experimenter pcb, white noise scheme

isak

Hi Guys.

have a question about the C35 and C36 caps in the power section.
should they be in parallel with the electrolytic C29 and C30?
i'm asking cause i see that they are mentioned in the scheme separately.

Posted Image

i stripboard it so if you wanna test it please do Smile

-minus- · Joined: Oct 26, 2008 Posts: 787 Audio files: 13

I'd say those two caps are to be mounted onto the board as close to the + and - pins of the IC as possible.

isak · Posted: Tue May 22, 2012 2:07 am Post subject:

Thank you for your reply minus.

As I understand they way I put them in the strip is not ok (C8-C9)?
Can you please explaine why they need to be close as possible to the IC (-) and (+) pins?

Thanks in advance,
Isak E.

-minus- · Joined: Oct 26, 2008 Posts: 787 Audio files: 13

Ah sorry. I missed seeing the C8 and C9 on your stripboard. They act as a reservoir for the IC's power supply pins. I'm unsure where I read they need to be as close as possible. I place them at the hole right next to the power pins on the chip. Maybe someone else will know why Laughing

. It would probably work with them as they are. Or even without them! Shocked

If you look on ray's Mfos site you will see he has them pretty close to the chip on his pcb's...

Just found this:

http://en.wikipedia.org/wiki/Decoupling_capacitor

isak · Posted: Tue May 22, 2012 3:05 am Post subject:

Thank you

EDIT :

i think i understand why..
maybe some parts wont get the power they need to get if the caps is in the start of the circuit?

i'm just guessing Rolling Eyes