Closed B4stl3r closed 1 year ago
the noise is on the Gbuf not in the channel try GND to input and LR with ceramics
Hi, here's a quick drawing of my connections:
The GND (on Line In) of the PAM is directly bridged to the GND of the power supply. so there's no need to put another GND wire there..
also just verified, the DGND Pin of the VS1053 has connection to the GND of the PAM.
Can you run the esp32 from the 3.3 v VS1053 rail?? Because i belive that is where the stuff commes from 2 different 3.2 step down converter BTW in audio circuts you should always connect the wire on input. the less resistance to gnd the better. Make sure u use thick wires on power supply.
The VS1053 has a 3.3V Rail ? Thought it requires 5V to run (at least the board)?
Or do you think about grabbing the convertet 3.3V after the "onboard" regulator from the VS Board?
Can it handle the additional Load from the ESP ?
Esp it self runs on 3.3v if u connect 3.3v to the 3.3v pin of the board it will run. It shud be able to handle it.
You can google the max currents the components draw and what the regulator can deliver
sure the esp will run on 3.3, but what you had in mind with the 3.3v rail of the VS ?
Regulator is a ams1117 t33 f16lc http://www.advanced-monolithic.com/pdf/ds1117.pdf should be safe to handle the esp in addition, as output is 1A.. correct?
how did you power esp and vs ?
high all i am 99% sure using Isolated DC/DC Converters like B0503S will kill this noise please see https://www.youtube.com/watch?v=n_b_0BWP0mI i am looking to find this converter in market
Yes, but they are usually only 1 Watt. If you can find a 3 Watt type it will certainly work.
just use 600:600 transformers.. what works totally fine!
no need for a B0503S, but could indeed also work.
is that possible to use it in digital side? (esp + vs1053 + tft)
what? the transformers or the DC/DC ?
I use a 12V Powersupply with a Stepdown for ESP + VS, the Audio between VS and the Amp are isolated with the transformers.
Using a TFT shouldn't make any difference.
dc/dc in my previous project i made a fm radio and clock with tft-when using radio with showing clock on tft can hear noise when second or minute or every thing else make changes on tft
Hi,
I used the schematics from https://github.com/Edzelf/ESP32-Radio/issues/66 and also used the transistors.
I still have some "white noise" left, which might come from the ESP itself. https://electronics.stackexchange.com/questions/368867/esp32-microcontroller-generates-noise-on-microphone You can hear it very clearly until ~30% of max volume..
I tried serveral things, from using 2 different power supplys, also both of the VS1053 Lineout solution (which still has then the white noise issue). https://www.sparkfun.com/datasheets/Widgets/MP3Trigger/vs10XXan_output.pdf Also tried several different amplifiers (but all class D)..
Will or want to use the PAM8610 in future.
Do you have the same isse or have any filtering solution inplace ?
Thanks in advance!