This "SimpleLogger" can be used to watch the traffic between Smartcard and
CAM. (Passive Mode)
Further more it can be used as an Season Interface without an inserted Smart-
card (active Mode)
Normally the power for the MAX232 is drawn out of the Cardslot in the Sat-
receiver. Some Models, like the Irdeto System, can detect the higher current
and do not work. So this Interface uses a external Voltage for the MAX232.
It is regulated to 5 Volt onboard, so you can use any cheap powersupply in
the range of 8 to 25 Volt.
To make this design cheap there are no gimmicks like flashing diodes
or expensive connectors and switches. You have to solder the 9 or 25
pin serial cable directly the corresponding pads of the PCB.
JP1 is for "Write enable". If in passive Mode, it is impossible to write
accidently to the card or disturb the datatraffic with unwanted data.
Shorting pin 1 + 2 -> Active Mode (Write enabled)
use this setting only, if no Card is inserted in the onboard slot.
Open pin 1 + 2 -> Passive Mode (Write disabled)
Use this setting, if you want only watch the traffic between the inserted
card in the onboard slot and the receiver.
JP2 is´nt really a Jumperblock it is the connection to the serial
Port of the Hostcomputer and the external power supply.
JP2 9Pin SubD Serial port cable
Reset -> Pin 1
RX Data -> Pin 2
TX Data -> Pin 3
Gnd -> Pin 5
Gnd -> Supply Ground
Vcc -> +8 to +20 Volt AC
Note: with some Software it is possible that you have to connect the pins
4,6 and 8 together. This is best done directly at the DB9/25 connector.
IC1 = MAX232
IC2 = 78L05
D1 = BAT41 Shottky!!
D2 = 1N4148 / 1N914
C1 = 100nF Keramik
C2 = 100nF Keramik
4 x 2u2 Tantal / 25 V
1x Smartcardadapter Amphenol
It is very important for this design to use a Shottky diode for D1.
Any other type will definitely NOT work!
Look for the right polarity of the tantalum condensators! The
MAX232 includes a so called chargepump and generates positive an
negative Voltages respect to ground. So it is possible that the
positive pole of an condensator is connected to ground - this is