In order to save what I did in flipanim I must have an account. I tried to register but it asks for an invitation code. I googled it a bit, according to some user comments in flipanim I believe they closed new account registration at the moment.
You can try checking whether the 54v supply has any voltage spikes if you haven't already. 60-to-5 converter is most likely a switching converter and they draw high current instantaneously and can cause spikes if not filtered properly which may affect the functionality. This may not show up in DC voltage measurement, and daisy chained boards may still function if they are filtered well. One of the daisy-chained boards may be causing the disturbance too, and maybe top board is filtered well but bottom isn't for some reason, maybe a soldering error(e.g. filter capscitor ground connection, poor soldering may be conductive but with high inductance, hindering filter functionality). So it is good to check supply quality. Also what do you mean by not powering up? Is 3.3v not working? What about 5v?
I thought your first sentence was serious at first, since it genuinely makes sense to me. If growing a jellyfish causes animal suffering, I can see why a vegan may reject to eat it for ethical reasons.
There is a significant difference. Your fingerprint information is stored on the phone, and you can remove that information anytime you want, even dispose the phone if you have to. In this case a company will have your biometric information and "hopefully" protect it. Because once it is stolen, you cannot change your hand just like you would change your password.
If you are completely new I suggest watching a tutorial. Otherwise some basic tips could be
if oscilloscope has multiple channels, make sure the channel you connected is the channel nel you see on the screen
make sure you did the ground connection. You need to connect both signal and ground tips if the probe
make sure voltage range is fine. If you use a large range in the screen, little amplitude you got may seem like a flat line.
calibrate your probe, if oscilloscope has that option. But an uncalibrated probe doesn't explain flat line, it would explain distorted square wave, for example.
Use another probe. They can get broken. If it is broken all you will see will be the noise the cable pics up like an antenna.
separate the issue. Connect probe ends to a battery with k own voltage and see what you receive. If it doesn't work, you know either probe or oscilloscope is wrong.
List can get longer really, but I think a tutorial and these can go a long way for the beginning.
In order to save what I did in flipanim I must have an account. I tried to register but it asks for an invitation code. I googled it a bit, according to some user comments in flipanim I believe they closed new account registration at the moment.