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Step 2Soldering the HTC ExtUSB Breakout Board Data Wires
= 1. Using the wire cutters, cut three lengths of wire that are each about 5 inches long. If you bought more than one color of wire, make one black wire and two of your custom color.
= 2. With the wire strippers, remove about 5mm of insulation from each end of the three cables.
Now, before continuing, go grab your HTC ExtUSB breakout board and take a close look at it. One side will have tiny numbers on it that reflect the following:
6 9 11 5
O O O O
7 8 10 4
O O O O
1 2 3
O O O
The bold holes are what we are interested in. Those three holes represent GND (Hole 7), TXO (Hole 8), and RXI (Hole 9), all of which are necessary for the G1's serial communications. In case you were wondering what the other pins were tied to, this is what PodGizmo.com currently has listed:
1: USB VCC +5v
2: USB Data -
3: USB Data +
4: N / C
5: USB GND
6: Left Audio +
7: Labeled "AG" (Serial 2.8v Level GROUND)
8: Audio - (GND) Labeled "CK" (Serial 2.8v Level TX0)
9: Switch (Talk) Labeled "OT" (Serial 2.8v Level RX'I)
10: Right Audio +
11: Mic +
12: Chassis Ground (GND)
= 3. Plug in your soldering iron and let it warm up.
= 4. Grab a wire you cut earlier (the black one if you have multiple colors) and solder it through hole 7 (GND).
= 5. Grab another wire you cut earlier and solder it through hole 8 (TXO).
= 6. Grab the last wire you cut earlier and solder it through hole 9 (RXI).
After that it should look something like the picture below.
= 2. With the wire strippers, remove about 5mm of insulation from each end of the three cables.
Now, before continuing, go grab your HTC ExtUSB breakout board and take a close look at it. One side will have tiny numbers on it that reflect the following:
6 9 11 5
O O O O
7 8 10 4
O O O O
1 2 3
O O O
The bold holes are what we are interested in. Those three holes represent GND (Hole 7), TXO (Hole 8), and RXI (Hole 9), all of which are necessary for the G1's serial communications. In case you were wondering what the other pins were tied to, this is what PodGizmo.com currently has listed:
1: USB VCC +5v
2: USB Data -
3: USB Data +
4: N / C
5: USB GND
6: Left Audio +
7: Labeled "AG" (Serial 2.8v Level GROUND)
8: Audio - (GND) Labeled "CK" (Serial 2.8v Level TX0)
9: Switch (Talk) Labeled "OT" (Serial 2.8v Level RX'I)
10: Right Audio +
11: Mic +
12: Chassis Ground (GND)
= 3. Plug in your soldering iron and let it warm up.
= 4. Grab a wire you cut earlier (the black one if you have multiple colors) and solder it through hole 7 (GND).
= 5. Grab another wire you cut earlier and solder it through hole 8 (TXO).
= 6. Grab the last wire you cut earlier and solder it through hole 9 (RXI).
After that it should look something like the picture below.
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http://garr.me/?p=315
Instructable coming soon.
Pin 4 is actually 2.8v or Data High which is required for some 2 way logic level converters.
Be warned, I haven't checked if it changes during data transmission. I will post my results when I get up to that stage.