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DACS: Bus Combiner and Switcher Module
 
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Bus Combiner and Switcher Module

There is a single bus combiner board present in the prototype mixer unit. Figure 86 shows the silkscreen/assembly layer for this PC board. Table 7 shows the bill of materials for the bus combiner board. Figures 87 and 88 show the top and bottom routing layers.

Figure 86: Audio bus switcher/combiner PCB, silkscreen/assembly drawing.
\begin{figure}
\psfig{file=pcb/comb-silk.eps,width=5.5in,height=6.5in}
\end{figure}


Table 7: Bus combiner/switcher, bill of materials.
REFDES QTY DESCRIPTION
R1 - R5 5 1K ohm 1/8W
C1 1 10uF electrolytic
C2,C3 2 0.1uF monolithic
K1 - K18 18 PED DPDT 5V coil relay
D1 - D5 5 1N4004
Q1 - Q5 5 TIP120
U1 1 GAL16V8
U2 1 74LS373
J1 - J9 9 16-pin DIP header
J10 1 Molex Mini-Fit Jr. 8-circuit right-angle
J11 1 20-pin DIP header


Figure 87: Audio bus switcher/combiner PCB, component-side routing.
\begin{figure}
\psfig{file=pcb/comb-top.eps,width=5.5in,height=6.5in}
\end{figure}

Figure 88: Audio bus switcher/combiner PCB, solder-side routing.
\begin{figure}
\psfig{file=pcb/comb-btm.eps,width=5.5in,height=6.5in}
\end{figure}


next up previous contents
Next: Audio Output Module Up: Mixer Unit Previous: Audio Mix Module   Contents
Steve Richardson 2000-07-06
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