122 lines
4.4 KiB
Plaintext
122 lines
4.4 KiB
Plaintext
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</>-<\>-</>-<\>-</>-<\>-</>-<\>-</>-<\>
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Black Box Plans
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For Calls from Granma
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</>-<\>-</>-<\>-</>-<\>-</>-<\>-</>-<\>
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To all who dare --
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What is a BLACK BOX? A BLACK BOX is a device that is hooked up to
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your fone that fixes your fone so that when you get a call, the caller
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doesn't get charged for the call. This is good for calls up to 1/2 hour,
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after 1/2 hour the Fone Co. gets suspicious, and then you can guess what
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happens.
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The way it works:
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What this little beauty does is keep the line voltage from dropping
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to 10v when you answer your fone. The line is instead kept at 36v and
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it will make the fone think that it is still ringing while your talking.
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The reason for the 1/2 hour time limit is that the Fone CO. thinks that
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- More (Y)/N/NS? NS
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something is wrong after 1/2 an hour of ringing.
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All parts are available RadioShack. Using the least possible parts
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and arangement, the cost is $0.98!!!! And that is parts for two of them!
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Talk about a deal! If you want to splurge then you can get a small PC
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board, and a switch. There are two schematics for this box, one is for most
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normal fones. The second one is for fones that don't work with the first.
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It was made for use with a Bell Trim line 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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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 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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Parts: 1 1.8k 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 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 parts, you must figure out what set of
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wires go to the line and which go to the fone. This is because of the fact
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that LED's must be put in, in a certain direction. Depending on which way
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you put the LED is what controls what wires are for the line & fone.
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How to find out:
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Hook up the box in one direction using one set of wires for line and
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the 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 set to side connecting the led.
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Once you have hooked it up, then pick up the fone and see if the LED
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is on. If it is, the LED will be lit. If is doesn't light then switch the
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wires and try again. Once you know which are which then label them.
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*NOTE* - If neither directions worked then your switch was in the wrong
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position. Now lable the switch in its current position as BOX ON.
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How to use it:
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The purpose of this box is not to poeple who call you so it would
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make sence that it can only be used to receive calls. When the box
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is *ON* then you may only recieve calls. Your fone will ring like normal
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and the LED on the box will flash. If you answer the fone now, then the
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LED will light and the caller will not be charged. Hang up the fone after
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you are done talking like normal. You will not be able to get a
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dial-tone or call when the box is on, so turn the box *OFF* for normal
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calls. I don't recommend that you leave it on all the time, as you don't
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want it to answer when MaBell calls!
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