Preparing The Enclosure
Drill and prepare the enclosure as shown in Figure 11. If you drill through from the bottom, remember that the hole
locations shown are now reversed. Mount four stand-offs as shown using No. 4-40 screws with star washers under the
heads. Tighten them hard.
■ FIGURE 11. Preparing the enclosure.
Wiring And Installing The Transformer
WARNING: 120 VAC is easily handled safely, but it can penetrate human flesh and can even be lethal if you are
superbly careless. Never modify wiring or insulation with power applied. Failure to follow these wiring instructions
constitutes an improper usage of this project and equipment.
Mount T1 tightly upside-down — with the bobbin seated on electrical tape — with nylon cable ties and cable feet
(Figure 12). Use #6-32 hardware to secure the feet — adhesive feet will break loose! Alternatively, bolted cable clamps
can be used. Thread the power cord through the power grommet. Solder the black wire to the fuse holder FS1, making
sure that FS-1 is placed only in the HOT (black) line. Continue the black wire from the opposite end of FS1 to T1-1. The
Now, cover T1 pins 1 and 2, and any other exposed
wiring with heat-shrink tubing and/or electrical tape. Solder
T1 secondary pins 6 and 7 together with bare wire.
■ FIGURE 12. Wiring and mounting the circuit board.