holyguacamole
New Member
Hello All,
I am trying to charge several devices through USB output and trying to select between which device is being charged.
Basically what I need to figure out is that if I have three USB devices plugged in (A,B,C), how can I have my circuit detect when a device is full or empty and switch to the next one in the line. I am using an Arduino Nano to measure and output voltage stored in the batteries to an LCD and was thinking about setting a condition on the current measured in a device to a threshold level and then moving on to charge the next. However, this presents a problem because no two devices will have the same current at an 85% charged level. If anybody has some suggestions about how to solve this problem it'd be greatly appreciated.
I am trying to charge several devices through USB output and trying to select between which device is being charged.
Basically what I need to figure out is that if I have three USB devices plugged in (A,B,C), how can I have my circuit detect when a device is full or empty and switch to the next one in the line. I am using an Arduino Nano to measure and output voltage stored in the batteries to an LCD and was thinking about setting a condition on the current measured in a device to a threshold level and then moving on to charge the next. However, this presents a problem because no two devices will have the same current at an 85% charged level. If anybody has some suggestions about how to solve this problem it'd be greatly appreciated.