Ramps v1.4 unable to powered without usb and lcd flickers without showing anything January 21, 2016 01:59AM |
Registered: 8 years ago Posts: 41 |
Re: Ramps v1.4 unable to powered without usb and lcd flickers without showing anything January 21, 2016 02:28AM |
Admin Registered: 13 years ago Posts: 7,005 |
Re: Ramps v1.4 unable to powered without usb and lcd flickers without showing anything January 21, 2016 02:34AM |
Registered: 10 years ago Posts: 14,672 |
Re: Ramps v1.4 unable to powered without usb and lcd flickers without showing anything January 21, 2016 06:16AM |
Admin Registered: 13 years ago Posts: 7,005 |
Re: Ramps v1.4 unable to powered without usb and lcd flickers without showing anything January 21, 2016 03:43PM |
Registered: 10 years ago Posts: 14,672 |
Quote
Dust
The mega2560 regulator is meant to be a NCP1117ST50T3G, its meant to be good for 1A
Re: Ramps v1.4 unable to powered without usb and lcd flickers without showing anything January 21, 2016 06:43PM |
Admin Registered: 13 years ago Posts: 7,005 |
Re: Ramps v1.4 unable to powered without usb and lcd flickers without showing anything January 22, 2016 05:46AM |
Registered: 10 years ago Posts: 14,672 |
Re: Ramps v1.4 unable to powered without usb and lcd flickers without showing anything January 23, 2016 02:20AM |
Registered: 8 years ago Posts: 41 |
Quote
Dust
What I do know from real world practical experience is that there are thousands of people happily running standard 20x4 and 128x64 on the ramps, with no power issues. (including myself)
But that’s its limits, adding a servo does seem to take it over the top.
Re: Ramps v1.4 unable to powered without usb and lcd flickers without showing anything May 31, 2017 07:59AM |
Registered: 8 years ago Posts: 2 |
Quote
dc42
This isn't a fault with your Mega, it's a design flaw in the Arduino/RAMPS/LCD ecosystem. The Arduino can only provide enough 5V power to drive small LCDS with modest backlight current requirements. Likewise it can't provide enough power to drive a servo. Workaround is to provide external 5V power, or use an Arduino variant that can provide more 5V power.