What power do you u...
 

What power do you use for Kordbot?  

 

(@raybeck)
Joined: 2 years ago
Posts: 1
04/09/2017 2:52 am  

I just received my Kordbot and there aren't any power adapter or cables included.
I was hoping to use one of my power adapter but the input only reads 9-12V DC.

I'm worried I might break my Kordbot if I plug in a power adapter with a reversed polarity and what the recommended amperage is.
Has there been any announcements regarding this matter?


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(@tepporuokosalmi)
Joined: 2 years ago
Posts: 5
08/09/2017 5:46 am  

Same question here. Sadly the Kordbot doesn't seem to be usable via USB-power (at least it doesn't finalize the boot sequence, stays on white screen with all buttons lit), so the polarity would now be key information (in my case, for a computerless setup).


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(@tepporuokosalmi)
Joined: 2 years ago
Posts: 5
08/09/2017 5:59 am  

Here's what i got, using a DC-adapter with selectable voltage. It puts out 300-600 mA and i tested 7.5V - 12V. Polarity was outer minus, inner plus.
The Kordbot powered up on all voltages, but was stuck at the same point as with USB-power. White screen with all the buttons lit.


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 Bill
(@bill)
Joined: 2 years ago
Posts: 21
12/09/2017 3:58 pm  

I found this out like 1 day before leaving for KnobCon. Sadly, the STM USB driver just happily reports no errors no matter what happens. So I'll have to "fix" their code as soon as I can. The problem is that it starts USB and sits there waiting forever for an acknowledgement from a USB host which isn't there...

In the meantime, there is a workaround or two. Not a great thing to have to do but one of them should work. Requires an SD card be in the KordBot. It will skip the USB booting unless it finds a specific file on the SD card. If that file isn't there, it will boot in power only mode. But it does require a KordBot system disk. Note that when the USB boots, the splash screen only shows the KordBot logo. When USB is disabled you will see the ISLA Instruments logo as well...

1): Obviously, just make sure to connect to a device that knows what USB MIDI is. I have used a PC under Windows 7 and an Android tablet.

2): Same as above, but then go into the File Manager and insert an SD card. Mount the drive then select "Format card". After that, select "Create System card". Finally, go into the Settings menu and uncheck "Start USB on boot". Then power down and connect to a USB power-only device, keeping the SD card in the slot.

3): You can create the SD card on another computer. Obviously a complex series of things to do, but here goes:
a): Format the SD card as a FAT32 (although I believe 16 also works) with the volume name of "KORDBOT SYS". Once that exists, create two folders in the root: KORDBOT and USERDATA.
b): In the KORDBOT folder, create 2 sub-folders, AUTOLOAD and SYSDATA
c): In the USERDATA folder, create a folder called PROJECTS.
d): In the USERDATA/PROJECTS folder, create a sub-folder named CATEGRY0
e): Done 😀
f): With no power to the KordBot, insert the SD card and plug it into a power only USB (or use a center positive 9-12v DC power supply).


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(@petzoospain)
Joined: 2 years ago
Posts: 1
12/09/2017 4:40 pm  

Great Bill, it runs !!
Was frustrating waiting to the computer to detect the usb while waiting in a blank screen..


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(@djdrdru)
Joined: 2 years ago
Posts: 3
30/09/2017 5:37 pm  
Posted by: Bill

... Then power down and connect to a USB power-only device, keeping the SD card in the slot...

How does it "power down" or even power up? Do I simply disconnect the power cable while it is running? Is there an on/off button or procedure?


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(@djdrdru)
Joined: 2 years ago
Posts: 3
04/11/2017 2:27 pm  

Ok well it's been a month since I asked, so I guess it's safe to assume "power down" means disconnecting the power supply. Are there any circumstances under which this would be a bad idea?


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Bradministrator
(@bradholland)
Admin
Joined: 2 years ago
Posts: 65
06/11/2017 1:56 pm  

yup, that's right. just unplug it, that will be fine. 

most buss powered midi controllers are like this, Novation Launchpad, M-Audio controller keyboards etc. 

 

cheers!

 


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Bradministrator
(@bradholland)
Admin
Joined: 2 years ago
Posts: 65
06/11/2017 1:56 pm  

yup, that's right. just unplug it, that will be fine. 

most buss powered midi controllers are like this, Novation Launchpad, M-Audio controller keyboards etc. 

 

cheers!

 


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(@kaatu)
Customer
Joined: 2 years ago
Posts: 1
19/12/2017 4:09 pm  

I'm using a Moog Moogerfooger power supply (9V, 400mA, plug 5.5x2.1 mm, center/inner positive). 


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(@coradias)
Joined: 2 years ago
Posts: 1
21/03/2018 12:29 pm  

Hi...i am a new user here. I used DC adapter and It puts out 300-600 mA and i tested 7.5V - 12V. Polarity was outer minus, inner plus.
The Kordbot powered up on all voltages, but was stuck at the same point as with USB-power.


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(@rchrdk)
Joined: 2 years ago
Posts: 4
01/04/2018 11:44 pm  

I have a power supply for my ableton push 2 that outputs 12v/1000mA.  It fits in the socket but I haven’t tried it yet. Think I can safely use it to power the KB?

cheers


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(@rchrdk)
Joined: 2 years ago
Posts: 4
01/04/2018 11:44 pm  

I have a power supply for my ableton push 2 that outputs 12v/1000mA.  It fits in the socket but I haven’t tried it yet. Think I can safely use it to power the KB?

cheers


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(@djdrdru)
Joined: 2 years ago
Posts: 3
02/04/2018 1:22 pm  

Yes, if it's center positive.


jszack1 liked
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(@oldgearguy)
Joined: 2 years ago
Posts: 18
03/04/2018 7:47 am  

One thing to note - if your voltage is high, you might be putting a strain on the voltage regulator inside the Kordbot. If you can find a 9v adapter (500 mA or more), that would probably extend the life of the Kordbot. It can handle it (for example, a positive 5 volt regulator LM7805 is rated to handle input voltages between 7 and 25 volts), but any excess is dissipated as heat. Note that you need to supply some voltage above the minimum for it to properly regulate, and since the Kordbot folks say 9-12v, it's probably using a 5v regulator.

All just a guess of course since it seems that Brad and Bill only hang out on Facebook these days.


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