BS2P24 schematic and PRO board differences
bobhillier
Posts: 27
Hi! I'm new to Stamps. I was an assembly language programmer for 10 years. I then moved onto management and forgot everything about coding (except NOPs). Now, as a hobbyist, I've started to work with Stamps. WOW!·This is a really·cool product!!!
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I received my BS2p24 PRO board on Wed. I've run a bunch of demo programs and am well on my way to writing my own code. I have my main project fairly well thought out and am progressing through my project plan as planned.
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I noticed....
The BS2p24 schematic shows R2 pull-up resistor as 4.7K whereas the actual board has a 1K resistor. Is this significant? What is the difference or result of using a 1K pull-up instead of a 4.7K pull-up? (....besides 3700 ohms.) In my own circuit, are there technical reasons to use a 4.7K pull-up resistor over a 1K pull-up resistor (and vice-a-versa)?
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I also noticed the schematic has the X5 and X6 connector labels reversed compared to the physical board devices.
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One last thing....
I made a lab bench housing for my PRO board using a cut-out section of the plastic cover used in the kit packaging. I have attached a picture of this for anyone who is interested. Basically, I have cut-outs on the housing for the serial cable, power connector, RJ11 connectors and the reset switch. The rest of the board is covered with the plastic housing. I stapled one end of the package and it acts like a hinge. This keeps cats and tiny fingers from probing the board on my bench (actually, on my desk). Perhaps the Parallax guys could modify their packaging a bit to accommodate this simple product enhancement. It would be great for students/hobbyists with boards to protect.
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"Happy Stamper" Bob
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·N45 18 30·· W75 54 17
·········· G16 #27
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······ Bob, Ottawa
W75 54 17·· N45 18 30
·········· G16 #27
·
I received my BS2p24 PRO board on Wed. I've run a bunch of demo programs and am well on my way to writing my own code. I have my main project fairly well thought out and am progressing through my project plan as planned.
·
I noticed....
The BS2p24 schematic shows R2 pull-up resistor as 4.7K whereas the actual board has a 1K resistor. Is this significant? What is the difference or result of using a 1K pull-up instead of a 4.7K pull-up? (....besides 3700 ohms.) In my own circuit, are there technical reasons to use a 4.7K pull-up resistor over a 1K pull-up resistor (and vice-a-versa)?
·
I also noticed the schematic has the X5 and X6 connector labels reversed compared to the physical board devices.
·
One last thing....
I made a lab bench housing for my PRO board using a cut-out section of the plastic cover used in the kit packaging. I have attached a picture of this for anyone who is interested. Basically, I have cut-outs on the housing for the serial cable, power connector, RJ11 connectors and the reset switch. The rest of the board is covered with the plastic housing. I stapled one end of the package and it acts like a hinge. This keeps cats and tiny fingers from probing the board on my bench (actually, on my desk). Perhaps the Parallax guys could modify their packaging a bit to accommodate this simple product enhancement. It would be great for students/hobbyists with boards to protect.
·
·
"Happy Stamper" Bob
·
·N45 18 30·· W75 54 17
·········· G16 #27
·
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
······ Bob, Ottawa
W75 54 17·· N45 18 30
·········· G16 #27
504 x 414 - 119K
Comments
I'll have a look at the docs and fix any errors that you've pointed out.
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Jon Williams
Applications Engineer, Parallax
Dallas Office