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Thomas Brittain
Works at MHMRTC
Attended College of the Ozarks
Lives in Fort Worth, TX, United States
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Thomas Brittain

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Thomas Brittain

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Check out this video on YouTube:
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Thomas Brittain

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Populated the LPC1114 board.  

I hooked it up to FlashMagic, took me a minute, but got it to read the device signature.  The little QFN is the LPC1114/333.  Hoping this version will accept Bdk6's toolchain products.

OF COURSE! I flipped the damn RX/TX on the silkscreen again.  Son-of-a-bee, I don't think I've made a board with a serial connection and gotten RX and TX correct.  Oh well.  Minor silkscreen error is much better than a major trace flaw.

One bit I didn't think about is the RES and SEL lines being tied to a 5v FTDI chip.  I need to ask Bdk6 if the LPC will tolerate 5v.  The serial lines I level convertered 3.3->5.  They work :)

Well, I think that's it for now.  Next step will be compiling something and uploading it.  
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All the pins on the chip are supposed to be 5V tolerant.  Great work.  Can't wait to see it in action.  Should have the downloader first release ready "Real Soon Now"
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Final version of the Valdez Mutant Prototype.

I added voltage-shifting on the TX/RX line between the LPC1114 and the external programmer.  Also, I added protection resistors on the lines between the LPC1114 and the HM-11's CC245x.

All components are mounted on the top surface, except two 0402 resistors for the SDA and SCL pullup.  And, the HM-11 is mounted on the bottom.

I got the HM-11's in today.  Damn itty-bitty boards.  Pretty stoked about them.

I left the linear regulator on the board for the prototype.  But if all goes as expected, I'd really like to add the Murata single package, SMD DC-DC.

http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=154670511&uq=635428437031557794

They aren't much bigger than a linear regulator.  So, why the hell not, right?  Sadly, they cost about 4 times that of a linear.  Therefore, I'll merely leave it as an option.

I put two 3mm mounting holes.  I should have put them adjacent each other, but traces didn't work.  Still, I got mounting holes on there!

The switch engages/disengages the HM-11 RX/TX lines.

Lastly, the RGB LED displays the RX/TX traffic and BLE connection status.

Well, that's it.  Boards are on their way, so keep your fingers crossed.
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My First go at a LPC1114 QFN board -- The Valdez Mutant v.01.  

Trying to add wireless uploading, via the HM-11 BLE module.  Not sure what I'm going to do with the RGB LED.  I'm also considering level converting the RX and TX.  The 6-pin header is meant for the typical FTDI breakout.  The board is the same width as an Arduino Pro Mini; it's a little longer, which holds the HM-11.

It's getting there.
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Get your PopPet! :)
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Thomas Brittain

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LPC1114 Board's in!

Now I just gotta worry about all the mistakes :(
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nice
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Low voltage latching-switch.  Voltage range 1-7v, quiescent current 250uA.  The switch should handle up to 2A.  Nifty little switch for robots.  Operation is a single push turns it on.  Then, a push and hold for ~10 seconds will turn it off.

http://www.mosaic-industries.com/embedded-systems/microcontroller-projects/electronic-circuits/push-button-switch-turn-on/switching-battery-power
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Designed a little breakout for the itty bitty HM-11.  The right header allows the typical FTDI breakout to plug right in.  Runs on 5V, the RX and TX lines are level shifted, all other lines are at 3.3V.

http://www.fasttech.com/products/0/10008268/1740900-hm-11-bluetooth-v4-0-transceiver-ble-module
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Have him in circles
37 people
Kariloy Markief's profile photo
Jaidyn Edwards's profile photo
Basile Laderchi's profile photo
razvan lixandru's profile photo
Callum King-Underwood's profile photo
Morten Guldager's profile photo
Hazel B. Runge's profile photo
visweswara rao kalla's profile photo
Kevin Chan's profile photo
Education
  • College of the Ozarks
    Psychology and Business Adminstration, 2004 - 2007
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  • MHMRTC
    Homeless Outreach Specialist, 2011 - present
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Fort Worth, TX, United States
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