- Secure the phono jacks and potentiometer with the nuts provided
with each part.
The outside of the box is shown in Figure 7-12.
You can secure the speaker with four^1 ⁄ 2 " 6-32 flathead screws and four
6-32 nuts. Use glue on the flanges of the DB9 connector and on the on/off
switch to attach them to the box.- Solder the black wire from the battery pack to one lug of the on/off
switch and solder an 8" black wire to the other lug of the on/off
switch, as shown in Figure 7-13. - Solder a 6" black wire to each of the two solder lugs on the speaker, as
shown in Figure 7-13. - Solder an 8" wire to each of the three potentiometer lugs, as shown
Figure 7-14. - Connect 8" wires to each of the audio jacks and solder them, as shown
in Figure 7-14. - Use Velcro to attach the breadboard and the battery pack to the box.
Figure 7-12:
A view from
the outside.154 Part II: Sounding Off!