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Joined: 12/1/2012(UTC) Posts: 16  Location: Stockholm Thanks: 9 times
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Hi, just testing a dual mono buffalo 3se setup. Everything works perfect, exept the mux. The two bit selector board, connected or not connected dosent seem to matter. Only input one, connected to a toslink module works with lock and light. I have tried to move the toslink module to the other inputs and selecting them with the switch. Leds on the the selector board works fine and in order when you turn it. But no lock led and no sound. Mux board are rev: 1.01 and selector board are rev: 1.1 Connections are: Selector>Mux Pin2 VDD>VD Pin4 GND>G Pin6 B0>0 Pin8 B1>1 I have measured all connections and all solder points and nothing seems to be wrong??? Please advise.  Best regards, Peter Hoppman.
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That is s arrange problem. Can you post some pictures? Include one of the top of the Mux board if you can.
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Joined: 12/1/2012(UTC) Posts: 16 Location: Stockholm Thanks: 9 times
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Hi Brian. Im sending some pictures. I case im not completely wrong, i think in picture 3 going from top to bottom. First pin is VDD, second is GND, third is B0 and fourth is B1. Thats the way i connected it and you can se it in picture 4. It corresponds both to picture 1 and 2. And if follow the path on the board i think i can se that. I have measured all the connections from each solder point on the mux board to all the solder points on the selector board and there is no bad one. Even out to the selector but i doesent match picture 2 connection points. Only B0 and B1. I you unsolder the rotary switch and connect it like in picture 2 it works. And if you also want LEDs you only connect resistor from vdd to empty central top pin and then leds to the remaining four empty pins and then to gnd. But i prefer to get the board to work. I must be blind or something.  Best regards, Peter Hoppman. astro888 attached the following image(s):  Picture 1.jpg (38kb) downloaded 10 time(s). Picture 2.jpg (71kb) downloaded 36 time(s). Picture 3.jpg (195kb) downloaded 84 time(s). Picture 4.jpg (164kb) downloaded 106 time(s).You cannot view/download attachments. Try to login or register.
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Joined: 8/17/2013(UTC) Posts: 4 
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Hi Brian,
I have the same problem.
The 4 VDD pins in the switch are not connected. I think something is missing in the pcb switch.
Best regards
Josep
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The problem lies in the fact that the switch module was actually designed for modules (Like the Buffalo III) where the selecting signal is pulled up. In the case of the CS8416 MUX board the signals are pulled down. Fortunately the solution is really simple (and I will add optional jumpers in the next revision to make it even simpler) Just solder a few short jumpers as shown in the attached picture. Edited by user Thursday, September 19, 2013 1:30:00 PM(UTC)
| Reason: Not specified Russ White attached the following image(s): Picture%203 copy.jpg (186kb) downloaded 71 time(s).You cannot view/download attachments. Try to login or register.
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BTW the reason I did it this way is that it is possible that the switch VD and the target VD are different levels (say 5V and 3.3V). Normally the switch is just switching a pulled up signal to GND, which is safest. In this case with the CS8416 MUX board it is safe to do what I described as long as you are using the VD pin at the header, which you are. :)
Also the reason the CS8416 used pull downs was because we wanted input 1 to be the default if people did not need to switch inputs.
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I will take the blame here. When I tested the switch with the MUX, I was using a prototype I had lying around which had VD connected to the switch pins (in addition to GND).
When I sat down this morning to figure out why people were having issues, it was clear pretty quickly what the problem was, and the mistake I had made. Still, it's a nicer solution than hand wiring the switch.
Sorry for the confusion.
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Yes, the jumpers are the solution I used, but after spending several hours trying to find the problem!
At least works well :)
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