============================================================================== | | | FLIP_CBL.CT - 9746 - 02/07/94 | | | | Assembling a _QUALITY_ Motorola Flip programming cable | | from a standard battery eliminator. | | | | Written by KG/Control Team/Umf | | | ============================================================================== Word. It seems that alot of bad cables are being sold by some lame asses here on the west coast. The result, alot of _rare_ LO phonez are being fried. Welp, this file should clear things up. Even if you've never made anything but clay pots this should be easy for ya. Take your time and this, along with your phone will last a lifetime... Parts: (1) 550 Battery Eliminator (2) IN4001 Diodes (1) Head pins(single row straight stick headers) (1) DB25/RS232 Connector for connection to LPT1 (1) METAL DB25 cover/protector (1) 1 1/2 foot of 5 line ribbon (1) jumper wire (be creative) Tools: Sizzors (I like sizzors for splicing wires) Soldering Iron Hot glue gun (borrow mom's) Exacto knife (optional) DMM w/continuity I'll try and be as verbose as possible. All references to the plastic part that connects the phone to the cable will be known here as the ADAPTER. The hardest thing to find, at least in where I am, is a battery eliminator that has all 8 pins on the ADAPTER. So if ya do have a cable with all the pins you can skip this paragraph. What I did was to go ahead and shell out the 35 duckets for a battery eliminator that only had pin's 7 & 8 (power) on the ADAPTER. Go to you local electronix shop and pick up a pack of head pins. These puppies are the EXACT same thing as what's in the ADAPTER, 'cept their nickel instead of copper. Cut 4 of them off the plastic but be carefull not to bend them when you do so. Carefully pry off the cover of the ADAPTER and use the exacto knife to get the pins and attatched wires out of the cover. Otherwise you'll end up melting the cover, and trashing the project. Now de-solder the wires connected to pins 7 & 8, wrap then with 2 of the ribbon's leads then re-solder them back to the same pins. Once again, be carefull not to bend them. Now solder the other 4 ribbon lead to the pins 1, 4-6. Now carefully put each pin back into the ADAPTER cover, if some of the holes are filled with resin (batt eliminator), simply push an _extra_ bridge pin thru to get that shit out! Make a note of their colors, then take the DMM and and go over all the connections, making sure that no pin one pin on the ADAPTER is _touching another: 1-4, 2-8, 4-6 ect... * note that pins 7 & 8 will show values from due to the voltage regulator inside the ciggy plug. Fire up that hot glue gun and place some on the cover to make sure those pins/ wires / solder don't move around when ya put the ADAPTER back together. Don't put too much on or you wont be able to close it. Wait a min or 2 until that dries, then throw some glue into the ADAPTER and quickly close it up. As for the DB25 you shouldn't have any trouble. Just make sure you solder the Diode to the wire before soldering it the the port. Remember parallel pin specs are not the same as serial!! The following is a diagram of a DB25 connector (soldering side). The "*" marks the plain wires, "@" marks placement of the diodes, and the "+" marks where the jumper connects to the anode side of diode one: + 13 12 11 10 9 8 7 6 5 4 3 2 1 * * . . . . . . . @ . @ * . . . . . . . * . . . . 25 24 23 22 21 20 19 18 17 16 15 14 Connect the cathode(black striped) side of the IN4001 to the port!!!! Cathode Anode ------- / ----- / / LPT1/pin4 or 2 ________/__________ ADAPTER pin 1 \ or Jumper wire \ \ \ IN4001