80 lines
3.7 KiB
Plaintext
80 lines
3.7 KiB
Plaintext
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$$ $$
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$$ How to make a $$
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$$ $$
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$$ Pearl Box $$
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$$ $$
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$$ Written and created by: Dr. D-Code $$
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$$ $$
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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The Pearl Box: Definition - This is a box that may substitute for many
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boxes which produce tones in hertz. The Pearl Box when operated correctly can
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produce tones from 1-9999hz. As you can see, 2600, 1633, 1336 and other cru-
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cial tones are obviously in its sound spectrum.
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MATERIALS: C1, C2::::::::.5mf or .5uf ceramic disk capacitors
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Q1::::::::::::NPN transistor (2N2222 works best)
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S1::::::::::::Normally open momentary SPST switch
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S2::::::::::::SPST toggle switch
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B1::::::::::::Standard 9-Volt battery
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R1::::::::::::Single turn, 50k potentiometer
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R2:::::::::::: " " 100k potentiometer
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R3:::::::::::: " " 500k potentiometer
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R4:::::::::::: " " 1meg potentiometer
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SPKR::::::::::Standard 8-ohm speaker
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T1::::::::::::Mini transformer (8-ohm works best)
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Misc.:::::::::Wire, solder, soldering iron, PC board or perfboard
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box to contain the completed unit, battery clip
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PROCEDURE
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Since the instruction are EXTREMELY difficult to explain in words, you
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will be given a schematic instead. It will be quite difficult to follow but
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try it any way. There is also a Hi-Res picture you can get that shows the
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schematic in great detail.
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Schematic for The Pearl Box
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+-------------+------------+---------+
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! ! \ +--S1----
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C1 C2 \ SPKR
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! ! + +--------
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+ + ----+T1 +
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!\ +---------------+------+
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! b c-------!
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! Q1 !
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! e-----S2---+ !
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! ! !
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! B1 !
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! ! !
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! +-------+
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!R1 R2 R3 R4!
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/\/\ /\/\ /\/\ /\/\
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+--+ +--+ +--+
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Now that you are probably thoroughly confused, let me explain a few minor
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details. The potentiometer area is rigged so that the left pole is connected
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to the center pole of the potentiometer next to it. The middle terminal of T1
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is connected to the piece of wire that runs down to the end of the battery.
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OPERATION OF THE PEARL BOX
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You may want to get some dry-transfer decals at Radio Shack to make this
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job a lot easier. Also, some knobs for the tops of the potentiometers may be
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useful too. Use the decals to calibrate the knobs. R1 is the knob for the
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ones place, R2 is for the tens place, R3 if for the hundreds place and R4 is
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for the thousands place. S1 is for producing the all the tones and S2 is for
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power.
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Step 1: Turn on the power and adjust the knobs for the desired tone.
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(Example: For 2600 hz - R1 = 0: R2 = 0: R3 = 6: R4 = 2)
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Step 2: Hit the push-button switch and VOILA! You have the tone. If you
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don't have a tone recheck all connections and schematic. If you still
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don't have a tone call: Brainstorm BBS (612) 345-2815
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The Bay (415) 775-2384
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Pirate's Harbor (617) 720-3600
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and leave me e-mail stating what the scene is.
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This has been an HMH presentation-1985
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