55 lines
2.5 KiB
Plaintext
55 lines
2.5 KiB
Plaintext
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The Pearl Box:Definition - This is a box that may substitute for many boxes
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which produce tones in hertz. The Pearl Box when operated correctly can pro-
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duce tones from 1-9999hz. As you can see, 2600, 1633, 1336 and other crucial
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tones are obviously in its sound spectrum.
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Materials you will need in order to build The Pearl Box:
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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, box to
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contain the completed unit, battery clip
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Instructions for building The Pearl Box:
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========================================
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Since the instruction are EXTREMELY difficult to explain in words, you will be
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given a schematic instead. It will be quite difficult to follow but try it any
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way. There is also a Hi-Res picture you can get that shows the schematic in
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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 de-
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tails. The potentiometer area is rigged so that the left pole is connected to
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the center pole of the potentiometer next to it. The middle terminal of T1 is
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connected to the piece of wire that runs down to the end of the battery.
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