Gear / Technical Help > Remote Power
Has anyone tried a USB Step Up Voltage cable?
Brian G:
Has anyone tried using a usb 5v step up cable to 9 or 12v, like this one?
https://www.amazon.com/iHomepack-converter-Connectors-Adjustable-Regulator/dp/B07227L38B/ref=sr_1_fkmr2_3?s=electronics&ie=UTF8&qid=1502720482&sr=1-3-fkmr2&keywords=Step+up+cable+%25v+to+6v
rocksuitcase:
Brian,
I read the reviews of that product. No direct experience, but 1 of three reviews says it worked for 1 minute before breaking. He probably tried charging something which required more than 12V.
that said:
What are you trying to power with this? If it is microphones-NO- if it is almost anything else, that may be the deciding factor. as in anything without a huge surge potential (ie printers, vacuums, de-humidifiers surge heavily on start up) should be able to be powered by this thing.
Finally, if it is microphones, kindms gave me this power transformer type box with XLR in/outs which I think steps down, but I will check it tonight.
Brian G:
Nothing for me in particular,.....I see it provides up to 2a of power. I read the reviews too... they look interesting.
H₂O:
It's max current is 2A - it doesn't provide 2A of power - take all these Chinese no-name goods with a grain of salt.
So if the input is rated at 2A @ 5v the output = 10W input (typical max for USB)
assuming a good efficiency across the step up circuit at 85%
total Watts out would be 8.5
at 9v expect no more then 8.5 / 9 = 0.94444 Amps out
at 12v expect no more then 8.5 / 12 = 0.70333 Amps out
Also the circuit would potentially add noise to the power line so take that into consideration as well - depending on your gear on the other end it may become audible
morst:
fantastic points here and I think reasonable calculations.
Let me just re-frame it in terms of MilliAmp draw by moving the decimal point and adding the letter m ...
--- Quote ---at 9v expect no more then 8.5 / 9 = 944.44 mAmps out
at 12v expect no more then 8.5 / 12 = 703.33 mAmps out
--- End quote ---
:cheers:
--- Quote from: H₂O on September 05, 2017, 03:59:59 PM ---It's max current is 2A - it doesn't provide 2A of power - take all these Chinese no-name goods with a grain of salt.
So if the input is rated at 2A @ 5v the output = 10W input (typical max for USB)
assuming a good efficiency across the step up circuit at 85%
total Watts out would be 8.5
at 9v expect no more then 8.5 / 9 = 0.94444 Amps out
at 12v expect no more then 8.5 / 12 = 0.70333 Amps out
Also the circuit would potentially add noise to the power line so take that into consideration as well - depending on your gear on the other end it may become audible
--- End quote ---
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