madbeanpedals::forum

Projects => Tech Help - Projects Page => Topic started by: JammyDodger on December 22, 2010, 04:21:37 PM

Title: Aristocrat Diode layout
Post by: JammyDodger on December 22, 2010, 04:21:37 PM
Hey All,

I am nearly complete with my board.  I have come to the point where I need to solder in the quad of Diodes.  I want to be sure I have the polarity correct.  It is not so clear on the layout.  Can anyone help with this... close up photo or explanation?

Cheers, Mike
Title: Re: Aristocrat Diode layout
Post by: madbean on December 22, 2010, 05:24:45 PM
Each of your diodes will have a band indicating the cathode. That band is also pictured on the silk screen to show you which end to attach the leads to. It might be hard to read on the tiny silkscreen of the board, so check the image of the board in the doc. It will be more clear there.
Title: Re: Aristocrat Diode layout
Post by: JammyDodger on December 22, 2010, 06:20:24 PM
So if I look at it... it seems to show three diodes going one way and one diode going the other.

   < | ----
   < | ----
   < | ----
   | > ----

The solder mask pretty much covers up the silk screen.  It's hard to tell.

Thanks!
Title: Re: Aristocrat Diode layout
Post by: jkokura on December 22, 2010, 06:56:09 PM
Actually, it may be right. If I remember from my build, the etched boards Brian used to use ha a diode arrangment like that.

Are you using a tabbed board? Or are you using an etched board?

Jacob
Title: Re: Aristocrat Diode layout
Post by: gtr2 on December 22, 2010, 06:57:58 PM
Post edited I was looking at the etched board... ;)  Thanks Jacob
Title: Re: Aristocrat Diode layout
Post by: JammyDodger on December 22, 2010, 07:06:56 PM
It's the double sided board bought right here from Mr Madbean.

Cheers, Mike
Title: Re: Aristocrat Diode layout
Post by: jkokura on December 22, 2010, 07:09:13 PM
double sided meaning pre-fabbed?

Go here: http://www.madbeanpedals.com/projects/Aristocrat/docs/Aristocrat_ver.4.pdf (http://www.madbeanpedals.com/projects/Aristocrat/docs/Aristocrat_ver.4.pdf)

Check out the diodes to the upper left and right that are standing on end. Notice how one side has a square pad and the other has a round pad? The square pad is where the line goes on the diode. So put the line side on the square pad side and you'll be fine.

Jacob
Title: Re: Aristocrat Diode layout
Post by: JammyDodger on December 22, 2010, 07:25:17 PM
Jacob,

Perfect - I've got it now thanks!

Best Regards, Mike