madbeanpedals::forum

Projects => Tech Help - Projects Page => Topic started by: Axe_34 on September 13, 2012, 09:00:08 PM

Title: Dirtbag R10 orientation
Post by: Axe_34 on September 13, 2012, 09:00:08 PM
Hi everyone.

Just wanted to double-check the orientation on R10.

In the instructions it says: "R10 - a combination of 1uF and 6k8 in series instead of a single 68k resistor. I suggest using either multi-layer ceramic or electrolytic here. If using electrolytic then make the positive end go toward C7 and the negative end toward the 6k8."

I'm assuming C7 is a typo and it should be C9 since C9 is right below R10.

Anyhoo, here's a couple of pictures -- is this the right orientation?

Thanks in advance for any help.

(http://i203.photobucket.com/albums/aa227/axe_34/IMG_5286.jpg)

(http://i203.photobucket.com/albums/aa227/axe_34/IMG_5287.jpg)
Title: Re: Dirtbag R10 orientation
Post by: Axe_34 on September 15, 2012, 08:01:57 PM
Guess I'll just socket it in case I've got it in backwards.
Title: Re: Dirtbag R10 orientation
Post by: alanp on September 15, 2012, 08:15:24 PM
You can always use a 1uF film box cap if you're worried. 1uF electrolytics are used for physical space reasons, from what I understand.
Title: Re: Dirtbag R10 orientation
Post by: nzCdog on September 15, 2012, 08:59:07 PM
It does actually mean C7, but is refering to the schematic.  If you look on the project sheet at the colour board layout with traces you'll see the trace running from C7 to R10.  It's done this way so that the higher voltage is at the positive terminal of the cap, so that it works properly.
Looking at the board, this also happens to be the same side as C9 so the short answer is yes positive lead 'towards' C9 when looking at the board.

Quote from: alanp on September 15, 2012, 08:15:24 PM
You can always use a 1uF film box cap if you're worried. 1uF electrolytics are used for physical space reasons, from what I understand.
This ^  8)
Title: Re: Dirtbag R10 orientation
Post by: Axe_34 on September 15, 2012, 09:30:47 PM
Super. Thanks for the help guys.