Servo - November 2008

Figure 19

Figure 18

Each cluster has 8 sectors Number of fat tables 2 Each FAT has 244 sectors Root has 512 entries or 16384 bytes. 32 sectors Fat1=0.109 Fat2=0.353 Root=0.597 Data=0.629 Memory Card Initialized

Figure 20

• STEP 17: In order to attach the stand-offs, insert a 1/2” machine screw through a hole in the bottom base, then attach two nuts to the screw and finally the 1” stand-off (as shown back in Figures 8 and 12). This configuration will make the six-cell battery holder fit tightly inside the enclosure. If you use another kind of battery, you will need to adjust accordingly.

Figure 21

Figure 22

included. The GPS Dios should

start to display NEMA information to the debug terminal.

• STEP 16: Make the following connections to complete the hookup:

• Connect the memory card pin 1 (CS) to the carrier port 13.

• Connect the memory card pin 2 (DI) to the carrier port 10.

• Connect the memory card pin 4 (CLK) to the carrier port 12.

• Connect the memory card pin 6 (DO) to the carrier port 11.

Now insert an SD memory card into the memory card breakout board and apply power. Then plug the EZRS232

driver into the Figure 23 carrier and load the program file called DiosLogEM408.txt. This is the main logger program.

If the memory card is working properly, you should se a message that looks something like this:

• STEP 18: In order to attach the top base, you will need to line up the

LEDs and buttons to create some holes. There are a couple of ways to do this. One way is to cut out a piece of tracing paper that is the same size as the base and place it over the LEDs, then mark the LED and button positions. Before drilling the holes, add an extra 1/8” between the two LEDs.

For the LEDs, I drilled 5/32” holes. The button will depend on what is used. If you use a button that mounts to the top base, then you can attach wires to the leads and route them to ports 6 and 7. In this case, the button can be placed in several locations.

You will also need to drill a hole for the power switch. The actual diameter will depend on the switch you use.

Attach the base to the stand-offs with four 1/2” machine screws as shown in Figure 25. You will probably have to bend the leads on the LEDs in order for them to fit properly. This is normal, and if you used heat shrink as insulation, should not present a problem.

Smart Logger Operation

When power is applied to the smart logger, it will test the memory card for a file called LOGDATA2.txt. If it is not found, a 20 meg file will be created. This is just a place holder file and will be truncated as necessary when collecting data.