Using an electromagnet with RAMPS What is the best way to connect a 12V electromagnet to RAMPS? Ideally without using D8, D9 and D10. Is it a good idea to use the 12V AUX pins (here marked as extruder fan)? https://reprap.org/forum/read.php?219,567323,567323#msg-567323 Sat, 10 Oct 2026 19:54:01 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?219,567323,568017#msg-568017 Re: Using an electromagnet with RAMPS https://reprap.org/forum/read.php?219,567323,568017#msg-568017 I wouldn't put my money on the durability of this setup, but it's worth a try.
-Olaf]]> o_lampe RAMPS Electronics Thu, 08 Oct 2015 04:08:42 -0400 https://reprap.org/forum/read.php?219,567323,567668#msg-567668 Re: Using an electromagnet with RAMPS https://reprap.org/forum/read.php?219,567323,567668#msg-567668 marsius RAMPS Electronics Wed, 07 Oct 2015 07:41:39 -0400 https://reprap.org/forum/read.php?219,567323,567634#msg-567634 Re: Using an electromagnet with RAMPS https://reprap.org/forum/read.php?219,567323,567634#msg-567634 this

You cant use fan extenders, they are low current devices

You can use D8, D9 and D10, just remove the mosfet and use its as a IO pin to drive the optocoupler

And as already stated you need to deal with the backEMV, or what ever devices you use will die.]]> Dust RAMPS Electronics Wed, 07 Oct 2015 06:01:45 -0400 https://reprap.org/forum/read.php?219,567323,567597#msg-567597 Re: Using an electromagnet with RAMPS https://reprap.org/forum/read.php?219,567323,567597#msg-567597 -Olaf]]> o_lampe RAMPS Electronics Wed, 07 Oct 2015 04:57:09 -0400 https://reprap.org/forum/read.php?219,567323,567429#msg-567429 Re: Using an electromagnet with RAMPS https://reprap.org/forum/read.php?219,567323,567429#msg-567429 Fan Extender it would be possible, right?

Is there another option?]]> marsius RAMPS Electronics Tue, 06 Oct 2015 16:48:47 -0400 https://reprap.org/forum/read.php?219,567323,567397#msg-567397 Re: Using an electromagnet with RAMPS https://reprap.org/forum/read.php?219,567323,567397#msg-567397 enif RAMPS Electronics Tue, 06 Oct 2015 15:00:30 -0400 https://reprap.org/forum/read.php?219,567323,567323#msg-567323 Using an electromagnet with RAMPS https://reprap.org/forum/read.php?219,567323,567323#msg-567323
Ideally without using D8, D9 and D10. Is it a good idea to use the 12V AUX pins (here marked as extruder fan)?]]> marsius RAMPS Electronics Tue, 06 Oct 2015 12:24:20 -0400