I'm playing with RAMPS and ATX and i notice a small cosmetic oddity
The situation is as follows:
D1 is removed from ramps.
I have a led to indicate the Standby state.
But when connected as described in the RAMPS wiki. Then there is voltage coming trough USB toward the Standby LED that makes the Led come ON even when the ATX PSU is NOT connected to the mains.
I know I could use a diode, but that would cause a voltage drop for one.
But my actual question is: Is this the correct behaviour?
Ramps WiKi tells me: The VCC pin can be connected to your ATX's 5Vsb to continuously power the Arduino from your ATX power supply. You will want to make sure that D1 is not installed or cut out.
All of this is what I have done. Thing is that I was not expecting voltage from USB to flow into the ATX. Should I just add A 1N4007 diode to block the 5V coming from RAMPS or is there a nicer way to do get around this?
EDIT: minor markup fix to the text.
The situation is as follows:
D1 is removed from ramps.
I have a led to indicate the Standby state.
But when connected as described in the RAMPS wiki. Then there is voltage coming trough USB toward the Standby LED that makes the Led come ON even when the ATX PSU is NOT connected to the mains.
I know I could use a diode, but that would cause a voltage drop for one.
But my actual question is: Is this the correct behaviour?
Ramps WiKi tells me: The VCC pin can be connected to your ATX's 5Vsb to continuously power the Arduino from your ATX power supply. You will want to make sure that D1 is not installed or cut out.
All of this is what I have done. Thing is that I was not expecting voltage from USB to flow into the ATX. Should I just add A 1N4007 diode to block the 5V coming from RAMPS or is there a nicer way to do get around this?
EDIT: minor markup fix to the text.