EAF and AIR Pro crash

yf222000

Hi everyone. Anyone of you here experienced AIR Pro crashes after installing the newer 5V EAF thing? It starting to happen with my setup randomly. Once polar aligned. Suddenly the whole rig just stops working and can’t control it via the App. All the Camera, Guide Cam, Mount, EAF tabs shows blanks when clicked into. Can’t slew the scope or do anything to it except to hit the power button and cycle power. Happened many times on the same night. Thx in advance.

w7ay

yf222000 Anyone of you here experienced AIR Pro crashes after installing the newer 5V EAF thing?

The Raspberry Pi 4 is spec'ed to supply a maximum of 1.2A total from its USB ports.

I just measured one of my 5V EAFs and when slewing, the EAF is drawing a short term average of 0.24A (I did not put a recording ampmeter on it to measure instantaneous current spikes, but it is probably over 0.25A if ZWO did not use a large enough filter capacitor). I simply use a cheap USB power meter that I got at Amazon.

When quiescent, it draws less than 0.05A.

What is the cumulative current draw from your other devices? If the total is over 1.2A, you will need a powered USB hub (but make sure you use a powered hub that does not back-power the Raspberry Pi -- most of the powered hubs will back-power the USB port of the Raspberry Pi and cause random problems, or even cause the Raspberry Pi not to boot).

I run my USB devices off of a powered hub and have not encountered any EAF problem (I have three of the 5V version, and a couple of the 12V version still in use).

Chen

yf222000

w7ay. Thanks Chen. I have no idea what is the total amp draws on the AIR Pro. The only few things that’s connected to is currently is the main camera’s TEC. The EAF is being powered via main Cam USB hub. I’ll try to relocate the TEC power to an external source to see if this may be the cause. Thanks again.

w7ay

yf222000 The EAF is being powered via main Cam USB hub.

Try relocating that to see if the problem goes away or changes.

Good luck,
Chen