PSU wanted

[Graham J]

This is for a Port Designs Ergo Station II with 4 Port USB Hub, see:

https://www.amazon.co.uk/Port-Designs-Ergo-Station-Grey/dp/B000XWZZ4Q

The PSU has been lost.

I can't find any specification so I don't know the voltage, whether ac
or dc, pin polarity, etc. - nothing. If somebody has one of these and
can tell me what is written on the PSU I can improvise ...

TIA

[Theo Markettos]

Post by Graham J
https://www.amazon.co.uk/Port-Designs-Ergo-Station-Grey/dp/B000XWZZ4Q
The PSU has been lost.
I can't find any specification so I don't know the voltage, whether ac
or dc, pin polarity, etc. - nothing. If somebody has one of these and
can tell me what is written on the PSU I can improvise ...

Since it's just a USB hub, it's likely to be 5V DC.

A simple check on polarity would be to check for continuity between the
inlet and the shell of a USB plug. My guess would be it's a barrel
connector with centre positive/shell negative. Probably 2.1mm or 2.5mm
barrel (they're annoyingly hard to tell apart).

Since it's 4 port, get one with at least 4A and that should be enough for
most USB devices.

Theo

[Graham J]

Post by Theo Markettos

Post by Graham J
https://www.amazon.co.uk/Port-Designs-Ergo-Station-Grey/dp/B000XWZZ4Q
The PSU has been lost.
I can't find any specification so I don't know the voltage, whether ac
or dc, pin polarity, etc. - nothing. If somebody has one of these and
can tell me what is written on the PSU I can improvise ...

Since it's just a USB hub, it's likely to be 5V DC.
A simple check on polarity would be to check for continuity between the
inlet and the shell of a USB plug. My guess would be it's a barrel
connector with centre positive/shell negative. Probably 2.1mm or 2.5mm
barrel (they're annoyingly hard to tell apart).
Since it's 4 port, get one with at least 4A and that should be enough for
most USB devices.

I took it apart. The pcb has what looks like a regulator chip and a big
diode so it probably wants about 9v dc and might tolerate polarity
reversal. There's also a transistor and a chip with about ten leads per
side. So a bit more reverse engineering and I will get there ...

[Dr J R Stockton]

Post by Graham J
I took it apart. The pcb has what looks like a regulator chip and a
big diode so it probably wants about 9v dc and might tolerate polarity
reversal. There's also a transistor and a chip with about ten leads
per side. So a bit more reverse engineering and I will get there ...

The "transistor" could be a three-pin voltage regulator. I suggest that
you give us (and Google-search) the part numbers of anything that looks
like a semiconductor, but perhaps not the "date" indicator (I cannot
recall what those looked like, and have not seen any with post-1999
notation).

[Graham J]

Post by Graham J

Post by Theo Markettos

Post by Graham J
https://www.amazon.co.uk/Port-Designs-Ergo-Station-Grey/dp/B000XWZZ4Q
The PSU has been lost.
I can't find any specification so I don't know the voltage, whether ac
or dc, pin polarity, etc. - nothing. If somebody has one of these and
can tell me what is written on the PSU I can improvise ...

Since it's just a USB hub, it's likely to be 5V DC.
A simple check on polarity would be to check for continuity between the
inlet and the shell of a USB plug. My guess would be it's a barrel
connector with centre positive/shell negative. Probably 2.1mm or 2.5mm
barrel (they're annoyingly hard to tell apart).
Since it's 4 port, get one with at least 4A and that should be enough for
most USB devices.

I took it apart. The pcb has what looks like a regulator chip and a big
diode so it probably wants about 9v dc and might tolerate polarity
reversal. There's also a transistor and a chip with about ten leads per
side. So a bit more reverse engineering and I will get there ...

Found one which gives 9v at 850mA and has the correct barrel plug - so
using that.

Thanks for all the help.