Hardware Reference
In-Depth Information
Figure 8-7. One side cut and one side scored and ready to be cut
5.
Once you're done cutting the PCB, you may have noticed that it's pretty sharp and not very
nice to hold. Get out your file and sand down each edge that you cut down. Because you
cut through the holes in the board I normally sand down so that the holes and trace are
not visible or barely visible.
6.
Figure 8-8 shows where I have filed down the cut-down PCB so that it's now ready to use.
Give it a good wipe to get any dust off it. That may hamper your soldering.
Figure 8-8. PCB ready to use
7.
The battery holder I bought has the negative terminal at one end of the holder and the
positive terminal at the other end. I don't like to have a header at each end of the board;
it's just a personal preference for pin placement. However, you can have one if you like: it
won't change a thing about this project. I have soldered the two headers at one end of the
PCB. To do this, place the legs into the board and flip the board over: this will put pressure
on the legs because they are the highest part of the board. You can see in Figure 8-9 where
I have run a small trace wire from the negative terminal up to the same side that the
positive terminal is connected to.
 
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