Author Topic: What Does * mean on PCB  (Read 2492 times)

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Offline Jbliss

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What Does * mean on PCB
« on: May 31, 2015, 10:12:30 pm »
Hi i have a Class D audio amplifier Kit and it of the PCB next to 3 capacitors which are 560pf it has a *  (560pf*) there where none of these caps supplied in the kit does this mean to make a link or .....?

thanks Jbliss  :-/O


heres the kit
http://www.jaycar.com.au/Kits,-Science-%26-Learning/Electronic-Project-Kits/Audio/High-Power-Class-D-Audio-Amplifier-Kit/p/KC5514
 

Offline Jbliss

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Re: What Does * mean on PCB
« Reply #1 on: May 31, 2015, 10:39:35 pm »
Please Help  :-\ :-\ :-\ :-\ :-\
 

Offline SeanB

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Re: What Does * mean on PCB
« Reply #2 on: May 31, 2015, 10:40:03 pm »
Probably means not supplied in kit, optional if needed. Those probably are only going to need installation if you are using it with either long leads to the speakers or have some RFI issues after installation.
 

Offline janoc

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Re: What Does * mean on PCB
« Reply #3 on: June 01, 2015, 12:00:30 am »
Hi i have a Class D audio amplifier Kit and it of the PCB next to 3 capacitors which are 560pf it has a *  (560pf*) there where none of these caps supplied in the kit does this mean to make a link or .....?

thanks Jbliss  :-/O


heres the kit
http://www.jaycar.com.au/Kits,-Science-%26-Learning/Electronic-Project-Kits/Audio/High-Power-Class-D-Audio-Amplifier-Kit/p/KC5514

That should be explained in the documentation to the kit, no? Usually that sort of mark indicates a footnote or remark, some catch that is explained in small script in the documentation. It doesn't  have a particular meaning alone.

SeanB could be right on the money that it is for optional caps, but check the documentation to be sure.

 

Offline donotdespisethesnake

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Re: What Does * mean on PCB
« Reply #4 on: June 01, 2015, 12:26:45 am »
The kit was originally described in Silicon Chip magazine, November 2012. You can buy the articles of Silicon Chip website, but I found an online reprint from EPE http://issuu.com/yurgenn/docs/everyday_practical_electronics_2013_25703931aba98b pages 12 onwards.

It appears the 3 x 560pF are required for normal operation, not sure why they are marked *. I can't see any note in the article.
Bob
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Online Zero999

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Re: What Does * mean on PCB
« Reply #5 on: June 01, 2015, 03:23:40 am »
Ah, I hate adobe flash. Why not just use PDF?

I've extracted the schematic.

EDIT:
The datasheet and application note for the IRS2092 will also help.
http://www.irf.com/product-info/datasheets/data/irs2092.pdf
http://www.irf.com/technical-info/appnotes/an-1138.pdf
« Last Edit: June 01, 2015, 03:26:10 am by Hero999 »
 

Offline SL4P

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Re: What Does * mean on PCB
« Reply #6 on: June 01, 2015, 07:07:06 am »
Silicon Chip - definitely means the value or component selections is discussed in the text of the article, or as a side-bar to the schematic.
Don't ask a question if you aren't willing to listen to the answer.
 


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