio Shack pocket tone dialer part #43-
|
||
|
|
141 ($24.95) can make it into a red box. The modification consists of
|
||
|
|
changing the crystal frequency used to generate the microprocessor's
|
||
|
|
timing. To make this modification you will need a Phillips screwdriver, a
|
||
|
|
flat bladed screwdriver, a soldering iron, a pair of long nose pliers, a
|
||
|
|
pair of wire cutters and a 6.5536 MHz (megahertz) crystal.
|
||
|
|
|
||
|
|
Orient the dialer with the keypad down and the speaker at the top.
|
||
|
|
Remove the battery compartment cover (and any batteries) to expose two
|
||
|
|
screws. Remove these two screws and the two on the top of the dialer near
|
||
|
|
the speaker. There are four plastic clips that are now holding the two
|
||
|
|
halves of the dialer together. Push on the two bottom clips near th
|
||
|
|
ebattery compartment and pull up to seperate the bottom part. Now slide a
|
||
|
|
flat screwdriver into the seam on the left starting from the bottom and
|
||
|
|
moving towards the top. (You may have to do this on th eright side as
|
||
|
|
well.)
|
||
|
|
|
||
|
|
When the two halves separate, slide the speaker half underneath the
|
||
|
|
other half while being careful not to break th tewires connecting thte two.
|
||
|
|
Locate the cylindrical metallic can (it's about half an inch long and an
|
||
|
|
eighth of an inch in diameter) and pull it away from the circuit board to
|
||
|
|
break the glue that holds it in place. Unsolder this can, which is a
|
||
|
|
3.579545 MHz crystal, from the circuit board.
|
||
|
|
|
||
|
|
The hard part of this modification is getting the new crystal to fit
|
||
|
|
properly. Bend the three disk capacitors over,[And out of the way the best
|
||
|
|
you can, making room for the new crystal. You may need to remove the screw
|
||
|
|
in the way as well.] Since the 6.5536 MHz crystal is probably much bigger
|
||
|
|
than the crystal you are replacing, you will need to bend the leads on the
|
||
|
|
new crystal so that they will match up will the pads on the circuit board.
|
||
|
|
Place the new crystal on the circuit board by soldering it in place. As an
|
||
|
|
added touch you might peel he QC sticker off of the PC board and place it
|
||
|
|
on top of the crystal. Now carefully snap the two halves back together
|
||
|
|
while checking to make sure that none of the wires are getting pinched or
|
||
|
|
are in the way of the screw holes. Put the case screws back ion and insert
|
||
|
|
three AAA batteries into the battery compartment.
|
||
|
|
|
||
|
|
You dialer is now ready to test. Switch the unit on. The LED on the
|
||
|
|
dial pad side should be lit. Set the lower slide switch to STORE mode.
|
||
|
|
Press the MEMORY button on the dial pad. Press the * key five times.
|
||
|
|
Press the MEMORY key again and then press the P1 key. A beep tone when any
|
||
|
|
key is pressed and a long beep should sound after the P1 key has been
|
||
|
|
pressed to indicate that the programming sequence was performed correctly.
|
||
|
|
|
||
|
|
Switch th eunit into DIAL mode. press the P1 key, and five tone
|
||
|
|
pulses that sound remarkably like coin tones should come out of the
|
||
|
|
speaker. I usually program P1 to be four quarters (insert one or two
|
||
|
|
PAUSE's between each set of five tones), P2 to be two quarters, and P3 as
|
||
|
|
one quarter.
|
||
|
|
|
||
|
|
Of course, you can no longer use the unit to generate touch tones.....
|
||
|
|
|
||
|
|
REFERENCE
|
||
|
|
|
||
|
|
The crystal is available from Fry's Electronics in Freemont, CA for
|
||
|
|
$0.89 plus the charge for UPS Red or Blue. Their number is 415-770-3763.
|
||
|
|
I would suggest buying five, some for future use and some just in case you
|
||
|
|
cut the leads too short when trying this project.
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
Downloaded From P-80 International Information Systems 304-744-2253
|