My own board (50mm x 30mm)

[GertSanders]

Done, this will be sent to the PCB makers:

Top:

Bottom:

[scalz]

each boards are nice, good work :wink:

[ahhk]

PCBs are ordered (shenzen2u)....i am very curious about it :)

[ahhk]

Update: PCBs are shipped via express... :dancers:

[GertSanders]

Update: this arrived in my mail today:

I also ordered a set from DirtyPcbs, which were ready lastweek monday, but are still on their way to me.
Assembly starts tomorrow :-)

[ahhk]

ok, great :) Lets how they look ready....

[GertSanders]

Here is version 2 of my sensor:

[GertSanders]

This post is deleted!

[ahhk]

Maybe its better to open a new thread for this question? ;)

[GertSanders]

Just realised this. Indeed, I will start a new topic.

[GertSanders]

Second variant with the same board. This one actually sends it's messages better (no more st:fail's):

And it's nice and compact. Now I need to find a nice ventilated little box to protect them from dust.

This board is now tested and shared on OSHPark: https://oshpark.com/shared_projects/unP8BmuI

Component values are mentioned in the brd file. I will add a BOM in Excel format later.

[maciejka]

Really great job!!!

[MikeF]

@GertSanders said:

Now I need to find a nice ventilated little box to protect them from dust.

This might work - it's well ventilated; width & depth OK, but don't know about height.

http://www.ebay.co.uk/itm/291147751395?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

[GertSanders]

My dirty dirty boards have arrived today :-)

I actually received 12 boards, so I can make 24 sensors, great succes :+1: !!!

[Didi]

@GertSanders
Please post the BOM.

[GertSanders]

@Didi Here is the BOM and EAGLE files.
selfcontained low power node v1.csv
selfcontained low power node v1.brd
selfcontained low power node v1.sch

[GertSanders]

Preview of my latest board, waiting for prototypes to test this ....


This is a 50x50mm board with multiple powering options (AA or AAA batteries, direct 3.3 or 5V DC, 4.5-20V DC in, 220V AC) and can fit a GSM module at the same time as the NRF24 radio. Allows 2 variants of I2C connection (SDA and SCL on IO header can be swapped via soldering pads). Room for signing chip and some I2C based EEPROM or FRAM memory. Several connectors for digital pins with power.
Fits into this box:
http://www.aliexpress.com/item/Free-shipping-2-pcs-lot-60-58-28mm-plastic-housing-DIY-project-box-ABS-junction-box/2039860908.html

[Didi]

@GertSanders said:

@Didi Here is the BOM and EAGLE files.

Thank you

[pjeterinfo]

@GertSanders Hi Gert, on the small board, did you soldered C2 and C3 on the bottom or on top just under/in the IC socket?

[GertSanders]

@pjeterinfo On one of the sensors I soldered it on the bottom between the two connectors on the bottom.

For the sensors where I add the batteryholder on the bottom, I do indeed solder these capacitors on topside between the legs of the chip. Later this evening I will make a photo of such a setup.