Search found 20 matches

by unknow005
Sat Dec 03, 2022 7:15 pm
Forum: General Discussion
Topic: WROVER SRAM/PSRAM misunderstanding
Replies: 3
Views: 2236

Re: WROVER SRAM/PSRAM misunderstanding

But still... is the 4 MB of PSRAM maximum which can be addressed by ESP32? Or is the article outdated and is it possible to use all of 8 MB?
by unknow005
Sat Dec 03, 2022 4:12 pm
Forum: General Discussion
Topic: WROVER SRAM/PSRAM misunderstanding
Replies: 3
Views: 2236

WROVER SRAM/PSRAM misunderstanding

Dear community, I allways used ESP32-WROOM module. But some my projects uses video buffers with size in hundreds of kB of SRAM. The SRAM limit of this module is 512 kB which is crazy low. But I came across the ESP32-WROVER module which has the same size of SRAM (512 kB) but it also has PSRAM in mega...
by unknow005
Wed Jan 29, 2020 6:07 am
Forum: ESP32 Arduino
Topic: ESP32 Bluetooth LE - disconnect after 10 seconds
Replies: 0
Views: 2474

ESP32 Bluetooth LE - disconnect after 10 seconds

Dear community, I have working Bluetooth LE code for communication between ESP32 and Android / Windows 10 App. I am using these Arduino libraries: #include <BLEDevice.h> #include <BLEServer.h> #include <BLEUtils.h> #include <BLE2902.h> The only problem is that connection least only 10 seconds. After...
by unknow005
Thu Aug 01, 2019 11:19 am
Forum: Hardware
Topic: Brownout prevention circuit
Replies: 13
Views: 26666

Re: Brownout prevention circuit

Do not worry! You helped me very much. I will find a different LDO by myself - At least I will learn it by myself.
by unknow005
Thu Aug 01, 2019 5:10 am
Forum: Hardware
Topic: Brownout prevention circuit
Replies: 13
Views: 26666

Re: Brownout prevention circuit

Hello,
almoset every regulators have multiple packages. I can customize the PCB. Components may not be available in my country other than in yours.

What about: AP2114-3.3 (SOT-223) ... looks same like LD1117 for me

Thank you.
by unknow005
Wed Jul 31, 2019 1:32 pm
Forum: Hardware
Topic: Brownout prevention circuit
Replies: 13
Views: 26666

Re: Brownout prevention circuit

Dear mikeymoy,

I preferm linear stabilizators because of minimal external components. Which parameter should I look at if I want use it for ESP32?
I need 3.3V with minimal 500mA because I use only Bluetooth LE (no Wifi).

Thank you.
by unknow005
Tue Jul 30, 2019 5:31 am
Forum: Hardware
Topic: Brownout prevention circuit
Replies: 13
Views: 26666

Re: Brownout prevention circuit

Thanks mikemoy, I did not notice that LD1117 is slow. Which cheap 3.3V regulator would you recommend?
by unknow005
Fri Jul 19, 2019 5:34 am
Forum: Hardware
Topic: Brownout prevention circuit
Replies: 13
Views: 26666

Re: Brownout prevention circuit

Thank you pataga.
Large capacitor and slow discharging sounds logically. I do not want to add another component to my circuit. I have added big capacitor because of wifi voltage interference but now I am using only bluetooth so I will remove it. For bluetooth it is useless.
Thanks.
by unknow005
Mon Jul 15, 2019 5:29 am
Forum: Hardware
Topic: Brownout prevention circuit
Replies: 13
Views: 26666

Brownout prevention circuit

Dear community, my ESP32 board reports a brownout detection ONLY while connecting and disconnection it from the power source. I belive my power source has all neccessary components but maybe I miss something? - Power source is standard adapter with output 5V/1A - ESP32 is powered via LD1117 LDO regu...