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Could be just me (probably is just me), but isn't this a bit weird? It stated output is 5V, but GPIO's are 3.3V. So what's ment with output then?
If you supply power via pin 24 (7 - 12V), then pin 21 is 5V regulated output. Or, you can connect 5V power supply to pin 21 (input); then pin 24 is not used.
Hi Stefan,
The "output" power is the power on pin 21 which you can use to power other electronics. We wanted to make sure you could provide a small amount of power to both 5V components (directly from the pin) or 3.3V components (by dropping the 5V to 3.3V through an external power regulator).
The digital output from the IO pins is 3.3V. But they can accept either 5V or 3.3V signals from other devices.
Does that clear things up at all?
Chris
P.S. You can also _power_ the Netduino Mini by feeding 5V to pin 21. It's a pretty flexible little module!
I only noticed the lack of a regulated 3.3V output when starting my first proper Mini project that I'd prototyped using its bigger brother (a Plus). Luckily I was using a 4D uOLED screen which happened to provide a regulated 3.3V I could use.
True, but I needed a small form factor, not ethernet.
Although some day I would love a Plus, there's no need for it now and it costs money!
Stefan,
If you need 3.3v as well on your project. My Netduino Mini Breakout has a 3.3v regulator and provides that supply voltage, and can be used both with the vin and the 5v inputs. As well as powering over USB. A distributor in your neck of the woods will have them in stock in the next few days. The breakout board is ~half the width of the Netduino mini and the same length.
A quick note on my Netduino Mini Breakout boards the current shipping version does not support external power and USB connection at the same time. Doing so can damage your mini.
Netherlands/United Kingdom, doesn't give you additional customs fee. Stays within Europe.
Another voltage question, a bit related.
So;
Digital Outputs give 3.3V
Digital Inputs are 3.3V but also 5V tolerant.
How about Analog Inputs, I guess they measure 3.3V as 100%, but what will happen if they get 5V?
By the way; jeej! I got a mini by mail today. Only need a Plus to gotta catch 'em all
The measured value for 5V input will bee 100% too.
Ok, so if I take a 5V power source, a potmeter, and the analog input, it will go from 0 to 100% and then it will stay at 100%, but it won't be harmed and my fire extinguisher will be unemployed?
if Chris Walker reads this, he knows exactly what I am up to
Ok, so if I take a 5V power source, a potmeter, and the analog input, it will go from 0 to 100% and then it will stay at 100%, but it won't be harmed and my fire extinguisher will be unemployed?
ok cool!
It's not really a Netduino Mini-question but more generic for all Netduino's. The initial voltage question was for the mini though.
Today I got the mini, but also a Danger-shield. I want to see what it does on a netduino, but it operates at 5V. Just want to make sure, before soldering the thing, that no modifications are required.
What does need a "Danger-shield"?
Why it calls as "Danger"?
Should I be scared about?
Stefan, are you a chemist?...I had a breeze by reading "what if I plug +5V...etc"...
Holland is still a safe (and wonderful) place?
Cheers
Biggest fault of Netduino? It runs by electricity.
Stefan, are you a chemist?...I had a breeze by reading "what if I plug +5V...etc"...
Holland is still a safe (and wonderful) place?
Cheers
LOL! This is the Danger Shield
It can help give me (and others) some understanding of things, but since it's Arduino based, it's 5V. I just want to know in advance if I need to make modifications to correct that. Appairently, it won't be a problem except that the analog interfaces will be a bit more sensitive.
Holland will still be safe, I actually have a fire extinguisher in my room
Yep...although naming "danger" a shield...I guess it is far to be encouraging for electronic novices...
Why not "Try-me-shield"?
Would you drive "Danger-car"?
OK, let's close...
Biggest fault of Netduino? It runs by electricity.
LOL! This is the Danger Shield
It can help give me (and others) some understanding of things, but since it's Arduino based, it's 5V. I just want to know in advance if I need to make modifications to correct that. Appairently, it won't be a problem except that the analog interfaces will be a bit more sensitive.
Holland will still be safe, I actually have a fire extinguisher in my room
Don't want to break my netduino offcause, still haven't soldered the parts to the board, so I think I'll wait with that until there's a conclusive answer to this
analog reference: 2.6 - 3.3 VDC max current: 8 mA per pin<br class="auto-style25" style="font-family: Tahoma; font-size: small; ">digital pins 2, 3, 7: 16 mA per pin
analog pins 0-3: 2 mA per pin
microcontroller max current: 200 mA total
