Arduino Pro Mini adapter card and nice box from "biltema"

[fot]

Yes, I'm using 2x1.5V and it seams to work well..

The card uses around 30uA (+- the precision of my multimeter) in idle/sleep and that should give a pretty long run time on batteries.

I have nodes that has been online since before Christmas and still going strong.

/Magnus

[bjornhallberg]

I think I looked at that box the last time I was at Biltema but I never got around to buying them. The ones I got from Ebay are ok, though a bit bulky in retrospect, plus the screws rust like crazy. So I'll pick up a couple of these next time. Can never have enough boxes.

[Stric]

Same card, different box (slightly too small). I cut the LED after taking the picture..

[gadu]

Where can one find these boards?

[fot]

@gadu said:

Where can one find these boards?

Hi, I developed the boards to fit my own needs.

Currently I don't have any spare but will order more shortly.

/Magnus

[Mickey]

can you share this board schematics?

[gadu]

When you order, lägg till 5st ;)

[Dirk_H]

@fot said:

Yes, I'm using 2x1.5V and it seams to work well..

The card uses around 30uA (+- the precision of my multimeter) in idle/sleep and that should give a pretty long run time on batteries.

I have nodes that has been online since before Christmas and still going strong.

/Magnus

Have you something else connected than Arduino and NRF? Any Sensors or Powersupply? I got down to below 4uA with Atmega and NRF sleeping, measured with Agilent precision desktop multimeter. (Nothing else connected because it was a remote with only buttons). If you have your ATMega in deepsleep you should have less than 10uA (datasheet says so). Just seeing that you use the Arduino Pro Mini. I used dedicated ATMega w/o Arduino HW... Anyways 30uA is also quiet good I think. it should give you more than a year stand by time (theoretical).
(800mAh Battery / (30uA circuit + 30uA self discharge) /24h = 555 days)

[fot]

@gadu

Sure.

/Magnus

[fot]

@Mickey said:

can you share this board schematics?

Sure,

I have some improvements that I need to sort out first but I'm not
intending to make money from this it's for my personal benefit.

/Magnus

[fot]

@Dirk_H said:

@fot said:

Yes, I'm using 2x1.5V and it seams to work well..

The card uses around 30uA (+- the precision of my multimeter) in idle/sleep and that should give a pretty long run time on batteries.

I have nodes that has been online since before Christmas and still going strong.

/Magnus

Have you something else connected than Arduino and NRF? Any Sensors or Powersupply? I got down to below 4uA with Atmega and NRF sleeping, measured with Agilent precision desktop multimeter. (Nothing else connected because it was a remote with only buttons). If you have your ATMega in deepsleep you should have less than 10uA (datasheet says so). Just seeing that you use the Arduino Pro Mini. I used dedicated ATMega w/o Arduino HW... Anyways 30uA is also quiet good I think. it should give you more than a year stand by time (theoretical).
(800mAh Battery / (30uA circuit + 30uA self discharge) /24h = 555 days)

The regulator on the pro mini is still connected it might drain some uA still.
I just removed the power led from the board.
I had one DS18b20 connected at the time of measuring.

When i hit 30uA I did not dig any further into it.

I have > 800mAh batteries so I will get > 2 years of operation.

Might do some more analysis of it later on.

/Magnus

[ahhk]

Hi,

would u share / show the schematic? I actually do the same: A small battery-powered "Baseplate" for the pro mini and a NRF24l01. But i wanted to use a HT7733 instead of HT7133 and definitivly NO SMD parts :)

greetings

Andreas

[fot]

@ahhk said:

Hi,

would u share / show the schematic? I actually do the same: A small battery-powered "Baseplate" for the pro mini and a NRF24l01. But i wanted to use a HT7733 instead of HT7133 and definitivly NO SMD parts :)

As I wrote before. I have some modifications I like to do before but after that I will probably release the card to the public including Eagle files.

/Magnus

[bjornhallberg]

I went and picked up one of these boxes. As suggested, the box fits perfectly, has clips (no screws), removable terminal blocks and has a nice stylish front that would probably work in most homes.

Thanks again for the tip! At 20 SEK ($2.3) it is quite affordable also. Makes me question 3D printing and CNC routing.

[tbowmo]

I picked up the smaller variant (http://www.biltema.dk/da/Byggeri/El/Elektrikervarktoj/El-dase-35209/?artId=35209)

If it wasn't for that darn screw in the middle, it would be a perfect fit for the Mysensor micro.

I'm thinking about modifying the box, and remove the screw. But then nothing is holding the box together.

/ Thomas

[tbowmo]

just made a box for my serial gateway, with the small variant I mentioned above

[lundebc]

I am wondering if you have done improvements and published this schematic or eagle files? These are exactly as I have been thinking about to make the package better than simply using jumper wires to build my desired sensors. If you published them to OshPark or similar I would definitely buy several.

Regards,

Bruce

[fot]

@lundebc
No, I'm in a "no time left on device" mode right now.

I'm thinking of publishing the eagle files for anyone to use but have not done it yet.

/Magnus