Help me validate an #electronics #3dPrinting hack for my SV06.
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wrote last edited by [email protected]
Help me validate an DIY #electronics / #3dPrinting hack for my SV06.
It has an annoying issue: if USB is plugged into the mainboard but the power supply is switched off it will be in a half on state: MCU will report ready to Klipper from the USB voltage. I want to fix this: on/off at the power switch, nothing between.
My plan: put a 24v relay on the "normal fan port" that controls the 5v USB line.
1/2
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replied to Kyle Davis last edited by
This port turns on as soon as the board gets PSU power and isn't controlled by the MCU at all.
24v power flows to the coil, current flows in the USB, powering the board. 24v ends, the coil turns off and also the board.
I was thinking of doing this as an inline USB so it's reversible.
Here are my knowledge gaps:
1) Will USB host freak out if only 5v is cut?
2) Do I need to worry about debouncing?
3) I was looking at something like this part (https://www.digikey.ca/en/products/detail/american-zettler/AZ9571-1C-24DSE/14307592), seems suitable? -
replied to Kyle Davis last edited by
@linux_mclinuxface if I'm understanding you this is just back powering the MCU 5v line via USB. This happens with a number of printers and the usual way to solve it is to cut/fabricate a USB cable without the 5v line connected, then the main PSU for the printer is the absolute arbiter of on/off
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replied to SilentMobius last edited by
@SilentMobius oooh. I can probably try that easily.
