Here is a picture of my Megatronics V2 board from the bottom
[attachment 32913 01013736-2.jpg].
What you are seeing is apparently an interrupt controller called IC2 on the Sainsmart Megatronics V2.
FYI: it has been widely documented that the Sainsmart Megatronics board does not tell you the order of the min max end stops. And a few have burn the boards completely (http://forums.reprap.org/read.php?219,160740,261843#msg-261843 http://forums.reprap.org/read.php?219,160740,301598#msg-301598) Orienting the USB input to your bottom left and looking at the board from the top, the end stop pins should be S - + from left to right. If you connect them backwards (+ - S) and press the switch, your IC2 and perhaps others stuff might burn as well.
I am trying to find out what exactly is damaged in the board and if possible replace the interrupt. So far everything works. However fro those of you that have this board from Sainsmart I need you to do me a two favours.
1) can you tell me if you can power the board with only the power supply unit connected and no USB cable hooked up? I don't recall if it was able to do so but now I need to have a USB cable for the board to start and the PSU for everything to move and work properly. (The PSU alone won't turn the board on)
2) can you tell me the information on top of the interrupt controller named IC2, or send a picture where I can read it? The heat burned the cover and I have no way of reading the name from the top.
Marcelo R G
[attachment 32913 01013736-2.jpg].
What you are seeing is apparently an interrupt controller called IC2 on the Sainsmart Megatronics V2.
FYI: it has been widely documented that the Sainsmart Megatronics board does not tell you the order of the min max end stops. And a few have burn the boards completely (http://forums.reprap.org/read.php?219,160740,261843#msg-261843 http://forums.reprap.org/read.php?219,160740,301598#msg-301598) Orienting the USB input to your bottom left and looking at the board from the top, the end stop pins should be S - + from left to right. If you connect them backwards (+ - S) and press the switch, your IC2 and perhaps others stuff might burn as well.
I am trying to find out what exactly is damaged in the board and if possible replace the interrupt. So far everything works. However fro those of you that have this board from Sainsmart I need you to do me a two favours.
1) can you tell me if you can power the board with only the power supply unit connected and no USB cable hooked up? I don't recall if it was able to do so but now I need to have a USB cable for the board to start and the PSU for everything to move and work properly. (The PSU alone won't turn the board on)
2) can you tell me the information on top of the interrupt controller named IC2, or send a picture where I can read it? The heat burned the cover and I have no way of reading the name from the top.
Marcelo R G