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Old 2nd April 2009, 04:17 PM   #91
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Old 4th April 2009, 10:06 AM   #92
JeroenR is offline JeroenR  Netherlands
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Can someone please take a look at my wiring schema? I'm not too certain I got it right....

Are the modules connected ok and is the grounding ok?

Thanks!!!

Jeroen

Anyone? Please?

Before I do the wrong thing with my iron today...

Thanks,

Jeroen
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Old 4th April 2009, 12:04 PM   #93
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I would join the two LCDPS GNDs at the supplies, then run a single ground to COD (they are both joined on the COD board). Also eliminate the I2S GND from Metronome.
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Old 4th April 2009, 12:29 PM   #94
JeroenR is offline JeroenR  Netherlands
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Quote:
Originally posted by BrianDonegan
I would join the two LCDPS GNDs at the supplies, then run a single ground to COD (they are both joined on the COD board). Also eliminate the I2S GND from Metronome.

Hi Brian,

Thank you for taking a look at it.

Why is joining the grounds at the PS better than joining at the boards? Is it preventing from current flowing between the boards? I sort of concluded that was not possible as the boards do not share a common. Is there current flowing through the I2S lines?

Thanks,

Jeroen
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Old 4th April 2009, 12:32 PM   #95
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Just ground loop prevention. You would likely have no problems the way you had it. If you use the terminal blocks, you can pretty easily try it both ways.
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Old 4th April 2009, 07:55 PM   #96
JeroenR is offline JeroenR  Netherlands
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Quote:
Originally posted by BrianDonegan
I would join the two LCDPS GNDs at the supplies, then run a single ground to COD (they are both joined on the COD board). Also eliminate the I2S GND from Metronome.
I soldered the boards, tomorrow I'll test with just some passive IV before I install the RAKK IV. Below is the adjusted schema, I did not add the clock to the common so it is isolated from the rest.

Jeroen
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Old 4th April 2009, 08:50 PM   #97
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I did not add the clock to the common so it is isolated from the rest.
I think you will want to link the grounds so the voltages will be relative.
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Old 4th April 2009, 09:07 PM   #98
JeroenR is offline JeroenR  Netherlands
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I think you will want to link the grounds so the voltages will be relative.

The ground from the Tent clock-out is connected to the Metronome clock ground pad...
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Old 4th April 2009, 09:10 PM   #99
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Quote:
Originally posted by JeroenR



The ground from the Tent clock-out is connected to the Metronome clock ground pad...

That is fine, they will be linked there.
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Old 5th April 2009, 11:12 AM   #100
JeroenR is offline JeroenR  Netherlands
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Originally posted by JeroenR


I soldered the boards, tomorrow I'll test with just some passive IV before I install the RAKK IV. Below is the adjusted schema, I did not add the clock to the common so it is isolated from the rest.

Jeroen

It works.

One weird thing though... The COD and Metronome are stacked. I thought it would be wise to add some shielding in between so I added a 1.5mm alu plate (see photo). This proved a bad idea: every time I touched the chassis the sound disappeared...

Anyone knows what happened? The alu shielding/plate and chassis were in contact through the screws but there was no ground/common from the circuit connected to the chassis???
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