■ FIGURE 6
■ FIGURE 7
■ FIGURE 8
• STEP 3
Take a five-pin header and connect it to the carrier as
shown in Figure 8. You can break this off from one of the
unused headers. This header will be used to program the
Perseus at a later time.
EZRS232 adapter is being used.
• STEP 7
Attach a three-pin header to the carrier as shown in
Figure 12. This step is optional. This header may be used
later to add a servo for some sort of active reinforcement.
• STEP 4
Take a coax connector and solder a two-pin header to
the connector as shown in Figure 9. Bend the connector
pins closer together to hold the header in place while
you solder it. The header does not have to be perfectly
straight, but, make sure you have a good solder
connection.
• STEP 5
Now attach the connector/header assembly to the
carrier as shown in Figure 10. Pay careful attention to the
pins and orientation of the connector.
• STEP 8
Attach a 7805 voltage regulator as shown in Figure
13. I recommend inserting the 7805 just enough to solder
the leads in place.
• STEP 9
Attach a couple of wires to the piezo alarm as shown
in Figure 14. I often purchase some multicolored 22 or 24
gauge ribbon cable for this type of hookup. All you need
to do is peel off the number of leads needed. Each lead
will have a different color, so it will be easy to keep track
of the different connections.
• STEP 6
Once you solder the header in place, bend it as
shown in Figure 11. This bend allows you to plug the AC
adapter cord into the board at the same time the
■ FIGURE 9
■ FIGURE 10
• STEP 10
Attach the other end of the piezo cable to the carrier
as shown in Figure 15. The + side of the alarm is connected
to port 10 on the carrier. The other side is
connected to the pin labeled Vss.
• STEP 11
Drill two holes into a PVC cap as
shown in Figure 16a. The center hole
should be sized so that the piezo fits
tightly into the hole as shown in Figure
16b. I drilled mine just a little smaller than
the diameter of the piezo, then enlarged
it with a file and knife. The hole near the
■ FIGURE 11
42
December 2008
■ FIGURE 12
■ FIGURE 13
