Hello everybody, I bought a reprap kit two weeks ago composed by all the mechanics fully assembled, an arduino Mega 2560, a RAMPS 1.4 shield and a XBOX PSU 203W and a relay. I have some little experience with arduinos and electronics but it's the first time I have to work with a relay... I connected everything according to the documentation furnished by the seller but I'm not sure at all that's correct, the documentation I received is not enough detailed (for me... ;)). I'm able to upload to arduino only when the RAMPS 1.4 shield is removed. When I connect the RAMPS, it's impossible, arduino tells me the com port is already in use.Actually I would like to be sure of my connections and the fact that I have to remove RAMPS shield to be able to upload to my arduino is not a good thing I guess...:/ I joined the documentation I received and the plan to show you how I connected things.. Thanx to take look... I can't wait to print things O_o Regards Manu https://reprap.org/forum/read.php?219,296742,296742#msg-296742 Thu, 05 Mar 2026 19:22:12 -0500 Phorum 5.2.23 https://reprap.org/forum/read.php?219,296742,305926#msg-305926 https://reprap.org/forum/read.php?219,296742,305926#msg-305926 I doubled up the yellow wire to the relay, and when I turn on the heatbed I can hear the click and it perfectly works :) ... it even turns on my beautiful red led ;) ...by the way, the leds which turns on is upside, but I have another led downside (of the heatbed), what is its function? ... so now I have a (last?) problem, but it's about motors, so I'm going to create a new topic for it.
Thanx again
:)
manu]]> uman RAMPS Electronics Tue, 04 Feb 2014 08:23:45 -0500 https://reprap.org/forum/read.php?219,296742,304522#msg-304522 https://reprap.org/forum/read.php?219,296742,304522#msg-304522 cat.farmer RAMPS Electronics Sat, 01 Feb 2014 15:02:24 -0500 https://reprap.org/forum/read.php?219,296742,304515#msg-304515 https://reprap.org/forum/read.php?219,296742,304515#msg-304515 bobc RAMPS Electronics Sat, 01 Feb 2014 14:56:01 -0500 https://reprap.org/forum/read.php?219,296742,304453#msg-304453 https://reprap.org/forum/read.php?219,296742,304453#msg-304453 sorry not to have responded earlier, I was quite busy on other stuffs, and finally decided to order a new RAMPS 1.4 , and with this new one it connects perfectly :) ... one problem resolved. Now, the only last problem (for the moment ;) ) is the relay.. I know you said it can work without, but because I bought it and it was tested with, I would like to use it anyway. So, if you or anybody else could watch the attached file and tell me if how I connected the relay and the xbox PSU is the right way, it would be great :) ... and maybe soon I'll be a printer :)
Thanx
manu]]> uman RAMPS Electronics Sat, 01 Feb 2014 13:03:20 -0500 https://reprap.org/forum/read.php?219,296742,296985#msg-296985 https://reprap.org/forum/read.php?219,296742,296985#msg-296985 ohm meter should read one way but not the other.

[reprap.org]]]> cat.farmer RAMPS Electronics Sat, 18 Jan 2014 08:47:15 -0500 https://reprap.org/forum/read.php?219,296742,296825#msg-296825 https://reprap.org/forum/read.php?219,296742,296825#msg-296825 hmmm, before that, I'm going to check what you said with the Ohm meter...but what is D2, and how to know if it's shorted...(sorry, newbie here) :S]]> uman RAMPS Electronics Sat, 18 Jan 2014 00:54:10 -0500 https://reprap.org/forum/read.php?219,296742,296804#msg-296804 https://reprap.org/forum/read.php?219,296742,296804#msg-296804 by backwords I mean negitive to positve - positive to negitve]]> cat.farmer RAMPS Electronics Fri, 17 Jan 2014 23:36:27 -0500 https://reprap.org/forum/read.php?219,296742,296781#msg-296781 https://reprap.org/forum/read.php?219,296742,296781#msg-296781 thanx for the reply :) ...okay, I disconnected everything from the ramps, I try to upload to arduino----> it doesn't upload [avrdude: stk500_2R_ReceiveMessage() : timeout]. I removed the ramps----> I can upload to arduino .... :/
What do you mean by the power "backwards"?
ok, good to know about the relay...]]> uman RAMPS Electronics Fri, 17 Jan 2014 21:20:43 -0500 https://reprap.org/forum/read.php?219,296742,296758#msg-296758 https://reprap.org/forum/read.php?219,296742,296758#msg-296758 Did you happen to connect the power backwords at some point?
Also i'm not sure you need the relay with the ramps board, not a bad feature to help not desroy things, but the heatboard could be connected to the ramps directly. I'm sure someone will correct me if I'm wrong.]]> cat.farmer RAMPS Electronics Fri, 17 Jan 2014 19:36:39 -0500 https://reprap.org/forum/read.php?219,296742,296742#msg-296742 https://reprap.org/forum/read.php?219,296742,296742#msg-296742 I bought a reprap kit two weeks ago composed by all the mechanics fully assembled, an arduino Mega 2560, a RAMPS 1.4 shield and a XBOX PSU 203W and a relay. I have some little experience with arduinos and electronics but it's the first time I have to work with a relay... I connected everything according to the documentation furnished by the seller but I'm not sure at all that's correct, the documentation I received is not enough detailed (for me... ;)). I'm able to upload to arduino only when the RAMPS 1.4 shield is removed. When I connect the RAMPS, it's impossible, arduino tells me the com port is already in use.Actually I would like to be sure of my connections and the fact that I have to remove RAMPS shield to be able to upload to my arduino is not a good thing I guess...:/
I joined the documentation I received and the plan to show you how I connected things..
Thanx to take look... I can't wait to print things O_o
Regards
Manu]]> uman RAMPS Electronics Fri, 17 Jan 2014 18:36:50 -0500