PDB and LED Hum...

[PrhapsiSuppose]

Hi All, first time poster here!
So I just did a brand new build. This is my 3rd Quadcopter build and my goal this time around was to keep things pretty clean. Anyway, both previous Quads (RIP), when plugged into the battery and lights made literally no sound at all. This new one has an electric hum to it. If I turn the LED's on, it gets louder and changes frequency.

Both previous Quads were Diatone Blade 250s with built in PDBs. I used LD Power 2204-2300kv Motors and 15A ESC's.
On my two previous builds, the ESC's were the LDPower brand that came as a kit with the motors. A crash blew one of the ESC's up, so I swapped them all out for "Hobbymate" 15A ESC's off Amazon.
That wouldn't cause them hum would it?
It almost sounds like it comes from the PDB, and then also from the LED's themselves if they're on.
This is my first time using an external PDB and it certainly made things interesting!
I included photos for fun. It still needs some tucking and stuff done, I did a lot of heat wrapping this time around and what a pain in the...

 

[Wildwelder]

Hello and welcome to the forum. Now Im gonna be honest here and say that theres alot of sharper guys on here when it comes to electronics, but I will say this: Ive always used 20a esc's with 2204's and Ive never had a problem. Ive used 15a with 3100kv's on a 150. Do you notice anything getting real warm or hot?

 

[RENOV8R]

It's possible you may be experiencing high voltage power spikes, particularily if this is only happening when your quad is sitting with no throttle applied. You could try adding a capacitor to the Vbatt connections of your PDB and see if that smooths things out. They're cheap and available at any electronics store. I haven't needed one on any quad, but they were pretty well mandatory on any RC car I owned.
https://www.amazon.com/gp/product/B...age_o00_s00?ie=UTF8&psc=1&tag=viglink20264-20

 

[PrhapsiSuppose]

Hello and welcome to the forum. Now Im gonna be honest here and say that theres alot of sharper guys on here when it comes to electronics, but I will say this: Ive always used 20a esc's with 2204's and Ive never had a problem. Ive used 15a with 3100kv's on a 150. Do you notice anything getting real warm or hot?

I dont notice anything really heating up. When I ran them before they were also on 15A ESC's and they were great, but i wonder if 20A esc's would be worth it.

And i will check those out RENOV8R thank mates!