Setting the power source for Megatronics 3

Megatronics v3 has three power circuits: one for the heaters,fans, stepper motors etc, one for the heated bed and a 5V logic circuit to power the microprocessor. By factory setting, the 5V circuit is powered from USB, so when you plug in USB the LEDs will turn on. If you want to print stand-alone for example, there is no USB connection, so you need to switch to input power. Megatronics can accept anything between 12V and 24V as input power. The board will down-convert this to 5V for you, you only need to set the power source. This is done using the JP5V jumper, which is located near the USB port.

As you can see in the image, the jumper header has three pins: 1 - I (nput) - 2, When 1-I are bridged, the board will user 12-24V input, when I-2 is bridged, the USB input is used.

Related questions

Why ReprapWorld?
  • Dispatch same business day!
  • 2.000+ products available from stock
  • More than 25.000 satisfied customers in over 40 countries
  • Secure payment for all payment options
  • Professional tech support (over 9 years 3D experience)
25.000+ satisfied customers

4.3 stars on Google

Pay safely using

About ReprapWorld

ReprapWorld is the number one webshop for all your reprap supplies for your 3D printer. We have a large collection of 3D printer components, from our famous electronics lines to filament from our own production. And everything is at a very competitive price!


RepRapWorld B.V.
Wagenmaker 6a
2631RL Nootdorp
The Netherlands

Tel: +31 (0) 85 - 009 15 31

Copyright 2009 - 2019 | ReprapWorld B.V.