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Propeller Mini Development Board — Parallax Forums

Propeller Mini Development Board

BeanBean Posts: 8,129
edited 2008-08-17 14:13 in Robotics
Hey guys, I've designed a new development board for the Propeller.
Check it out...

Features:
· USB powered (PTC Fused at 250mA for USB port protection)
· Small size: 1.8" x 3.75" (not including connectors)
· Programmable LED (Red)
··RCA for video output
··PS/2 connector (uncommitted)
· 3-Pin header for 5V LCD
· Ground Lug for oscilloscope
· Breadboard area with access to Gnd,3.3V,5V and P0 to P11 on both sides
· 64KB EEPROM (32K for data storage)

attachment.php?attachmentid=54171

[noparse][[/noparse]Edit] Added PDF document

Bean.
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"A government big enough to give you everything you want, is big enough to take away everything you·have."·· Thomas Jefferson

"It is our choices, Harry, that show what we truly are, far more than our abilities."·Dumbledore from Harry Potter

www.iElectronicDesigns.com



Post Edited (Bean (Hitt Consulting)) : 7/10/2008 11:44:51 AM GMT
Prop Mini Development Board Rev B Small.jpg
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Prop Mini Development Board Rev B.jpg
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Prop Mini Dev Brd Rev B.pdf
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Comments

  • ColeyColey Posts: 1,110
    edited 2008-06-18 19:48
    Nice work Bean,

    That could be very handy popped into the side of my laptop!!

    I have a few questions:-

    Is it 5MHz crystal?
    What power rating is the regulator?
    Target price?


    Regards,

    Coley

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    PropGFX Forums - The home of the Hybrid Development System and PropGFX Lite
  • BeanBean Posts: 8,129
    edited 2008-06-18 20:30
    Yes it has a 5MHz crystal.

    It is designed to provide 200mA from the 3.3V regulator. I'll check this to see what the limit is before either the regulator shuts-down or the PTC trips.

    Price is not firm, but should be in the $59 range. It depends on alot of factors.

    Bean.

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    Uhhhm, that was on fire when I got here...

    www.iElectronicDesigns.com

    ·
  • DiablodeMorteDiablodeMorte Posts: 238
    edited 2008-06-19 18:20
    Looks pretty awesome. Have you considered using a female mini usb b? We already have that cable if we have the protoboard and I think it would make the board look more "profeshional." With your min dev board ppl would either have to buy a new USB to USB connector or plug in into a port(which I would be worried it would break off

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    Current Projects:
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  • BeanBean Posts: 8,129
    edited 2008-06-19 18:41
    The idea is that you can plug the board directly into the USB port.
    I don't know how many people will do that, but that is the idea.
    Plus I already have 1000 USB-A connectors tongue.gif

    P.S. The board will come with a USB extension cable too.

    Bean.

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    Uhhhm, that was on fire when I got here...

    www.iElectronicDesigns.com



    Post Edited (Bean (Hitt Consulting)) : 6/19/2008 6:48:05 PM GMT
  • RobotWorkshopRobotWorkshop Posts: 2,307
    edited 2008-06-19 19:40
    Very nice! Are you going to bring along an example to the Propeller expo in August so people can see it firsthand?

    Robert
  • BeanBean Posts: 8,129
    edited 2008-06-19 20:12
    Very nice! Are you going to bring along an example to the Propeller expo in August so people can see it firsthand?
    Absolutely! It should be available for purchase by then.

    Bean.


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    Uhhhm, that was on fire when I got here...

    www.iElectronicDesigns.com

    ·
  • BeanBean Posts: 8,129
    edited 2008-06-19 20:29
    What power rating is the regulator?
    I tested the 3.3V regulator.

    You can draw 200mA from the 3.3V supply all day long.

    At I was able to use 225mA, but at 250mA the thermal fuse opened. Simply removing the load and everything started back up again. You gotta love those PTC fuses.

    The 5V supply is through the same PTC, so that is a TOTAL of 200mA from both the 5V and the 3.3V supplies.

    Bean.




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    Uhhhm, that was on fire when I got here...

    www.iElectronicDesigns.com

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  • Mike GreenMike Green Posts: 23,101
    edited 2008-07-10 02:30
    Bean,
    I finally looked at the schematic. If there's a revision B, you really should put a series resistor in the clock and data lines from the PS/2 connector. I know you can use a resistor as a jumper from the header to the Propeller I/O pin header, but IMHO, it would have been more useful to not have the header, have a 100 or 220 Ohm resistor, then a direct line to a pair of otherwise unused I/O pins.

    By the way, do you have an estimated price yet?
  • BeanBean Posts: 8,129
    edited 2008-07-10 02:43
    Mike,
    · Oops. I missed that on the schematic. There ARE series resistors to the header pins.
    · I didn't have a easy way to connect to any of the propeller pins, so I took the easy way out...But it does leave your options open.

    · I'll get the schematic fixed asap.

    · Preliminary price is $69.95. And comes with a 3' (1M) USB extension cable.

    Bean.

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    "A government big enough to give you everything you want, is big enough to take away everything you·have."·· Thomas Jefferson

    "It is our choices, Harry, that show what we truly are, far more than our abilities."·Dumbledore from Harry Potter

    www.iElectronicDesigns.com

    ·
  • BeanBean Posts: 8,129
    edited 2008-07-10 11:43
    Schematic fixed and uploaded in first post.
    Thanks for catching that Mike.
    P.S. Production boards will be blue instead of green too.

    Bean.

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    "A government big enough to give you everything you want, is big enough to take away everything you·have."·· Thomas Jefferson

    "It is our choices, Harry, that show what we truly are, far more than our abilities."·Dumbledore from Harry Potter

    www.iElectronicDesigns.com

    ·
  • DgswanerDgswaner Posts: 795
    edited 2008-07-13 21:11
    I just look at your web site and didn't see this on there yet, could I be notified when they are available? I can Pm you my e-mail if this is an option.

    Thanks

    what is the bottom of the board like? is it just the bottom of the PCB? I like to mount boards like this on some thing to prevent me setting it on something and shorting it out. are mounting holes an option?

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    "A complex design is the sign of an inferior designer." - Jamie Hyneman, Myth Buster

    DGSwaner

    Post Edited (Dgswaner) : 7/13/2008 9:17:10 PM GMT
  • BeanBean Posts: 8,129
    edited 2008-07-13 22:08
    No mounting holes, but rubber feet will be included.

    I need to do some maintence on the website, I'll put it on then. They should be available in about 4 weeks.

    Bean.

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    "A government big enough to give you everything you want, is big enough to take away everything you·have."·· Thomas Jefferson

    "It is our choices, Harry, that show what we truly are, far more than our abilities."·Dumbledore from Harry Potter

    www.iElectronicDesigns.com

    ·
  • Lord SteveLord Steve Posts: 206
    edited 2008-07-15 01:07
    Bean,

    One thing I notice about your designs is that you keep 90-degree corners in your routes.· I guess I by second nature now make all my corners at·least 135·degrees because I was taught that 90-degree corners can cause worse signal reflection.· Have you ever heard this?

    Maybe you have found·that for your projects the corner sharpness doesn't matter.

    Thanks for any feedback.
  • LeonLeon Posts: 7,620
    edited 2008-07-15 09:07
    At those frequencies 90 degree bends don't have any effect. They can cause problems with etching, which is why most people avoid them. A nice feature of the the software I use is that it can mitre all corners automatically.

    Leon

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  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-07-15 15:16
    I agree with Leon…High Speed devices, such as modern PC Motherboards have to deal with issues like trace linearity and even length. If you look at a modern PC motherboard you will even find some traces that are squiggles taking up extra space to even out the length compared to other traces on the same bus. BASIC Stamps, SX Chips and even the Propeller don’t run at speeds where traces being at 90 degrees will affect the circuit. Before I came to Parallax I used 90 degree bends in my own PCB layouts. However Parallax, like most companies that make their own PCBs, have guidelines that are followed and for us that includes routing traces not using 90 degree bends when possible. The posts that seem to be the exception for many companies is at a T junction in the trace.

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    Parallax Tech Support
  • BradenBraden Posts: 5
    edited 2008-07-15 17:02
    Nice work, that is really cool!

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  • MarkSMarkS Posts: 342
    edited 2008-07-18 15:52
    What is that silver thingy at the top of the board, to the left of the breadboard?
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-07-18 15:54
    Mark,

    That is a ground lug/post. Makes it easy to connect your scope's ground clip when testing signals. These types of posts are also used as test points on some boards.

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    Chris Savage
    Parallax Tech Support
  • Brian CarpenterBrian Carpenter Posts: 728
    edited 2008-07-30 00:57
    Guys. I have seen the Blue Professionally Assembled boards and they look fantastic. Probly cuz i did the assembly. Anyway, they are cool.

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    It's Only A Stupid Question If You Have Not Googled It First!!
  • BeanBean Posts: 8,129
    edited 2008-07-30 11:34
    As soon as Brian gets some boards to me, I'll get some pics on here.
    And they will available for purchase then too.
    Soon guys...Very soon.

    Bean.

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    "A government big enough to give you everything you want, is big enough to take away everything you·have."·· Thomas Jefferson

    "It is our choices, Harry, that show what we truly are, far more than our abilities."·Dumbledore from Harry Potter

    www.iElectronicDesigns.com

    ·
  • Brian CarpenterBrian Carpenter Posts: 728
    edited 2008-08-06 22:48
    any progress? i think i want 50 of them[noparse]:)[/noparse]

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    It's Only A Stupid Question If You Have Not Googled It First!!
  • BeanBean Posts: 8,129
    edited 2008-08-06 23:22
    I forgot and left them at work [noparse]:([/noparse]

    I'll get some picture tomorrow.

    But they are here, I just need to get them on the website.

    Bean.

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    "A government big enough to give you everything you want, is big enough to take away everything you·have."·· Thomas Jefferson

    "It is our choices, Harry, that show what we truly are, far more than our abilities."·Dumbledore from Harry Potter

    www.iElectronicDesigns.com

    ·
  • Brian CarpenterBrian Carpenter Posts: 728
    edited 2008-08-07 00:57
    WHAT!?!?

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    It's Only A Stupid Question If You Have Not Googled It First!!
  • Oldbitcollector (Jeff)Oldbitcollector (Jeff) Posts: 8,091
    edited 2008-08-07 01:16
    Hey Bean, these sound like they will be right up my alley as well...
    Perhaps FemtoBASIC "color" might work as well?

    PICS! Don't tease us! [noparse]:)[/noparse] [noparse]:)[/noparse]

    OBC

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    New to the Propeller?

    Getting started with a Propeller Protoboard?
    Check out: Introduction to the Proboard & Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card connected? - PropDOS
  • BeanBean Posts: 8,129
    edited 2008-08-07 11:52
    OBC,
    They look like the pic in the first post, only BLUE instead of green (by suggestion of Ken G).

    My goal is to get femtoBASIC running on them for the expo. It shouldn't be too hard. Famous last words...

    They will be door prizes at the expo as well (5 or so).

    Price will be $69.95. This is the same as the Prop Dongle but the Prop Mini Dev Board has a breadboard, PS/2 and RCA built-in. Only drawback is a 64K EEPROM (Prop Mini Dev Board) instead of a 128K EEPROM (Prop Dongle).

    Bean.

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    "A government big enough to give you everything you want, is big enough to take away everything you·have."·· Thomas Jefferson

    "It is our choices, Harry, that show what we truly are, far more than our abilities."·Dumbledore from Harry Potter

    www.iElectronicDesigns.com

    ·
  • Oldbitcollector (Jeff)Oldbitcollector (Jeff) Posts: 8,091
    edited 2008-08-07 13:49
    Bean,

    Try this version.. I'm curious if it works on your board...

    http://forums.parallax.com/showthread.php?p=690283

    OBC

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    New to the Propeller?

    Getting started with a Propeller Protoboard?
    Check out: Introduction to the Proboard & Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card connected? - PropDOS
  • BeanBean Posts: 8,129
    edited 2008-08-07 17:19
    OBC,
    · I'll try it as soon as I can.

    · Here is a picture of the production boards. I'll try to get them on the website this weekend.
    · They come with rubber feet and a 3' USB extension cable for $69.95 each + $10.00 for shipping any qty.
    · If anyone wants one of these first ones, feel free to paypal payment to terry@hittconsulting.com

    attachment.php?attachmentid=55002

    Bean.


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    "A government big enough to give you everything you want, is big enough to take away everything you·have."·· Thomas Jefferson

    "It is our choices, Harry, that show what we truly are, far more than our abilities."·Dumbledore from Harry Potter

    www.iElectronicDesigns.com
    Prop Mini Development Board Rev B Blue Small.jpg
    1353 x 649 - 367K
    pdf
    pdf
    Prop Mini Dev Brd Rev B.pdf
    364K
  • WhitWhit Posts: 4,191
    edited 2008-08-07 21:53
    These came out great Bean!

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    Whit+


    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • Brian CarpenterBrian Carpenter Posts: 728
    edited 2008-08-08 00:14
    those look spectacular

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    It's Only A Stupid Question If You Have Not Googled It First!!
  • Mike GreenMike Green Posts: 23,101
    edited 2008-08-08 00:46
    Bean,
    You should just have to change the I/O pin numbers for the PS/2 interface and the video output, then recompile FemtoBasic.
    It'll ignore the absence of an SD card although you could add one to any group of 4 I/O pins and change the pin numbers in the program to match.
    You could also run DongleBasic on it although then it wouldn't use the video output or PS/2 interface.
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