💬 MyMultisensors

[particle]

Hello, this is really an excellent sensor!
I would like to buy the components for this project, but I do not know which to choose precisely: when I am looking for a capacitor 100n pack 0603 I have 16 V, 20 V, 15%, 20% etc ...
Do you have a list of references to help us?
Thanks !

[scalz]

I'll put stl for box soon, i need to check few things, and i'm busy.

As i've no time for the moment to upload a complete list with manufacturer parts etc.. it's a 3.3v board without regulator, so with passive >6V (for the 100uF for instance) you should be fine. So for others, 16v etc is enough. Rule i use in general, is 2x what my boards need ;)

[particle]

Thanks, and is it OK if I buy 16V for the passive too ?
Like this one http://www.conrad.fr/ce/fr/product/457889/Condensateur-cramique-CMS-0603-Kemet-C0603C104K4RAC-01-F-16-V-10-X7R-1-pcs?ref=searchDetail for the 100nF for instance.

[Nca78]

Yes it's OK to buy 16V. And it should be a rule to buy x7r, so you should be good with those.
But for big values capacitors (used as power reserve), try to take as low voltage as possible on your circuit as leakage is proportionnal to rated voltage.

[particle]

Thank you so much, so I will buy 16V for 1u capacitor or more, and 6.3V for others.
And is there a rule for active ? (Watts, volts, amps...)

[Nca78]

@particle said:

Thank you so much, so I will buy 16V for 1u capacitor or more, and 6.3V for others.

No, it's the opposite :D
The higher the voltage rating, the more leakage/losses you will have. It's not important for small capacitors, but for reserve capacitors like 100µF it's better to take as low as possible, basically 2x the voltage used on your board.
Honestly it's not a big issue if you use 16V instead of 6V, but with a board as optimized for battery life as this one, it would be sad not to optimize the capacitors also ;)

[particle]

OK understood, it's clear now ! :-)
And yes with the optimization work, I would like to pay tribute to him!
And is there a rule for active ? (Watts, volts, amps...)

[scalz]

Hey!

Sorry for being so late, too much pending projects :)

but here is how looks the custom box for my project. I need to polish a few things, especially sort of mounting plate, then i'll release my stl.

Box is 62x29x 11.6mm
No nails no screws.
i don't like to search my screwdriver or needing screws, or a shorting circuit screw.. So when i can i prefer snaps!

And in real

See you soon!

[tonnerre33]

@scalz Very good work dude ! What about de V2 ? because i want to build this awesome node but i have read somewhere, you are working on the V2 ;)

[scalz]

oki.
v2 won't be released soon (not this month sure) because i miss time, also it's not mysensors compatible yet. and not rfm69 too ;)

[tonnerre33]

@scalz Oki. And for the nrf24 version ? :)

[Koresh]

Unfortunately this circuit and pcb contain a little mistake in reverse polarity protection module. Q1 must be connected as on the following diagram

So just reverse connections of drain and source of Q1, and the next version of your board will contain correct reverse polarity protection :wink:
PS
Otherwise your circuit will be powered through mosfet body diode (with a drop to ~0.6V of course) when polarity is crossed. :anguished:

[scalz]

@Koresh thx for feedback :+1: Files are now updated and added a note

@tonnerre33 sorry for late reply. yes this will be nrf24 compatible, not rfm69. i'll try to show something soon, time does not help me!

[tonnerre33]

@scalz nrf24 for the V1 or V2? Because if V2 isn't mysensors compatible, i prefer use V1 but in nrf24 version ;)

[Yeitso]

So there is no option yet to order complete boards with components in place from manufacturarer? Or am i not getting openhardware correct. Order 10 PCBs will just get me the pcb right?

[tonnerre33]

@Yeitso you are right, 10pcbs order will just give you the pcb ;)

[tonnerre33]

I'm finalizing the nrf24 version because it's a nice board, that would be too bad for nrf24 user

Did you finish the nrf24 version @scalz ?

[scalz]

@tonnerre33 sorry for delay. yep, sure i finished it a while (rev 1.1 nrf), never ordered it, i use rfm for this node. but i'll upload this week oki

[tonnerre33]

@scalz Thx a lot ! I tried to replace the transmitter myself but the routing is too hard for me.

I'll try to check the schema before order the board ;)

[Bigbug]

This looks like an awesome unit! Is there a way to buy this with components assembled? Looks like a lot of work to solder all those smds..