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esp32 mp3 playback project and code
Embedded

ESP32 MP3 Audio Playback from SD Card

A demo of ESP32 MP3 audio playback using the PCB Artists ES8388 module. The MP3 file is fetched from an SD card connected to the ESP32.

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MIPI DSI interface and differential pairs
PCB Design

MIPI DSI PCB Layout Notes

Some useful MIPI DSI PCB layout notes, guidelines and tips for MIPI DSI systems. Applicable to MCUs such as STM32 and STM32MP1.

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sdram address lines mode register setting
Embedded

SDRAM Byte and Bit Swapping – Can you do it?

SDRAM swapping rules for bit and byte swapping are not usually described clearly for slow SDR memories. Here are some rules for SDRAM chips.

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ESP32 bluetooth audio player project and code
Embedded

ESP32 Bluetooth Audio Player with ES8388 Module

An ESP32 Bluetooth audio player demo project based on the PCB Artists ES8388 and Espressif ESP-ADF framewor

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lipo 1W LED driver schematic to replace AMC7135
Power Supply

Replace AMC7135 – Higher Efficiency and PWM

Replace the AMC7135 constant current 1 watt LED driver IC with something more efficient with PWM brightness control.

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i.MX6 DDR3 byte lane map
Embedded

i.MX6 DDR3 PCB Layout Notes

i.MX6 DDR3 PCB layout can be a difficult task if you are new to routing DDR3 memory chips. Here are some notes on how to do it right.

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esp32 passive poe schematic circuit diagram
Embedded

ESP32 Passive PoE (Power over Ethernet) design with basic schematic

ESP32 with passive PoE is very useful in several applications such as sensor nodes or industrial control units that use power over ethernet.

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schematic vgh vgl vcom avdd voltage tft lcd
Power Supply

Schematic for generating VGH, VGL, VCOM, and AVDD voltage for TFT LCD

Here is a detailed schematic to generate VGH, VGL, VCOM, AVDD, and some other voltage rails needed by TFT LCD panels to function properly.

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STM32 MIPI DSI block diagram
Embedded

Using 4 lane MIPI DSI display with STM32

Can you use a 4 lane MIPI DSI display with a 2 lane DSI host? STM32 series, RT1050, etc tend to have a 2 lane DSI host.

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esp32 ch340 programmer schematic for espressif esp32 esp8266
Embedded

ESP32 CH340 Programmer Schematic

The ESP32 CH340 programmer schematic is described in brief in this article. This can be used for auto-programming both ESP32 and ESP8266.

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