Author Topic: "Negative Ground" newbie question  (Read 3061 times)

moritz

"Negative Ground" newbie question
« on: August 26, 2004, 02:39:42 AM »
Hi all,
I am about to embark upon my first stompbox project, a Ge Fuzz Face clone, and have a somewhat "newbish" question regarding making a PNP circuit with negative ground...

From what I have read, having a negative ground allows me to use the same power source as many of my other common pedals. I'm assuming (and I may well be completely off the ball here) this means that at the power (9V) input jack, the center pin will be negative, and the outside sleve part positive (like on boss pedals). However, when I look at the various PCB layout pictures that I have found, it appears that the positive ground version of the same circuit also has this negative center pin/positive sleve configuration at the power input jack.

Could someone please clear me up on this? Why does a negative ground allow me to use a common power supply with my other pedals as opposed to a positive ground circuit? Any help on this would be greatly appreciated. Many thanks!

Sic

"Negative Ground" newbie question
« Reply #1 on: August 26, 2004, 03:07:45 AM »
i posted a reply on the other forum section.

moritz

"Negative Ground" newbie question
« Reply #2 on: August 26, 2004, 03:28:11 AM »
ok, thanks dude.