Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: galannthegreat on May 04, 2009, 01:33:15 PM

Title: Homemade PIC robot board.
Post by: galannthegreat on May 04, 2009, 01:33:15 PM

I am making my own "PIC board" for my robotics projects. I am trying to save as much space as possible on the board with out causing any serious problems, and now I just have one simple question. Would having the crystal placed under the MCU cause too much electrical noise that would interfere, or should I place it somewhere else?

Title: Re: Homemade PIC robot board.
Post by: hazzer123 on May 04, 2009, 01:55:24 PM

Placing a crystal there wouldn't cause too much electrical noise :)

Title: Re: Homemade PIC robot board.
Post by: galannthegreat on May 04, 2009, 01:57:29 PM

Thank you very much. :)

Title: Re: Homemade PIC robot board.
Post by: GearMotion on May 04, 2009, 01:58:17 PM

Quote from: galannthegreat on May 04, 2009, 01:33:15 PM

I am making my own "PIC board" for my robotics projects. I am trying to save as much space as possible on the board with out causing any serious problems, and now I just have one simple question. Would having the crystal placed under the MCU cause too much electrical noise that would interfere, or should I place it somewhere else?

It will be fine under the processor.

Title: Re: Homemade PIC robot board.
Post by: galannthegreat on May 04, 2009, 02:02:11 PM

Thank you aswell.

I just absolutely hate having something so far off and taking up valuable board space, and now it'll make the board a little neater looking aswell. :)

Title: Re: Homemade PIC robot board.
Post by: paulstreats on May 04, 2009, 06:46:35 PM

I remembe seeing a recommendation just recently about running +5v and gnd directly under the PIC lengthways to help remove noise, maybe this could also be a consideration for you.

Title: Re: Homemade PIC robot board.
Post by: SmAsH on May 05, 2009, 12:50:19 AM

Quote from: paulstreats on May 04, 2009, 06:46:35 PM

I remembe seeing a recommendation just recently about running +5v and gnd directly under the PIC lengthways to help remove noise, maybe this could also be a consideration for you.

i do that always anyway... but i never knew it would do that?

Title: Re: Homemade PIC robot board.
Post by: galannthegreat on May 05, 2009, 11:09:21 AM

Thanks paulstreats, I will consider this.

Title: Re: Homemade PIC robot board.
Post by: TrickyNekro on May 05, 2009, 01:52:05 PM

I placed one many times...
What you need to consider is power cables over the crystal line and to keep crystal lines short....

Title: Re: Homemade PIC robot board.
Post by: galannthegreat on May 06, 2009, 12:39:34 PM

I've finished the board, just need to get some pics up of it.

Title: Re: Homemade PIC robot board.
Post by: galannthegreat on May 11, 2009, 02:11:51 PM

Here are some pics of the completed board. Give me some suggestions I should consider or integrate into the board.

Title: Re: Homemade PIC robot board.
Post by: SmAsH on May 11, 2009, 02:28:11 PM

wow, great job! so is it like a giant $50 board?

Title: Re: Homemade PIC robot board.
Post by: galannthegreat on May 11, 2009, 04:20:54 PM

Yea, it would be called that, but with a PIC, and now I'm thinking if I should write a tutorial on this, for the minority of PIC users and the like who want to use them.