<p>Following on from <a href="https://3dprinting.stackexchange.com/questions/6342/what-level-of-voltage-does-the-creality-ender-3-run-at/6521#comment9993_6521">What level of voltage does the Creality Ender-3 run at?</a></p>

<p><a href="https://3dprinting.stackexchange.com/questions/6342/what-level-of-voltage-does-the-creality-ender-3-run-at#answer-6521">Dave's answer</a> states that both 12&nbsp;V and 24&nbsp;V can be used on the controller board. It also goes on to say that the controller board is used in both configurations in two different printers:</p>

<ul>
<li>Ender 3 and;</li>
<li>CR-10</li>
</ul>

<p>I would like to know how this dual voltage operation works:</p>

<ul>
<li>Does it use both voltages at the same time, or either one or the other? </li>
<li>Are there two different electrical inlets or are they the same?</li>
<li>Does it auto-detect or are there jumpers used to configure or are the components tolerant to both voltage levels? </li>
</ul>

<p>Also related:</p>

<ul>
<li>What is the board used? </li>
<li>Is the board a proprietary design or a standard third party board? </li>
<li>Does anyone have any photos of the board and/or schematics?</li>
</ul>

[{'answer_id': 6533, 'author': '0scar', 'author_id': 5740, 'author_profile': 'https://3dprinting.stackexchange.com/users/5740', 'pm_score': 2, 'selected': False, 'text': '<p>This answer addresses the input voltage. If you look up the official replacement board at the official Creality store the board features a single pair of connectors next to it says: 12 V / 24 V. So you can either use 12 V, or 24 V, not both. An internal regulator will most probably reduce the voltage anyways. </p>\n\n<p><a href="https://i.stack.imgur.com/W1xgl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/W1xgl.png" alt="Detail of the replacement board, single 12/24 V power connector is encircled"></a></p>\n\n<p>Please note that (kindly reminded by user profesor79 through the comments) that the microprocessor on these boards only use 5 V. So any voltage you supply (12 or 24 V), the voltage regulator will always make sure the microprocessor does not get more than 5 V. However, that does not necessarily apply to all peripherals connected to the board! This should be verified if for the peripherals also a voltage regulator is used. One of my own boards, <a href="https://reprap.org/wiki/RUMBA" rel="nofollow noreferrer">the RUMBA board</a> can be fed by any voltage ranging from 12 V - 35 V, but this also applies to the peripherals like the heater cartridge and the fans! I use the RUMBA with a 24 V power supply, so I need to use 24 V fans heater elements and heat bed.</p>\n'}, {'answer_id': 6540, 'author': 'Trish', 'author_id': 8884, 'author_profile': 'https://3dprinting.stackexchange.com/users/8884', 'pm_score': 4, 'selected': True, 'text': '<p>I own the Ender 3, and it runs on 24V, as this photo of the power supply shows:\n<a href="https://i.stack.imgur.com/3VrGx.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3VrGx.jpg" alt="Ender3 Power supply" /></a></p>\n<p>From power supply  to the board, it uses a 2-wire line connected with a XT60 plug/jack that is common on RC cars:\n<a href="https://i.stack.imgur.com/uXc5B.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uXc5B.jpg" alt="XT60 connector on Ender3" /></a></p>\n<p>The board itself is a proprietary design and labeled as &quot;V1.1.2&quot;. The Voltage in is the lowest input on the left:\n<a href="https://i.stack.imgur.com/xQBpB.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xQBpB.jpg" alt="Creality3D V1.1.2" /></a></p>\n<p>The Cooling fan (blue-yellow wire), the hotend cooling fan, heater cartridge (white shielded), bed heater (left black-red), board cooling fan (middle red-black) run (in this setup) on 24V. The Logic connectors (black-black &amp; White-white) run 5V logic. I could not figure out the voltage of the stepper motors (upper row).</p>\n<p>I have not figured out how the power management circut works, but it achieves this:</p>\n<ul>\n<li>Supply voltage <span class="math-container">$ U_S = 12\\ \\text V \\lor 24\\ \\text V $</span></li>\n<li>Logic Voltage <span class="math-container">$ U_L = 5\\ \\text V $</span></li>\n<li>Sensor Voltage <span class="math-container">$ U_{sens} = U_L$</span></li>\n<li>Hotend Cooling Fan <span class="math-container">$ U_{cool} = U_S$</span></li>\n<li>Hotend Heating Cartridge <span class="math-container">$ U_{hot} = U_S $</span></li>\n<li>Heatbed <span class="math-container">$ U_{bed} = U_S $</span></li>\n</ul>\n<p>The chip\'s caption can\'t be read on the photo, but it is labeled as &quot;Δ ATMEL // ATMEGA1284P // AU 1726&quot;</p>\n<p>For the pinout, a <a href="https://www.chaos-drucker.de/anleitungen-und-tutorials/creality-ender3-mit-marlin-ausstatten/" rel="nofollow noreferrer">german maker</a> did determine, that it the configuration of a <a href="https://github.com/Lauszus/Sanguino" rel="nofollow noreferrer">Sanguino</a> equipped with an Atmega1284P 16Bit works for compiling firmware and flashing via a bootloader.</p>\n'}]
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