virtualdave
Well-known member
Hi all,
Just a sanity check here. I have a project using 2 t3's. Only one needs to be connected to a usb port...the other has some sensor processing off-loaded to it.
Set up:
t3#1 : only has external rs485 chip attached (~2mA)
t3#2 : currently has a ~51mA sensor board attached (t3 providing 3.3V power via its 3.3V pin)
t3#1 gets it's power from the CPU via USB
Question:
Can anyone foresee any issues powering the t3#2 set-up using the 3.3V pin on t3#1? The t3 takes ~31mA@ 96MHz based on a previous post, so total current consumption is ~82mA. This seems a bit close to the 100mA max, so wanted to get some feedback. Once development has ended the entire set-up (both t3's + sensor) will be powered by a regulated 3.3V battery supply...but in the meantime wanted to see if the above set-up was "smart".
Thanks as always,
David
Just a sanity check here. I have a project using 2 t3's. Only one needs to be connected to a usb port...the other has some sensor processing off-loaded to it.
Set up:
t3#1 : only has external rs485 chip attached (~2mA)
t3#2 : currently has a ~51mA sensor board attached (t3 providing 3.3V power via its 3.3V pin)
t3#1 gets it's power from the CPU via USB
Question:
Can anyone foresee any issues powering the t3#2 set-up using the 3.3V pin on t3#1? The t3 takes ~31mA@ 96MHz based on a previous post, so total current consumption is ~82mA. This seems a bit close to the 100mA max, so wanted to get some feedback. Once development has ended the entire set-up (both t3's + sensor) will be powered by a regulated 3.3V battery supply...but in the meantime wanted to see if the above set-up was "smart".
Thanks as always,
David
running for 24 hours and seems to be fine. Was measured closer to 70mA, too.