SDS-100 power supply question?
- Thread starter racing1
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None unless you're connecting both to 500 mAh computer USB1 or USB2 type ports.
Then you're supplying the scanner with 1000 mAh which the scanner can peak slightly over that.
Houk
Sent from my Moto G (4) using Tapatalk
Jason Pulliam said that's what he does and i can't figure out why?
It will allow the scanner to charge while on when connected to 2 500 mAh computer/laptop ports.
Houk
Sent from my Moto G (4) using Tapatalk
Why would you connect it to 2 ports?
Because a single 500 mAh port will not supply enough power to charge the battery while the scanner is on.
Houk
Sent from my Moto G (4) using Tapatalk
I see. Thanks for your input.
SlimPikins
Member
I connect mine to both while in my truck. I have so many things running off of the cigarette lighter plug that if I don't I get the low bus warning.
TailGator911
Silent Key/KF4ANC
I first noticed this when I tried to charge my SDS100 via my USB hub on the desk. Everything else on there runs fine - all at the same time - running all the scanners on ProScan and even SDR#, but the SDS would not charge. I can connect with Sentinel and ProScan ok, but I have to keep the Uniden USB cable plugged into one of the outlets directly on the CPU for the SDS to charge while on. It takes about 4 1/2 to 5 hours. I don't have the paperwork on the hub, bought it on eBay. I am curious as to the voltages per outlet. I'm wondering if I should buy a new one with more umph. I saw a heavy duty USB hub at Best Buy last week, had ten outlets. I might check that out.
JD
kf4anc
From a data transfer perspective it could be faster with USB2 (although that depends on the USB hardware in the radio).
From a power supply/charging perspective there should be no difference although I would avoid using a hub unless it's powered (and even then I wouldn't be too sure).
As for speed it's definitely hardware limited from the scanner. See below:
USB Cable: SCANNER
CrystalDiskMark 6.0.0 x64 (C) 2007-2017 hiyohiyo
* * * * * * * * * * * * * Crystal Dew World :*https://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
* *Sequential Read (Q= 32,T= 1) :* * *0.707 MB/s
* Sequential Write (Q= 32,T= 1) :* * *0.655 MB/s
* Random Read 4KiB (Q=* 8,T= 8) :* * *0.654 MB/s [* * 159.7 IOPS]
*Random Write 4KiB (Q=* 8,T= 8) :* * *0.601 MB/s [* * 146.7 IOPS]
* Random Read 4KiB (Q= 32,T= 1) :* * *0.652 MB/s [* * 159.2 IOPS]
*Random Write 4KiB (Q= 32,T= 1) :* * *0.605 MB/s [* * 147.7 IOPS]
* Random Read 4KiB (Q=* 1,T= 1) :* * *0.556 MB/s [* * 135.7 IOPS]
*Random Write 4KiB (Q=* 1,T= 1) :* * *0.540 MB/s [* * 131.8 IOPS]
* Test : 50 MiB [F: 1.3% (98.6/7526.0 MiB)] (x1)* [Interval=5 sec]
* Date : 2018/03/29 14:28:04
* * OS : Windows 10 Professional [10.0 Build 16299] (x64)
Card reader: CARD DIRECT
-----------------------------------------------------------------------
CrystalDiskMark 6.0.0 x64 (C) 2007-2017 hiyohiyo
* * * * * * * * * * * * * Crystal Dew World :*https://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
* *Sequential Read (Q= 32,T= 1) :* * 77.313 MB/s
* Sequential Write (Q= 32,T= 1) :* * *7.288 MB/s
* Random Read 4KiB (Q=* 8,T= 8) :* * *6.477 MB/s [* *1581.3 IOPS]
*Random Write 4KiB (Q=* 8,T= 8) :* * *2.616 MB/s [* * 638.7 IOPS]
* Random Read 4KiB (Q= 32,T= 1) :* * *6.000 MB/s [* *1464.8 IOPS]
*Random Write 4KiB (Q= 32,T= 1) :* * *2.240 MB/s [* * 546.9 IOPS]
* Random Read 4KiB (Q=* 1,T= 1) :* * *5.114 MB/s [* *1248.5 IOPS]
*Random Write 4KiB (Q=* 1,T= 1) :* * *2.229 MB/s [* * 544.2 IOPS]
* Test : 50 MiB [F: 1.3% (97.8/7526.0 MiB)] (x1)* [Interval=5 sec]
* Date : 2018/03/29 14:36:16
* * OS : Windows 10 Professional [10.0 Build 16299] (x64)
Houk
Sent from my Moto G (4) using Tapatalk
What ever you end up with make sure it is a "powered" USB hub and that at least one of the USB ports is rated for charging devices at 1.5 (or 2.1) Amps.
I may be oversimplifying this but you know what? I plug my SDS100 into a 120v, 3A power supply and it charges just fine. I don't worry (and don't care) how much amperage is emanating from my computer USB ports.
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