💬 Button size radionode with sensors swarm extension

[chbla]

@gohan I only have a normal multimeter - what's the best way to do this?
I came across https://www.eevblog.com/projects/ucurrent/ a while ago, is it worth it?

[gohan]

There is a project in openhardware for a current meter if you want to build one, or you could buy a newer multimeter if the one you have can not measure uA

[yury]

@chbla said in 💬 Button size radionode with sensors swarm extension:

multimeter

You should be fine even with a cheap multi-meter as long as it has uA scale.

should be around 7-10 uA and if you do not send JDEC to sleep it is 17 -19 uA.

to send JDEC to sleep\wakeup I use
_flash.wakeup();
_flash.sleep();

light sensor should be sent to sleep explicitly also.

[gohan]

@yury not really, I have bought an Aneng cheap multimeter, but if I connect it with uA scale selected it will go out of range during node boot and cut the circuit making measurement impossible (unless you do something fancy that would make it unpractical)

[yury]

@gohan said in 💬 Button size radionode with sensors swarm extension:

selected it will go out of range during node boot and cut the circuit making measurement impossible

my cheap one survives 20mA surge (RFM69 CW version) of initial communications and displays good reading afterwards. if you burned fuse inside, try replacing it temporarily with some thin wire for this uA tests.

[gohan]

I have another cheap one that works. I didn't blow the fuse since turning it off and on it works again, it must be a software limitation

[chbla]

@yury said in 💬 Button size radionode with sensors swarm extension:

@chbla said in 💬 Button size radionode with sensors swarm extension:

multimeter

You should be fine even with a cheap multi-meter as long as it has uA scale.

should be around 7-10 uA and if you do not send JDEC to sleep it is 17 -19 uA.

to send JDEC to sleep\wakeup I use
_flash.wakeup();
_flash.sleep();

light sensor should be sent to sleep explicitly also.

Right - but this is all in your sketch right? This is what I used:
https://gist.github.com/solars/a5302f1cb60d90f89d7e37d5e23f8c4d

[chbla]

@Koresh would it be possible to sell this without the sensor part and RFM69? How many orders would it need?
I don't have the possibility to produce it myself, don't need the sensors part and have a lot of RFM69s lying around..

Thank you,
Christoph

[anovak]

I downloaded gerber files.
Error Message from PCB Manufacturer:
The NC drill layer does not match with the pads of copper layer.

Thank you,
Attila

[Koresh]

@anovak
Hello. Do you mean main board or rfm69 adapter? It is very strange. I produced exactly these gerbers many time. :thinking_face:

[Koresh]

Finally I have a little time to continue this project...
High efficient dc-dc converter works nice and double cr2032 are good. Lets go to the furher tests! :face_with_cowboy_hat:

[anovak]

Thanks. The problem was solved.
Manufactured at very low cost on pcbway, they are manufactured with "Min Track / Spacing: 5 / 5mil".
Do you have any idea where they are manufactured cheaper?

[Koresh]

New version with double battery holder and power convertor works nice.
Power consumption in sleep mode is less than 9uA :smiley:

I will test it soon..

[alexsh1]

@koresh You only have two sensors BH1750 and Si7021. Did you try to have all four sensors and measure consumption?

[anovak]

Which pcb manufacturer do you recommend?
I asked for a quote from Pcbway but it was expensive.
The reason was:
Change the 'Min Track / Spacing' value from 6 / 6mil to 5 / 5mil.

Sorry for my bad English.

[Koresh]

@anovak Unfortunately you can reduce the price of the board only if you order more boards.

[anovak]

What price can be made in 10 items?

[gohan]

@anovak if you mean 10K maybe you can have a discount :sweat_smile:

[anovak]

10 would be needed for the current project
At pcbway, the total cost of production and shipping costs is $ 34.
Is there someone who does it at a lower price?
Business account required.

I apologize for asking this question in this topic.
What type of transformer do you use and where to get it for the Mini Relay Box?

[Omemanti]

@anovak do you want them completely assembled?

Yesterday I ordered 2 plain PCB's from seeedstudios, cost me 20 dollars incl, shipping. paid more for shipping than for the PCB's themselves. :)

but for the size, these units are you can get 6 or more in one design.