[Coco] Grant Searles SBC

Bill Nobel b_nobel at hotmail.com
Wed May 6 22:27:42 EDT 2015


I am using tantalums on the charge pumps. and electrolytics currently for the decouplers. i can change the decouplers to tantalums as I have enough in stock.  I have a bunch of ceramics coming for the decouplers, as I had the same thought for that reason.

Bill Nobel

> On May 6, 2015, at 8:15 PM, Zippster <zippster278 at gmail.com> wrote:
> 
> I would normally go with .1uF ceramics, 1 per IC, perhaps 2 on  the CPU.
> 1uF or slightly larger decoupling on the MAX232.
> 
> Are you using tantalum caps for the charge pumps on the MAX232?
> Some versions can use ceramics as well.
> 
> - Ed
> 
> 
>> On May 6, 2015, at 9:03 PM, Bill Nobel <b_nobel at hotmail.com> wrote:
>> 
>> Yes I do. I am use 1uf caps right now, should I use maybe .1uf instead?
>> 
>> Bill Nobel
>> 
>>> On May 6, 2015, at 8:00 PM, Zippster <zippster278 at gmail.com> wrote:
>>> 
>>> I would think you would be ok as far as bleed over, although you could try separating them a bit.
>>> Breadboarding always makes me wonder if I’m getting reliable contact with everything.
>>> 
>>> Do you have decoupling caps on all the chips, including the MAX232?
>>> 
>>> - Ed
>>> 
> 
> 
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