💬 Easy/Newbie PCB for MySensors

[Amput]

@ferro said in 💬 Easy/Newbie PCB for MySensors:

@Amput said in 💬 Easy/Newbie PCB for MySensors:

Could anyone explain me, why position (polarity) of condensers 4.7uF on REV 8(blue) and REV 9 (red) are different?

It's a bug in v8 fixed in v9, so v9 is correct, see link this post

Thx for answer :-).

[sundberg84]

@martins - No, not at the moment. It has been asked before but I have never got my head around it.
As i told before, you are happy to develop it yourself. I have some other things in my list but in the future maybe :)

[meanmrgreen]

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[meanmrgreen]

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[N00phi]

Hi
I've tried to order the capaciter and voltage regulator from our local electronics supplier. The choice is too big. Could anyone please help a "newbie" to select the right parts for a raw powered 5V version

• 4.7uF capacitor
• voltage regulator
• 0.1 and 10uF cap
  http://www.distrelec.ch/ can't select the parts because of missing size and especially for the voltage regulator the exact type.

[sundberg84]

@N00phi - I usually just select the ones at www.mysensors.org/store but if you have a specific site you wish to order from I can choose for you.

[N00phi]

@sundberg84 It would be absolutely great if you could do so! I would order at http://www.distrelec.ch ...

[sundberg84]

@N00phi for the capacitors: http://www.distrelec.ch/search?q=electrolytic+capacitor&filter_Rated+voltage~~VDC=50&filter_Diameter+housing~~mm=4&filter_Diameter+housing~~mm=5 (choose the axial types which is the one with two legs).

As for the voltage regulator I use LE33ACZ 5V-3.3V which i cant find on that site.

[dbemowsk]

@sundberg84 said in 💬 Easy/Newbie PCB for MySensors:

choose the axial types which is the one with two legs

Just for clarification, there is axial lead and radial lead components. The axial leads have both wires coming out of one side (as @sundberg84 mentions it looks like two legs). Radial leads have one wire coming out each side. I almost never use radial lead capacitors.

[N00phi]

@sundberg84 Thank you! One more question.. on the photo, there is a flat broun capacitor, what are the specifications for that one? Is it 0,1uF? But thats not an aluminium electrolytic capacitor, is it?
Oh, and the voltage regulator is available on aliexpress, found that one.

[Nca78]

@N00phi said in 💬 Easy/Newbie PCB for MySensors:

@sundberg84 Thank you! One more question.. on the photo, there is a flat broun capacitor, what are the specifications for that one? Is it 0,1uF? But thats not an aluminium electrolytic capacitor, is it?
Oh, and the voltage regulator is available on aliexpress, found that one.

Yes it's the 0.1uF capacitor. It's a ceramic disc capacitor, but you won't have to search for the type of capacitor on aliexpress, low value capacitors are most of the time (always ?) ceramic disks if they are not of SMD type.

[cmrockwell]

I would like to use this PCB with a 3.3V I2C sensor (data line and power must be <3.6V) and AC power. Is there a recommended way to accomplish this?

[sundberg84]

@cmrockwell - Sorry, Im not following...
AC Power? You need some AC-DC converter then and this is not the intend of the PCB, sorry.

[cmrockwell]

@sundberg84
Sorry, I wasn't clear. I just meant running from a DC power supply, not batteries. It seems that the intended use is to have 5V Vcc when running from a power supply, but I would like a 3.3V Vcc. Thanks for your help. I have 10 of these PCBs in hand.

[Nca78]

@cmrockwell You can use a 3.3V / 8MHz pro-mini board and power everything with 3.3V.

[sundberg84]

@cmrockwell - yes, the pcb is designed like @cmrockwell said. You can use either 3.3v or below (batteries) or a 5v regulated voltage. If you choose the 3.3v/bat version you need a 3.3v pro mini.

[cmrockwell]

@sundberg84
OK, I figured out how to do what I wanted. I am planning to connect a regulated power supply that provides ~3.3VDC. The main thing I had to figure out was how to configure the PCB when neither a battery booster nor a regulator are needed. I think either shorting the REG pin and shorting the regulator or shorting the BAT pin and shorting the battery booster would each achieve the desired result.

[sundberg84]

@cmrockwell - well done!
Yes, digging deeper into it you can probably hack it many ways with jumpers and wires.

[gohan]

If I want to use a mini pro 3.3v and a 18650 battery that I have lying around, should I use something like THIS or do you think there is a better/more efficient way?

[sundberg84]

@gohan - im not that good in efficiency in boosters and converting voltage. Im sure that would work! The main thing is 1) deliver correct voltage and 2) if they are to noicy they will interfere with the radio and make the communication fail.