2Instructables26,241Views5CommentsRoanoke, VAJoined January 2nd, 2015
Hi! I'm a technology nut, dabbling in everything from mobile electronics to computers to 3D printing to website design and hosting. I work for Gridpoint, an energy management company, and I enjoy riding motorcycles and dedicating time to my church.


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  • Converting 12v/24v power supply to remote (G-code) switching

    It looks like the 1.1 boards had a PSEL jumper to choose whether to power the board's 5v logic from the power supply or the USB, but this is absent on the 1.2 boards. I suggest unplugging the power supply inputs from the board and connecting the USB. This should power the board. If so, then use a volt meter to check to see if 5v is present at pin 1 of any of the following connectors: SPI, ICSP, I2C.If so, you can use this 5v for the relay power and pick up the signal in the PS_ON terminal beside the power inputs. DISCLAIMER: I have no experience using RAMBO boards. This information is provided from examining the schematic at at YOUR OWN RISK!

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