Posted 20 hours ago

Duex Plus Mobile Pixels - Portable Laptop Monitor, 12.5'' Full HD IPS Display, Compatible with Windows/Mac/Chromebook, Lightweight and Easy to Use - Upgrade Your Workstation

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The Duet 2 WiFi and Ethernet supports power distribution to and control of three heaters: a heated bed (assumed to be the highest current draw with a maximum of 18A) and two extruder heaters. These are fed from the 12/24V circuit, but the PWM switching is carried out by MOSFETs on the ground, so if necessary they can be run off different voltages. Very high power bed heaters should probably be supplied independently and switched with a SSR. The Duet boards run on two basic power circuits. The digital electronics are supplied by a 5V circuit, which is internally converted down to the 3.3V levels that drive the MCU. This circuit also drives all the LEDs and sensors, and can be configured to feed the fans. The high-power devices, specifically the stepper motors and the heaters, are powered by a higher voltage, typically 12 or 24 V. This 12/24V circuit can be switched on and off through the PS_ON pin, if the power supply supports this (it may be a good idea to add such support through a relay, for safety reasons, if it doesn't) without interfering with the MCU at all. Alternatively, the Duet boards can draw power from this circuit to power the 5V circuit.

As it goes with some of the portable monitors, this one also doesn’t support ~90 percent of the sRGB color gamut, and you are likely to see a color difference between both the screens. Nevertheless, these external monitors make an excellent option for working on long excel sheets or referencing documents across two monitors. Another way to use 2 PSUs would be to use one to power the bed heater only and the other to power everything else. Duet 2 WiFi and Ethernet boards have four 4mm clearance holes at the corners of the board. You can use M4 screws to attach the board to a panel or an enclosure. The hole patterns / mounting centres are 115mm x 92mm. Giuliano Moschini has created a model based on the Duet 2 WiFi model for the Duet 2 Ethernet available here ¶ Physical connections ¶ Wiring diagram ¶ Revision v1.0 and later DueX5 and DueX2 have undergone a number of minor PCB revisions, from the original release (v0.6) to the current (v0.11). All DueX revisions are compatible with all PCB revisions of the Duet 2 Wifi and Duet 2 Ethernet. • PCB revision v0.11Heaters: Each heater from E2_HEATER to E6_HEATER has a red indicator LED. When lit, the heater is on. If you will be using VIN power greater than 12V and you wish to enable the on-board 12V converter, put a jumper across the 12V_EN PINS Up to 7 additional stepper drivers, of which up to 5 can be TMC2660, as offered by optional DueX5 expansion board

switching regulator, for generating a 12V supply for fans, LEDs etc. when the VIN power is higher than 12V (see Power jumpers notes below). Morten Nielsen has also shared a model of the earlier versions, available here. ¶ Using a DueX5 with External drivers


The Duet hardware and RepRapFirmware are built with Open tools: designed in KiCad and Eclipse using open tools means the barrier to getting involved is as low as possible. Important! The cables must be oriented as shown in the image in the Power wiring section, below. If you have a white pre-production Duet 2 WiFi then the 50-way expansion connector may be fitted the wrong way round, with the keyway on the side next to the edge of the board (wrong!) instead of away from the edge (correct). To fit the cable, you will need to file down or cut off the protruding key on the cable end. ¶ Power ¶ Power distribution

on-board I/O connectors for endstop and filament monitors (STP pins are 8V-tolerant on revision 1.04 and later), 7 more on expansion header In practice, though, the Duex disappoints. Its attachment mechanism is fiddly and inconsistent, build quality isn’t great, and the display’s poor quality means it’s only suitable for basic tasks and indoor environments. At this price, that’s not good enough.Up to 7 external stepper drivers when not using Duex expansion board. Signal levels are 3.3V. A 5-channel expansion breakout board is available to level shift them to 5V.

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