Battery based atmega328p sensor (no SMD)

[alexsh1]

@scalz I suggest we move this discussion to http://forum.mysensors.org/topic/3309/powering-nodes-3-3v-with-18650-26650/2

6 x 1.5V LR14 on Amazon are £7 meantime 26650 3.7V 5000mAh is £9. Obviously one needs 2 for a project so its it £2.2 vs £9, but I am looking at it from a different angle. 26650 is a universal buy for me as well as an investment - I can power a project with, say, a motor or solenoid or connect a solar panel to charge the battery.
This is just my 2 cents

[GertSanders]

This post is deleted!

[alexsh1]

@GertSanders I really like this board - you are getting better and better! :)
You have now EEPROM? And the LED now on D5? You really like changing LED pin. :)

Somebody was asking for PIR on the slim node.
Well, another teaser from me using previous version of your board (AA battery compartment and I am altering STL file to have it also for AAA battery case).

[alexsh1]

@GertSanders What are you planning to use for SJ4 and SJ5? Soldering or switches? I was thinking about the following:

http://www.aliexpress.com/item/50pcs-lot-Micro-Switch-Button-On-Off-Switch-Tact-Push-Button-Switch/32386813536.html?spm=2114.10010108.1000013.1.Za0nJ0

[GertSanders]

@alexsh1
SJ4 and SJ5 are solderingpads. I find that I do not change the function of the node once it is set up. No point in using switched, when the switch action only happens once.

[alexsh1]

@GertSanders i know you have not done testing but can you give up heads up when you share it on oshpark - very keen to test it myself. Dank je

[GertSanders]

@alexsh1

Some pins moved again. I have not yet ordered this, I normally sleep on it for a few days, then check again, and if I feel OK that no more details need to move, I will trigger an order and share. I'll let you know when that happens.

I'm still wondering whether I should put soms test-pads in place, to allow ISP programming of a bootloader after the mcu is put in place. It would require some round test-pads on the bottom. I will think about this tomorrow after I have slept on it.

UPDATE: found a small error in my schematic: C10 is not needed. So rerouting will be needed, I want this location for something else.

[GertSanders]

@alexsh1

board is ordered and shared from OSHPark: https://oshpark.com/shared_projects/2uuSjIIQ

[alexsh1]

@GertSanders said:

@alexsh1

board is ordered and shared from OSHPark: https://oshpark.com/shared_projects/2uuSjIIQ

Thanks for this! Can you please share the BOM file?
I placed my order already!

[GertSanders]

@alexsh1

I will add it on OpenHardware.io

[GertSanders]

@alexsh1
In what capacity do you get the AA size LiFeP4 batteries ?

[alexsh1]

@GertSanders said:

@alexsh1
In what capacity do you get the AA size LiFeP4 batteries ?

@GertSanders
OK, I have a couple of 14500 LiFeP4 3.2V each. They are only 600mA. They are not my favourite though. I also have (1) lithium rechargeable AA 1500mA 1.5V (charging 5V from USB) and (2) NiZn AA 1.6V 2200mA - these are my favourite so far.

The problem for me is that my new charging device has not arrived yet from China and I cannot charge NiZn. I have discharged a few and did not a chance to charge them

[gloob]

Is there a case/housing available instead of printing an own one?

[GertSanders]

@gloob

No, this board was not made for a specific housing. It just fits the dual AA(A) battery holders.

[gloob]

Thanks for your feedback. Do you have a link for a AA battery holder? I could only find AAA holders with pins.

[alexsh1]

@gloob have you tried to use google? There are plenty of 2xAA holders on eBay as well.

http://uk.farnell.com/keystone/2462/battery-holder/dp/1702630

[gloob]

When you read the data sheet correctly you can see, that the distance between the pins is different for a AA and AAA battery holder. That`s why I was asking if somebody can recommend a holder that fits.