untitled

We used a^1 ⁄ 2 " drill bit for the phono jacks and a^5 ⁄ 16 " bit for the poten-

tiometer. To secure the speaker, we drilled four holes using a^6 ⁄ 64 " bit. You

might need to use different bit sizes, depending on the parts you use.

Wear your safety glasses whenever you drill holes or cut wires. Also, the

drill bit can bind as it goes through the plastic, causing the box to turn

with the drill if it’s not properly secured. Don’t test Murphy’s Law: Use a

vise or other method to secure the box while you’re drilling.

2. Cut openings for the DB9 connector, on/off switch, and the speaker.
   We drilled a pilot hole and then used a coping saw to cut the openings.
   The openings don’t have to be the exact shape of the part. For the DB9
   connector and the switch, make the openings big enough for the body
   of the part to fit through. The openings can even be a little oversized as
   long as enough plastic is left for you to secure the part’s flange. For the
   speaker, cut an opening about^3 ⁄ 8 " inside the outline of the speaker. All
   you need is an opening big enough to let the sound travel.


3. Insert the phono jacks, potentiometer, speaker, DB9 connector, and
   on/off switch as shown in Figure 7-11.

Potentiometer Phono jacks DB9 connector

Speaker On/off switch

Figure 7-11:
Mount
components
on the box.

Chapter 7: Murmuring Merlin 153