<p>Given that the capacitor near the input is quite clearly marked 35&nbsp;V, a 36&nbsp;V rating seems questionable.</p>

<p>The (buck) regulator used on the (genuine version of the) board is the <a href="http://www.aosmd.com/res/data_sheets/AOZ1282CI.pdf" rel="nofollow noreferrer">AOZ1282CI</a> which supports up to 36&nbsp;V input. This is probably where they got the 36&nbsp;V rating from, but obviously the 35&nbsp;V-rated capacitors drop the input voltage down below this.</p>

<p><a href="https://reprap.org/mediawiki/images/f/fa/Re_ARM_Schematic.pdf" rel="nofollow noreferrer">Schematics for the board are available on the RepRap wiki</a> and show that the input voltage only feeds into the regulator. I see no reason why this board couldn't handle 24&nbsp;V input, as this is well within the rating of both the regulator and the capacitors.</p>

CC BY-SA 4.0
2019-07-15T09:28:32.687Z
2019-07-15T09:28:32.687Z
Tom van der Zanden
<p>For completion, I've just seen this, <a href="https://www.reddit.com/r/3Dprinting/comments/9wfrmk/can_a_ramps_16_support_24v/" rel="nofollow noreferrer">Can a ramps 1.6 support 24v?</a> (which basically confirms the 24&nbsp;V support of the Re-ARM board) although it isn't particularly useful w.r.t. the RAMPS 1.6 side of things, although I would imagine the the <a href="https://reprap.org/wiki/RAMPS_24v" rel="nofollow noreferrer">24&nbsp;V RAMPS hack</a> would still apply.</p>

<p>In addition, Alex Kenis does a great review, and he has successfully tried it with 24&nbsp;V, watch <a href="https://www.youtube.com/watch?v=P-wekOqM5gY" rel="nofollow noreferrer">32-bit series part 4: Re-ARM board "review?"</a>. Whilst the RE-ARm offers a lot of advantages, some of the main down points to be aware of are:</p>

<ul>
<li>No 5&nbsp;V <em>analogue inputs</em>, they are 3.3&nbsp;V, so the endstops use 3V3 logic (not a problem from mechanical switches, but 5&nbsp;V optical endstops will have a problem</li>
<li>Some of the pins of the Mega are missing from the Re-ARM.</li>
</ul>

CC BY-SA 4.0
2019-07-15T11:10:27.653Z
2019-07-15T18:45:24.527Z
2019-07-15T18:45:24.527Z
Greenonline
<p>I would like to make a 24&nbsp;V (3D printer board and shield) setup, as opposed to the usual 12&nbsp;V, and to do so I had been considering using the Taurino Power board, or the clone Eruduino. However, I just found this board:</p>

<p><a href="https://i.sstatic.net/FoUYh.jpg" rel="nofollow noreferrer" title="Re-ARM microcontroller, with SD card slot"><img src="https://i.sstatic.net/FoUYh.jpg" alt="Re-ARM microcontroller, with SD card slot" title="Re-ARM microcontroller, with SD card slot"></a></p>

<p>The specifications state a DC input of up to 36&nbsp;V:</p>

<p><a href="https://i.sstatic.net/UX1QF.png" rel="nofollow noreferrer" title="Specifications"><img src="https://i.sstatic.net/UX1QF.png" alt="Specifications" title="Specifications"></a></p>

<p>Does anyone know whether that <em>really</em> means it can handle 24&nbsp;V in the same manner as the Taurino/Eruduino? If so, then that looks like a double win: not only 24&nbsp;V support, but also a faster processor. Anyone have experience with this board?</p>

<p>I was thinking of using with a RAMPS1.6 Plus (maybe), or just a regular RAMPS 1.4 (<a href="https://reprap.org/wiki/RAMPS_24v" rel="nofollow noreferrer">hacked to support 24&nbsp;V</a>). I'm just shopping about, and I thought that if I was going to spend £14 on an Eruduino, then I just as well spend that money on something better.</p>

<p>It does work with Marlin apparently, as some of the customer reviews would suggest, but none of the reviews that I could find referred to a 24&nbsp;V setup (heated bed etc.), hence my question.</p>

<printer-building><power-supply>
Is this re-Arm controller actually 24 V capable?
Greenonline
# Is this re-Arm controller actually 24 V capable?

(Asked by: username_0 on 2019-07-15)

I would like to make a 24 V (3D printer board and shield) setup, as opposed to the usual 12 V, and to do so I had been considering using the Taurino Power board, or the clone Eruduino. However, I just found this board:

[![Re-ARM microcontroller, with SD card slot](https://i.sstatic.net/FoUYh.jpg "Re-ARM microcontroller, with SD card slot")](https://i.sstatic.net/FoUYh.jpg "Re-ARM microcontroller, with SD card slot")

The specifications state a DC input of up to 36 V:

[![Specifications](https://i.sstatic.net/UX1QF.png "Specifications")](https://i.sstatic.net/UX1QF.png "Specifications")

Does anyone know whether that *really* means it can handle 24 V in the same manner as the Taurino/Eruduino? If so, then that looks like a double win: not only 24 V support, but also a faster processor. Anyone have experience with this board?

I was thinking of using with a RAMPS1.6 Plus (maybe), or just a regular RAMPS 1.4 ([hacked to support 24 V](https://reprap.org/wiki/RAMPS_24v)). I'm just shopping about, and I thought that if I was going to spend £14 on an Eruduino, then I just as well spend that money on something better.

It does work with Marlin apparently, as some of the customer reviews would suggest, but none of the reviews that I could find referred to a 24 V setup (heated bed etc.), hence my question.

**Tags:** printer-building, power-supply

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## 2 answers

### Answer by username_1 on 2019-07-15. Score: 4 | Accepted answer

Given that the capacitor near the input is quite clearly marked 35 V, a 36 V rating seems questionable.

The (buck) regulator used on the (genuine version of the) board is the [AOZ1282CI](http://www.aosmd.com/res/data_sheets/AOZ1282CI.pdf) which supports up to 36 V input. This is probably where they got the 36 V rating from, but obviously the 35 V-rated capacitors drop the input voltage down below this.

[Schematics for the board are available on the RepRap wiki](https://reprap.org/mediawiki/images/f/fa/Re_ARM_Schematic.pdf) and show that the input voltage only feeds into the regulator. I see no reason why this board couldn't handle 24 V input, as this is well within the rating of both the regulator and the capacitors.


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### Answer by username_0 on 2019-07-15. Score: 2

For completion, I've just seen this, [Can a ramps 1.6 support 24v?](https://www.reddit.com/r/3Dprinting/comments/9wfrmk/can_a_ramps_16_support_24v/) (which basically confirms the 24 V support of the Re-ARM board) although it isn't particularly useful w.r.t. the RAMPS 1.6 side of things, although I would imagine the the [24 V RAMPS hack](https://reprap.org/wiki/RAMPS_24v) would still apply.

In addition, Alex Kenis does a great review, and he has successfully tried it with 24 V, watch [32-bit series part 4: Re-ARM board "review?"](https://www.youtube.com/watch?v=P-wekOqM5gY). Whilst the RE-ARm offers a lot of advantages, some of the main down points to be aware of are:

* No 5 V *analogue inputs*, they are 3.3 V, so the endstops use 3V3 logic (not a problem from mechanical switches, but 5 V optical endstops will have a problem
* Some of the pins of the Mega are missing from the Re-ARM.


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