Hi,
I'm hoping that this is a simple question to answer. Although I'm not a technical ignoramus, I know very little about power or cabling, so I would like some advice with what I'm trying to do!
What I need is:
- PORTABLE (i.e. non-mains) 5V DC power into 'Device A' and
- PORTABLE (i.e. non-mains) 12V DC power into 'Device B'
What I have at my disposal (so far) is:
- A mains adapter for 'Device A' that seems to output 5V at up-to 2A via a small-ish DC power jack (3mm outside diameter, I think)
- A mains adapter (arriving in the post tomorrow) for 'Device B' that should output 12V at up-to 500mA via a suitably-sized DC power jack
- A 'rechargeable laptop battery pack', that can output 12V DC via a number of different jacks, and 5V DC via a USB cable. (details here: formatting link
What I originally wanted to do was to power both devices from the 'rechargeable laptop battery pack'. But the only 5V output from that is via a USB cable, which will not fit the device that needs a 5V input.
I cannot use either of the mains adapters, so I need to get DC power from the 'rechargeable laptop battery pack' (or some equivalent).
So what should I do? I have a few ideas, but I'm not sure if they are any good:
(a) Could I somehow construct a USB-to-DC power jack for the 5V power? I'm not sure such a thing exists to buy, but how difficult would it be to construct?
(b) Could I split the 12V output to two destinations (1) 'Device B' directly; and (2) 'Device A' via some way of converting it to 5V? How would I do this?
I'm sure what I'm trying to do shouldn't be too difficult. But I'm just not sure how to do it, and I don't want to damage my devices or start a fire or electrocute myself. So any advice would be appreciated!
Thanks,
David
P.S. In terms of getting hold of kit to do this, I'm UK-based, so ordering from UK companies would work best for me.