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[Test Passed] ESP-01S Writer USB_TTL Downloader

Overview

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

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Update:2025-06-20 18:02:04

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