35
2. Male headers: Break the male header row into 3 sections: two 4 pin sections and one 7 pin
section. These male headers on the stereo board eventually get plugged into the female headers
on the main board, so we will use the female headers as a jig to help us install the male headers.
Back on the main board, press the male headers into the female headers (106). Orient the stereo
board as shown in 107, and align it with the top ends of the male headers. Press it into place. If
you installed the female headers onto the main board properly, you should have no trouble setting
the stereo board onto the male headers. Solder the male headers to the stereo board (108).
Remove the board from the female headers to continue installing the rest of the components (109).
106
107
108
109
3. Optocouplers: Make the second pair of optocouplers (see page 23). Install this second pair of
optocouplers on the Stereo board. Remember that the long lead goes in the square hole, and your
marked optocoupler, the one with the marked LDR inside, goes in OPTO1B (110). Solder and clip
the leads (111).
110
111
