SCHEMATICS FOR DAU-9P (MBUS) - NOKIA DATA CABLE

Other project [Lithium Charger][Nokia Cable][USB Charger]

The Component

To use MBus interface we need only add a 4148 diode between RX and TX and get a new cable from RX to connect it to PIN 6 in phone connector.

To get phone connector use a handsfree portatil (not nokia original, because it's too expensive) and cut connector. Be sure that it's not thermo-sealed and it uses all pins.

I recommend you to use Max3232 version, because using Max232 comunication with phone using FBUS (Data Suite) sometimes may be failed.

Component list:

Max3232 Version	Max232 Version
3x 4148 Diodes 3x 4007 Diodes 1x Voltage regulator 78L05 2x Ceramic Capacitors 100nF 4x Electrolitic Capacitors 1 microF 2x Zenner Diodes 2V7 1x I.C. MAX3232 1x Female 9 pin serial PC conector 1x Conector phone	3x 4148 Diodes 1x Resistor 1k 1x Voltage regulator 78L05 2x Ceramic Capacitors 100nF 4x Electrolitic Capacitors 1 microF 2x Zenner Diodes 2V7 1x I.C. MAX232 1x Female 9 pin serial PC conector 1x Conector phone

The Board

MAX232 version:

MAX3232 version:

The Pin on Nokia

If you don't want endanger your phone, you can buy a cable to :