Hi there

I have some weird test results from testing around with my multimeter that I am having a hard time explaining.

Continuity on FC main battery leads:
+ multimeter to + FC and - multimeter to - FC: no beep, OL
+ to - and - to + or "reversed": no beep but shows 0.582 (ohms? kohms?) of resistance
It seems like when I hook up the multimeter to match the polarity, I get no continuity. But when I "reverse" the polarity I get some sort of continuity.

Continuity between + and - of my vtx (RMRC 800mw 1.2 ghz):
Either way I touch the leads, I get a beep and resistance reading of 0.006

My questions:
1) how come the FC has no continuity one way and continuity the other way (unless the no beep on the "reversed" connection signifies no continuity, if so then why is there a resistance reading?)

2) Is it normal for the vtx to have continuity across + and -. In a way it makes sense because there are no physical switches or components preventing the circuit from closing once the power source is connected. I have already powered up the FC and vtx and can confirm everything is working but would still like to know.

Thanks to whoever can help answer

Do you have a capacitor on the battery connection? If I remember correctly, switching polarity on a capacitor will give the two different readings.

No cap that I soldered on as of now but there might be caps built into the flight controller I guess...I thought that the whole cap thing was that it would give you a beep for a second as it charges.

A capacitor charges instantaneously. When you plug in the battery,
the cap will be charged before you can take your hands off the
battery connector. If it didn't, then it wouldn't do any good.

Also, there are small capacitors all over the FC. 

By the way, if you have the polarity reversed on the capacitor
and you plug in a battery, it will blow up; been there, done that.