Subscribe to Our Newsletter Advertise
Close



Results 1 to 2 of 2

Thread: Power Supply

  1. 10-01-2014, 12:46 AM #1
    aaroncm
    aaroncm is offline
    Student
    Join Date
    Sep 2014
    Posts
    4

    Power Supply

    Can I use a 13.8v 23Amp supply with a Ramps 1.4/Mega board, to power a Prusa i3 with a heatbed?
    Reply With Quote Reply With Quote
  2. 10-01-2014, 06:58 AM #2
    old man emu
    old man emu is offline
    Staff Engineer old man emu's Avatar
    Join Date
    Oct 2013
    Location
    Narellan, New South Wales, Australia
    Posts
    912
    Should be OK. The heat bed wants 12V DC and there is a bit of circuitry on the board that drops the 12V input to 5V to run the rest of the functions. A single extruder i3 needs a minimum of about 15 Amps to operate, so your 23 Amps is plenty good enough.

    If you wanted to, you could drop your 13.8V to 12V by using two resistors wired as shown in the diagram here: http://www.raltron.com/cust/tools/voltage_divider.asp

    When you are using the calculator, try various values for R2 to compute R1 (the numbers are better)

    Old Man Emu
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules