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I have a 5V 2A dew heater band, which is powerd by USB. Do you guys think I can power the band with the USB hub on the back of my 533MC Pro/Laptop USB port? Or is it better to power it through a power bank or phone charger? |
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| Probably worth giving a shot. It can be considered an unpowered hub. If it draws too much you might see problems with cooling not working on the ASI533MC. |
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| @jewzaam I see that if i don't power the camera with the 12v dc the dew heater doesn't work, so I think it's a powered hub. |
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| Great point, I have not run mine w/o power and didn't realize that. So, even better then. I'd go for it. |
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| Don't know why I didn't come up with this idea before as I don't have to use a powerbank anymore and cable managemnt is cleaner. |
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How do you power your guide camera? If you have doubts about powering your dew heater through the 533's hub, you could install a one to two 12v splitter and power both with a single power supply (assuming it is up to snuff) and leave the 533's hub for other tasks (guide camera, focus motor). Jim |
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| @Jim Raskett I don't have any guide camera, focuser or filter wheel and as said before the dew heater is 5V USB, so the 12V splitter would not work. |
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| Personally, I would not try that. On my 5V USB dew heater bands, it is clearly specified that you should not run them from a computer port. They draw a lot of current, are very rudimentary (just a resistor connected to +5V/GND) and may easily short and destroy your 1000 US$ camera. |
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Daniele Borsari: You sure did. Thanks for the correction. If you haven’t imaged yet with this configuration yet, you could test it off-line by doing a simulated sequence or session with the camera cooled while powering the dew heater. That way if there was a problem, it wouldn’t affect an actual session. Jim |
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| I powered mine off my ASIAir. Had no issues. |
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| @Jim Raskett Thank you. I've already imaged with this setup, but my cables were probably pulling the camera and the tracking was a bit inconsistent. I'm doing some cable management and powering the dew heater directly from the camera helps. @DoctorJB Thank you for your opinion. |
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Damien Galanaud: There is a controller between the heater and the USB connector, but don't know how it works. |
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| I have the Svbony dew heater and I can only use the low and medium setting. Once I go high the dew heater shuts off. I am cooling at -10c . My asiair powers the camera, Eaf, efw and Avx mount. |
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Yes, It is possible to power a USB-dew heater from the 533 as long as the power consumption doesn't exceed the maximum rating for the USB-port or the total consumtion exceed the maximum rating for the setup. Garanteed output for Usb 2.0 is max 500mA (x5V = 2,5W) and Usb 3.0 max 900mA (x5V = 4,5W) per port. I've noticed that cheap cables simetimes have way to high resistance and creates power loss and unwanted heat ( in the wrong places 😀 ) But even if you can power the heater from the camera USB make sure that it is a quality heater as if it shortens the port isn't well protected and you may end up burning one or both ports (have happened to others). |
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Hello Didn't work for me! I have solved it like this - (plastic ammunition box) 12V 30A connections for Asiair Mount Heater band works fine...      BG & CS Andreas |
