Search found 4 matches

by MARAUDER2003
Fri Jul 24, 2020 4:32 am
Forum: Hardware
Topic: Filtering and reserve capacitors on 3V3 wrover-b module
Replies: 5
Views: 6432

Re: Filtering and reserve capacitors on 3V3 wrover-b module

I thought i upload a screenshot of what I did in KiCad, I had a few boards produced and I'm doing some electrical testing of them. So far, everything is holding good and no need for the extra 22uF cap. I still need more testing though , it's looking like I can remove the cap and make more room in th...
by MARAUDER2003
Tue Apr 21, 2020 4:47 am
Forum: Hardware
Topic: Filtering and reserve capacitors on 3V3 wrover-b module
Replies: 5
Views: 6432

Re: Filtering and reserve capacitors on 3V3 wrover-b module

Yes, that's what I'm going to have to do. I don't have much room for it. I'm going to have to remove something in order to make room for that, at least I'll know it works for sure before anything else. I know this is trivial but this is due to the fact that we're trying to move from an existing desi...
by MARAUDER2003
Mon Apr 20, 2020 2:40 am
Forum: Hardware
Topic: Filtering and reserve capacitors on 3V3 wrover-b module
Replies: 5
Views: 6432

Re: Filtering and reserve capacitors on 3V3 wrover-b module

I'm using a dual layer design (as opposed to the 4 layer recommended one). I designated the top layer 3.3V and the bottom layer Ground, and mounted the ESP on the top power layer. This means the esp32 can just get the power by making the 3v3 pad a solid or thermal relief connection. The DC/DC reacts...
by MARAUDER2003
Sat Apr 18, 2020 12:15 pm
Forum: Hardware
Topic: Filtering and reserve capacitors on 3V3 wrover-b module
Replies: 5
Views: 6432

Filtering and reserve capacitors on 3V3 wrover-b module

Hello, I’m designing my own PCB, and I’m using the esp32-wrover-b module. My question is about the use of capacitors on the 3V3 line. It appears that this power input must be filtered with a 100nF (0.1uF) capacitor -standard practice. It also appears that a 22uF (or even bigger?) capacitor must be a...