10-07-2016, 01:21 PM
Hello,
I've tried a tone of power supplies and truth to be told, I haven't had issues with reboots or brownouts.
However, I try to keep a 4TB USB drive (Seagate) permanently attached to the board and although it works more or less reliably, I get occasional clicking sounds. I use a dual usb Y cable to power the drive from both USB ports and have measured the current the drive draws. It never exceeds 550mA according to my charge doctor so, I guess it's not consumption the problem here rather than voltage drop.
When the board starts and powers the drive the voltage on the USB ports drops severely (4.65-4.75V - smetimes it goes even lower...) while when the drive reads or writes, I get a voltage on both USB ports of around 4.80V. On teh other hand, when the drive is in standby mode, volatge ranges between 5 and 5.09V.
As I already said, I have tried many power supplies with similar results. I even tried official raspberry pi 3 power supply (5V/2.5A). The best that I have found is a Samsung Tab's PSU rated at 5.1/2A. This seems to be the most stable of all.
I have also powered the board via the Euler bus but I haven't noticed significant voltage rise on the ports that feed the drive.
I'm now considering trying Lenovo's official charger for tablets which provides 5.2V in 2A.
https://nl.aliexpress.com/item/Original-...21206.html
Do you think this will help with my issue? Any suggestions?
many thanks
I've tried a tone of power supplies and truth to be told, I haven't had issues with reboots or brownouts.
However, I try to keep a 4TB USB drive (Seagate) permanently attached to the board and although it works more or less reliably, I get occasional clicking sounds. I use a dual usb Y cable to power the drive from both USB ports and have measured the current the drive draws. It never exceeds 550mA according to my charge doctor so, I guess it's not consumption the problem here rather than voltage drop.
When the board starts and powers the drive the voltage on the USB ports drops severely (4.65-4.75V - smetimes it goes even lower...) while when the drive reads or writes, I get a voltage on both USB ports of around 4.80V. On teh other hand, when the drive is in standby mode, volatge ranges between 5 and 5.09V.
As I already said, I have tried many power supplies with similar results. I even tried official raspberry pi 3 power supply (5V/2.5A). The best that I have found is a Samsung Tab's PSU rated at 5.1/2A. This seems to be the most stable of all.
I have also powered the board via the Euler bus but I haven't noticed significant voltage rise on the ports that feed the drive.
I'm now considering trying Lenovo's official charger for tablets which provides 5.2V in 2A.
https://nl.aliexpress.com/item/Original-...21206.html
Do you think this will help with my issue? Any suggestions?
many thanks