147 lines
4.4 KiB
Plaintext
147 lines
4.4 KiB
Plaintext
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E**************************************
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* *
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* How to build a BLACK BOX *
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* *
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***************************************
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To all who dare --
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What is a BLACK BOX? A BLACK BOX
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is a device that is hooked up to your
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fone that fixes your fone so that when
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you get a call, the caller doesn't get
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charged for the call. This is good for
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calls up to 1/2 hour, after 1/2 hour
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the Fone Co. gets suspicious, and then
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you can guess what happens.
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What this little beauty does is
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keep the line voltage from dropping to
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10v when you answer your fone. The
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line is insted kept at 36v and it will
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make the fone think that it is still
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ringing while your talking. The reason
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for the 1/2 hour time limit is that the
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Fone CO. thinks that something is wrong
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after 1/2 an hour of ringing.
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All parts are available Radio
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Shack. Using the least possible parts
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and arangement, the cost is $0.98 !!!!
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And that is parts for two of them!
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Talk about a deal! If you want to
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splurge then you can get a small PC
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board, and a switch. There are two
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schematics for this box, one is for
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most normal fones. The second one is
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for fones that don't work with the
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first. It was made for use with a Bell
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Trimline touch tone fone.
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** Schematic 1 for most fones **
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** LED ON: BOX ON **
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FROM >--------------------GREEN-> TO
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LINE >--! 1.8k LED !---RED--> FONE
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!--/\/\/\--!>--!
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! !
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------>/<-------
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SPST
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Parts: 1 1.8k 1/2 watt resistor
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1 1.5v LED
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1 SPST switch
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You may just have two wires which you
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connect together for the switch.
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** Schematic 2 for all fones **
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** LED ON: BOX OFF **
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FROM >---------------GREEN-> TO
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LINE >------- ---RED--> FONE
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! LED !
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-->/<--!>--
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! !
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---/\/\/---
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1.8k
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<EFBFBD>Parts: 1 2 watt resistor
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1 1.5v LED
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1 DPST switch
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Here is the PC board layout that I
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recommend using. It is neat and is
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very easy to hook up.
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Schematic #1 Schematic #2
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************** ****************
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* * * ------- *
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* --<LED>--- * * ! ! *
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* ! ! * * ! <SWITCH> *
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* RESISTOR ! * * ! ! ! *
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* ! ! * * ! ! / *
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* -------- ! * * ! ! \ *
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* ! ! * * ! <LED>! / *
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* --SWITCH-- * * ! ! \ *
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* ! ! * * ! ! / *
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L * ! ! * F L * ! ! ! * F
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I>RED- -RED>O I>RED- ---RED>O
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N>-----GREEN---->N N>-----GREEN------>N
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E * h * E E * * E
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************** ****************
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Once you have hooked up all the
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parts, you must figure out what set of
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wires go to the line and which go to
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the fone. This is because of the fact
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that LED's must be put in, in a certain
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direction. Depending on which way you
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put the LED is what controls what wires
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are for the line & fone.
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How to find out:
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Hook up the box in one direction
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using one set offor line and the
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other for fone.
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*NOTE* For Model I switch should be OFF.
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*NOTE* For Model ][ switch should be
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set to side connecting the led.
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Once you have hooked it up, then
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pick up the fone and see if the LED is
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on. If it is, the LED will be lit. If
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is doesn't light then switch the wires
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and try again. Once you know which are
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which then label them. *NOTE* - If
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neither directions worked then your
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<EFBFBD>lable the switch in its current
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position as BOX ON.
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How to use it:
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The purpose of this box is not to
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poeple who call you so it would make
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sence that it can only be used to
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receive! calls. When the box is *ON*
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then you may only recieve calls. Your
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fone will ring like normal and the LED
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on the box will flash. If you answer
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the fone now, then the LED will
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light and the caller will not be charged.
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Hang up the fone after you are done
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talking like normal. You will not be
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able to get a dial-tone or call when
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the box is on, so turn the box *OFF*
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for normal calls. I don't recommend
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that you leave it on all the time, as
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you don't want it to answer when Ma
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Bell calls!
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