toothache

ESP32_touch screen_audio development board

Overview

BOM download

PCB_PCB_ESP32_touch screen_audio development board_2022-09-23.pdf

PCB_PCB_ESP32_touch screen_audio development board_2022-09-23.json

PCB_ESP32_touch screen_audio development board_2022-09-23.pcbdoc

Gerber_PCB_ESP32_touch screen_audio development board.zip

Schematic_ESP32_touch screen_audio development board_2022-09-23.pdf

SCH_ESP32_touch screen_audio development board_2022-09-23.json

ESP32_touch screen_audio development board_2022-09-23.zip

61732

ESP32_PICO_D4+ST7735 development board V3

Introduction: ESP32_PICO_D4+ST7735 development board V3

Using ESP32-PICO-D4 main control chip, CP2102 serial port chip, small TF card slot, ceramic WIFI antenna, reserved IPEX antenna base, TYPE-C interface, ST7735 color LCD screen (resolution 160*80), interface All lead out, four-layer board design.
Front:
Back:
Plug-in card:

Combination with I2S AUDIO SHIELD Working effect:

Pictured with GBRL control board:
Combination:
I2S AUDIO SHIELD_V3 Address: https://oshwhub.com/yiplay/pcb_esp32_pico_d4_shield_v3

14cc4e03e2d95e20a841b9fe209ca800.mp4

BOM download

PCB_PCB_ESP32_PICO_D4+ST7735 development board V3 four-layer board_2022-09-23.pdf

PCB_PCB_ESP32_PICO_D4+ST7735 development board V3 four-layer board_2022-09-23.json

PCB_ESP32_PICO_D4+ST7735 development board V3 four-layer board_2022-09-23.pcbdoc

Gerber_PCB_ESP32_PICO_D4+ST7735 development board V3 four-layer board.zip

Schematic_ESP32_PICO_D4+ST7735 development board V3_2022-09-23.pdf

SCH_ESP32_PICO_D4+ST7735 development board V3_2022-09-23.json

Sheet_1_2022-09-23.schdoc

61733

HOMEKIT single switch accessories based on ESP8266

Introduction: HOMEKIT single switch accessory based on ESP8266, which can be installed in the ceiling lamp.

HOMEKIT single switch accessory based on ESP8266, the control pin is GPIO12, the indicator pin is GPIO13, and the function key pin is GPIO0.
The switching power supply used in this version has been removed from Taobao. You can modify the pad position according to the pin position of the power module used.

Firmware:
The firmware has been uploaded. Burn the three files according to the address. Sonoff_OFF.bin and Sonoff_ON.bin are the status of the control pins after power on. Select according to actual needs. Warehouse address: https://github.com/Gruppio/Sonoff-Homekit
WiFi hotspot without password, HOMEKIT configuration code: 11111111.

firmware.rar

BOM download

PCB_PCB_HOMEKIT_Sonoff_ESP8266_2022-09-23.pdf

PCB_PCB_HOMEKIT_Sonoff_ESP8266_2022-09-23.json

PCB_HOMEKIT_Sonoff_ESP8266_2022-09-23.pcbdoc

Gerber_PCB_HOMEKIT_Sonoff_ESP8266.zip

Schematic_HOMEKIT single switch accessories based on ESP8266_2022-09-23.pdf

SCH_HOMEKIT single switch accessories based on ESP8266_2022-09-23.json

Sheet_1_2022-09-23.schdoc

61734

I2S AUDIO SHIELD_V3

Introduction: An expansion board designed for the ESP32 PICO D4 development board with lithium battery power supply and I2S audio power amplifier function

An expansion board designed for the ESP32 PICO D4 development board with lithium battery power supply and I2S audio power amplifier function.
The charging chip is the commonly used TP4056. Due to size limitations, large batteries cannot be used, so the charging current must be limited through R1.
The audio chip is MAX98357AETE, which is small and can set the gain and select the channel. In this project, the GAIN pin is left floating and the gain is 9dB. The MODE pin is pulled up through a 1M resistor to make the chip work in (Left+Right)/2 mode, which is two-channel synthesis.
There is a toggle switch onboard to adjust the volume and other functions. Two voltage collection points can realize battery voltage collection and determine whether to charge or not.
The speaker is the external speaker of iPHONE7, which can be found in mobile phone repair shops. It is fixed on the circuit board with 1.8MM screws.

ESP32_PICO_D4+ST7735 development board V3 address: https://oshwhub.com/yiplay/esp32_pico_d4-st7735-kai-fa-ban-v3

14cc4e03e2d95e20a841b9fe209ca800.mp4

BOM download

PCB_PCB_ESP32_PICO_D4_SHIELD_V3.1_2022-09-23.pdf

PCB_PCB_ESP32_PICO_D4_SHIELD_V3.1_2022-09-23.json

PCB_ESP32_PICO_D4_SHIELD_V3.1_2022-09-23.pcbdoc

Gerber_PCB_ESP32_PICO_D4_SHIELD_V3.1.zip

PCB_PCB_ESP32_PICO_D4_SHIELD_V3_2022-09-23.pdf

PCB_PCB_ESP32_PICO_D4_SHIELD_V3_2022-09-23.json

PCB_ESP32_PICO_D4_SHIELD_V3_2022-09-23.pcbdoc

Gerber_PCB_ESP32_PICO_D4_SHIELD_V3.zip

Schematic_I2S AUDIO SHIELD_V3_2022-09-23.pdf

SCH_I2S AUDIO SHIELD_V3_2022-09-23.json

Sheet_1_2022-09-23.schdoc

61735

USB2LIN

Introduction: This converter is used for flashing electric motorcycle ECU firmware. It is theoretically universal and can be used for testing Suzuki.

# USB to LIN bus converter

This converter is used for flashing electric motorcycle ECU firmware. It is theoretically universal and can be used for testing Suzuki. The original programming line uses a 4-layer board. For convenience, the module also uses a 4-layer board.

- - -

## 1. Description

### 1. The shell

adopts a universal USB to serial port shell. Since the C port is relatively large, you need to bring your own file to modify it (the shell is very brittle, a utility knife is not recommended)

![Shell.jpg ]

*Interface after file modification:*

![Modified rear end of shell.jpg]

### 2. The wire

needs to be DIYed by yourself, one end is type-C, and the other is DJ7069Y-0.6-21 male connector.

*Correspondence:*

| type-C | DJ7069Y-0.6-21 male |
| :------: | :----------------: |
| VBUS | VBAT |
| GND | GND |
| CC1 | LIN |
| CC2 | LIN |

### 3. Signal flow

USB -> FT232(UART) -> TJA1021T(LIN) -> type-C

### 4. Note!

The original burning software can only recognize the FTDI serial port chip, and forced modification can only recognize it but not burn it (anyone who can directly change the host computer is free to do so).

The board and openings are a bit small, and the shell does not fit very well, so you need to use a round file. Modification (PCB file is too lazy to change)

- - -

## 2. Photos

### 1. Photos of this project

! [Chip side with case installed.jpg]

! [Back side with case installed.jpg]

![Chip side without case. jpg]

![Backside without case.jpg]

![Overall.jpg]

### 2. Original wire photo

![FT232.jpg]

![TJA1021T.jpg]

BOM download

PCB_PCB_USB2LIN_2022-09-23.pdf

PCB_PCB_USB2LIN_2022-09-23.json

PCB_USB2LIN_2022-09-23.pcbdoc

Gerber_PCB_USB2LIN.zip

Schematic_USB2LIN_2022-09-23.pdf

SCH_USB2LIN_2022-09-23.json

USB2LIN_2022-09-23.schdoc

61736

[Untested] 18650 charging and boosting integrated board

Introduction: 18650 lithium battery mobile power motherboard

This project does not comply with Jialichuang’s free board-making rules, but the plan has been verified and is highly feasible. This project has not been actually verified, please refer to it with caution.

BOM download

PCB_PCB_2020-11-26_12-07-56_2022-09-23.pdf

PCB_PCB_2020-11-26_12-07-56_2022-09-23.json

PCB_2020-11-26_12-07-56_2022-09-23.pcbdoc

Gerber_PCB_2020-11-26_12-07-56_2022-09-23.zip

Schematic_[Untested] 18650 charging and boosting integrated board_2022-09-23.pdf

SCH_[Untested] 18650 charging and boosting integrated board_2022-09-23.json

Sheet_1_2022-09-23.schdoc

61737

[Test passed] 18650 lithium battery camping lamp flashlight table lamp

Introduction: This design is based on sy3501, which has the function of charging and discharging the lithium battery to boost the voltage, and drives the LED light panel for lighting. The equipment switch is designed with a mercury switch to realize the function of forward and reverse control of LED turning on and off.

For this design, we have completed the overall shell design and uploaded it as a project attachment for everyone to download and use.

Shell.zip

BOM download

PCB_PCB_2021-01-21_03-38-44_2022-09-23.pdf

PCB_PCB_2021-01-21_03-38-44_2022-09-23.json

PCB_2021-01-21_03-38-44_2022-09-23.pcbdoc

Gerber_PCB_2021-01-21_03-38-44_2022-09-23.zip

Schematic_[Test Passed] 18650 Lithium Battery Camping Lamp Flashlight Desk Lamp_2022-09-23.pdf

SCH_[Test Passed] 18650 Lithium Battery Camping Lamp Flashlight Desk Lamp_2022-09-23.json

Sheet_3_2022-09-23.schdoc

61738

[Test passed] Computer audio card

Introduction: Desktop computer PCI cheap built-in audio

This project is a mono sound card based on pam8403. It takes power from the motherboard jumper and reserves a cable interface for built-in power and audio cables.
vcc and gnd draw power from the USB interface, the signal interface only takes mono, and the detection pin needs to be short-circuited, then the computer will output the audio signal.

BOM download

PCB_PCB_Computer Audio Card_2022-09-23.pdf

PCB_PCB_Computer Audio Card_2022-09-23.json

PCB_Computer Audio Card_2022-09-23.pcbdoc

Gerber_PCB_Computer Audio Card_2022-09-23.zip

Schematic_[Test Passed] Computer Audio Card_2022-09-23.pdf

SCH_[Test Passed] Computer Audio Card_2022-09-23.json

Sheet_1_2022-09-23.schdoc

61739

[Test Passed] ESP-01S Writer USB_TTL Downloader

Introduction: TTL burner compatible with esp-01s

This design is a two-in-one programmer based on ch340c. It is compatible with ordinary microcontrollers, and can also be used to directly program esp-01s with a programming socket. The selection of two different modes can be achieved by switching the switch. The design is to lead out the most commonly used TXD RXD 5V 3.3V GND in ch340c, and set 5V and 3.3V to the same VCC pin.
If you want to program an ordinary microcontroller, turn the switch to the 3.3V position, and the output will be 3.3V, and vice versa. The appropriate input mode should be selected according to the voltage of the corresponding microcontroller.
If you are programming ESP-01S, turn the switch to NC (no connect) for debugging mode. At this time, you can communicate with the module through the serial port, but programming is not possible. Turn the switch to GND and pull the pin level low, then you can program the program.

BOM download

PCB_PCB_2021-07-03_00-11-35_2022-09-23.pdf

PCB_PCB_2021-07-03_00-11-35_2022-09-23.json

PCB_2021-07-03_00-11-35_2022-09-23.pcbdoc

Gerber_PCB_2021-07-03_00-11-35_2022-09-23.zip

Schematic_[Test Passed] ESP-01S Writer USB_TTL Downloader_2022-09-23.pdf

SCH_[Test Passed] ESP-01S Burner USB_TTL Downloader_2022-09-23.json

Sheet_2_2022-09-23.schdoc

61740

electronic

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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