Re: 5V power for UC300ETH
Quote:
Originally Posted by
Titaniumboy
My question is where to safely obtain the 5V to power the UC300ETH. Can I simply use one of the spare leads from the power supply and grab the 5V and GND from there?
Honestly I would use a seperate small 5v supply myself.
You know the board is then kept isolated.
Re: 5V power for UC300ETH
Ethernet is isolated if you will use the computer power supply then you will have no isolation anymore.
Re: 5V power for UC300ETH
dazp1976 and olfCNC,
Thanks for the replies. I was afraid you guys were going to say I needed a separate power supply.
Does this fit the bill? Meanwell RS-15-5. 5V 3A from Amazon for $12.49?
https://www.amazon.com/MEAN-WELL-RS-...ct_top?ie=UTF8
Re: 5V power for UC300ETH
I bought the little Meanwell power supply mentioned in my last post. I finally got the power supply and UCCNC UC300ETH board installed. I applied 240 VAC to the power supply input and left the 5VDC wires unconnected to the UC300ETH .board.
I measured the power supply output at 5.1 VDC, which seems OK.
I then decided to switch my multimeter to the Volts AC scale and I measured a whopping 10.3 Volts of AC. What the heck? Thank goodness I decided to check the AC and DC voltages before connecting the PS to the UC300ETH.
I verified these results with a second multimeter. I should mention that both multimeters are very very inexpensive meters.
Is it just a case of having bought a lemon power supply, or do all these power supplies do this? The Meanwell spec says 80mv of ripple...