Illustrated making of PC-mobile serial interface
PJ & L. Padilla
Here you have some shots of the construction process of the PC-mobile
serial interface (click on images to enlarge). The first picture shows the
workbench, you will need at least one mobile, one PC, connectors and cables,
one voltmeter and it is advisable a prototype board to place the electronic
components during the initial tests.
The second image shows in detail the connector used in this example, but
the choice is not unique, see interface main page and
the two pictures below these lines. In this case the same connector of the
mobile charger was used. The connector can be opened easily without damage.
Only two pins are used (1 & 2), the rest are empty. You can insert cables
through the holes to emulate pins in positions 3 & 4, note that you also have
to connect another cable in position 2, which already has pin and cable going
to the charger. The cables used in twisted pair networks (with RJ-45
connectors) seem to be well suited for our purpose. If you bend the tip in the
connector, the pin will be better emulated assuring good contact with the
Circuit and PC connector
The circuit can be assembled within the PC connector. Here you have the
sequence of steps. Note that outgoing cables can be connected to the mobile
connector or, like in this case, to another intermediate connector.
Cable and mobile
Here you have the final aspect of the cable, note that it was made in
sections with the help of intermediate RJ serial connectors. It was done like
that to lighten the charger, so you don't have to carry the whole interface
when you only need the charger.
PC and software
Finally here is a picture with all together and in action. The Siemens
Data Suite is running on the PC and has a connection established
with the MC60. Note that the charger does not need to be connected for
the interface to work.
E-mail: padilla at
domain "gae ucm es" (my PGP/GPG public key)
First version: 30-Aug-2004, last update: 4-Dec-2009
This link: http://www.gae.ucm.es/~padilla/extrawork/mobilemaking.html
Go to the parent page: PC-mobile serial interface.