<p>FWIW, there is (or <em>was</em> - quite a few years ago, I don't know if it still exists) an Arduino Mega 2560 <em>clone</em>, called the <a href="https://reprap.org/wiki/Taurino" rel="nofollow noreferrer">Taurino</a>, that <em>can</em> handle 24 V (12 V up to 35 V, to be precise). The Taurino took its power from the RAMPS board, rather than the usual practice of supplying the Mega board <em>directly</em>.</p>
<p>There was also the <em>Eruduino</em>, and there may be other models now available.</p>
<p>IIRC, the Taurino was useful for handling 24 V heatbeds. Other benefits of using 24 volts over 12 volts include, basically, less (half) current, thinner wires (or less likely to burn out the existing wires), less stress on connectors (where most fires start).</p>
<p>I even made some (really) rough notes about it, at the time, and the required modifications to RAMPS boards, here: <a href="https://gr33nonline.wordpress.com/2019/07/12/double-the-volts-double-the-fun/" rel="nofollow noreferrer">Double the volts... double the fun!</a></p>
<p>The modifications required were two fold:</p>
<ol>
<li>Replace F2, 11 amp polyfuse (PTC), MF-R1100 which is only rated to <em><strong>16 V</strong></em>, with wire, and use inline 24 V fuses on wires to heated bed. Note that F1, the MF-R500 (5A) PTC fuse, may be left as it is rated to <em><strong>30 V</strong></em></li>
<li>Capacitors under the stepper drives should be <em><strong>35 V</strong></em> rated, not <em><strong>16 V</strong></em> which <em>cheaper</em> boards may use.</li>
</ol>
<hr />
<p>That said, 0scar is correct with his note about the Mega being outdated, although the Mega/Taurino would probably be OK for a basic DIY printer.</p>

CC BY-SA 4.0
2024-10-06T13:17:49.220Z
2024-10-06T13:29:10.747Z
2024-10-06T13:29:10.747Z
Greenonline
<p>There's a way to allow you to use your 24V 20A PSU.</p>
<p>Chinese manufacturers are making 0-30V buck converters that can handle several amperes in great quantities and at a very low cost. Just buy one of these. You can adjust the voltage and the current limit with a potentiometer. Set the voltage to something lower so your Arduino can handle it, and set the current limit to let's say 2 amperes so the buck converter won't overheat even if maximum current is taken. Note that the specs of the Chinese buck converters are way overrated, they can't handle the advertised current. As long as you take only an amp or two, it doesn't matter, though.</p>

CC BY-SA 4.0
2024-10-06T18:00:44.763Z
2024-10-06T18:00:44.763Z
juhist
<p>The amperage doesn't matter, but a 24 V is over the specs of the <a href="https://store.arduino.cc/products/arduino-mega-2560-rev3?srsltid=AfmBOor5q1C5pKYELxeVwRYKSOyI24JSE2DPwb76Kjb3bZn8kgKwHzf4" rel="nofollow noreferrer">original Arduino Mega 2560 rev3</a>. The limits are 6-20 V according to the specs.</p>
<p><em>I would like to point out that for a new build you should not use an Arduino Mega 2560 and a RAMPS shield anymore, these are pretty outdated (understatement). There are more modern all in one solutions with more modern microprocessors (namely 32-bit instead of the 8-bit of the Mega 2560).</em></p>

CC BY-SA 4.0
2024-10-06T02:59:30.963Z
So what mainboard would you recommend?
FrancisChristopher W
CC BY-SA 4.0
2024-10-08T08:14:06.607Z
That depends on how much steppers you need. You can Google it, use 32 bit 3D printer controller board. I usually get my parts from typical online websites.
0scar
CC BY-SA 4.0
2024-10-05T21:29:14.273Z
2024-10-05T21:29:14.273Z
0scar
<p>I am planning to make my first printer which is a Prusa i3 MK2 clone and I want to use a 24 V/20 A PSU so that I can do upgrades in the future and I am wondering if there will be problems of using a 24 V/20 A PSU on an Arduino Mega 2560 with a RAMPS 1.6 shield?</p>

<diy-3d-printer><electronics><arduino-mega-2650><power-supply>
Would a 24 V/20 A PSU damage an Arduino Mega 2560?
FrancisChristopher W
# Would a 24 V/20 A PSU damage an Arduino Mega 2560?

(Asked by: username_0 on 2024-10-05)

I am planning to make my first printer which is a Prusa i3 MK2 clone and I want to use a 24 V/20 A PSU so that I can do upgrades in the future and I am wondering if there will be problems of using a 24 V/20 A PSU on an Arduino Mega 2560 with a RAMPS 1.6 shield?

**Tags:** diy-3d-printer, electronics, arduino-mega-2650, power-supply

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## 3 answers

### Answer by username_3 on 2024-10-05. Score: 3 | Accepted answer

The amperage doesn't matter, but a 24 V is over the specs of the [original Arduino Mega 2560 rev3](https://store.arduino.cc/products/arduino-mega-2560-rev3?srsltid=AfmBOor5q1C5pKYELxeVwRYKSOyI24JSE2DPwb76Kjb3bZn8kgKwHzf4). The limits are 6-20 V according to the specs.

*I would like to point out that for a new build you should not use an Arduino Mega 2560 and a RAMPS shield anymore, these are pretty outdated (understatement). There are more modern all in one solutions with more modern microprocessors (namely 32-bit instead of the 8-bit of the Mega 2560).*

> **Comments:**
> **username_0**: So what mainboard would you recommend?  
> **username_3**: That depends on how much steppers you need. You can Google it, use 32 bit 3D printer controller board. I usually get my parts from typical online websites.  

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### Answer by username_1 on 2024-10-06. Score: 3

FWIW, there is (or *was* - quite a few years ago, I don't know if it still exists) an Arduino Mega 2560 *clone*, called the [Taurino](https://reprap.org/wiki/Taurino), that *can* handle 24 V (12 V up to 35 V, to be precise). The Taurino took its power from the RAMPS board, rather than the usual practice of supplying the Mega board *directly*.

There was also the *Eruduino*, and there may be other models now available.

IIRC, the Taurino was useful for handling 24 V heatbeds. Other benefits of using 24 volts over 12 volts include, basically, less (half) current, thinner wires (or less likely to burn out the existing wires), less stress on connectors (where most fires start).

I even made some (really) rough notes about it, at the time, and the required modifications to RAMPS boards, here: [Double the volts... double the fun!](https://gr33nonline.wordpress.com/2019/07/12/double-the-volts-double-the-fun/)

The modifications required were two fold:

1. Replace F2, 11 amp polyfuse (PTC), MF-R1100 which is only rated to ***16 V***, with wire, and use inline 24 V fuses on wires to heated bed. Note that F1, the MF-R500 (5A) PTC fuse, may be left as it is rated to ***30 V***
2. Capacitors under the stepper drives should be ***35 V*** rated, not ***16 V*** which *cheaper* boards may use.

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That said, 0scar is correct with his note about the Mega being outdated, although the Mega/Taurino would probably be OK for a basic DIY printer.


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### Answer by username_2 on 2024-10-06. Score: 0

There's a way to allow you to use your 24V 20A PSU.

Chinese manufacturers are making 0-30V buck converters that can handle several amperes in great quantities and at a very low cost. Just buy one of these. You can adjust the voltage and the current limit with a potentiometer. Set the voltage to something lower so your Arduino can handle it, and set the current limit to let's say 2 amperes so the buck converter won't overheat even if maximum current is taken. Note that the specs of the Chinese buck converters are way overrated, they can't handle the advertised current. As long as you take only an amp or two, it doesn't matter, though.


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