stm32 dip

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1

I’m considering sending the fixed design for manufacture.

There’s a couple of issues.

  1. would people prefer a 500mA capable supply over a 300mA one?
  2. should I replace the mini-usb with micro-usb connector?
  3. anyone have strong feelings about adding a rtc crystal?

Ben Dooks, http://www.fluff.org/ben/ bjdooks@googlemail.com

2

Sorry , what is this for?On 14 December 2012 10:21, Ben Dooks bjdooks@googlemail.com wrote:

I’m considering sending the fixed design for manufacture.

There’s a couple of issues.

  1. would people prefer a 500mA capable supply over a 300mA one?
  2. should I replace the mini-usb with micro-usb connector?
  3. anyone have strong feelings about adding a rtc crystal?

–
Ben Dooks, http://www.fluff.org/ben/ bjdooks@googlemail.com

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3

http://www.fluff.org/ben/stm32_dip1_v4.pdf

It is a simple board for stm32 devices of the LQFP48 type. The power is
provided by an optional 300mA 5->3.3V DC-DC converter with external enable
and low-power LDO mode. It has a 10pin JTAG header and 48 pins arranged in
dip format.

I think the cost would be around £10 each builtOn 14 December 2012 10:24, Kimball Johnson kimball@bowerham.net wrote:

Sorry , what is this for?

On 14 December 2012 10:21, Ben Dooks bjdooks@googlemail.com wrote:

I’m considering sending the fixed design for manufacture.

There’s a couple of issues.

  1. would people prefer a 500mA capable supply over a 300mA one?
  2. should I replace the mini-usb with micro-usb connector?
  3. anyone have strong feelings about adding a rtc crystal?

–
Ben Dooks, http://www.fluff.org/ben/ bjdooks@googlemail.com

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Ben Dooks, http://www.fluff.org/ben/ bjdooks@googlemail.com

4

Cool.

  1. 500mA sounds like a better idea.
  2. Micro usb is my preference as they are becoming more common than mini.
  3. Can you leave the rtc xtal in there, but make population
    optional… I.e don’t pack the components around it too tightly so you
    can hand solder one in as required. Failing that break the pins out
    somewhere.
  4. Is there a reset switch on there? if not is the rst pin broken out?
  5. LEDs: Power? arduino stylee LED tied to a GPIO? If you want to add
    these I would recommend using the same GPIO as a popular arm lib such
    as libmaple
  6. Profit!

BazOn Dec 14, 2012 10:21 AM, “Ben Dooks” bjdooks@googlemail.com wrote:

I’m considering sending the fixed design for manufacture.

There’s a couple of issues.

  1. would people prefer a 500mA capable supply over a 300mA one?
  2. should I replace the mini-usb with micro-usb connector?
  3. anyone have strong feelings about adding a rtc crystal?

–
Ben Dooks, http://www.fluff.org/ben/ bjdooks@googlemail.com

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