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License: CC-BY 3.0

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Update time: 2021-11-08 09:27:35
Creation time: 2021-05-04 09:17:04
Description

Description

Features

- LM2596 input is DC3.2V~46V. The input voltage is depend on your DC motor. 12V or 24V DC motor should be OK.

- LM2596 output should adjust to 5V for ESP32 and L293D

- ESP32 can receive MQTT command to control DC motor

- ESP send PWM signal to L293D

 

ESP32 Source Code

https://github.com/samuelchiang/ESP32_Doser

Design Drawing

Design Drawing

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ID Name Designator Footprint Quantity
1 M04 HTUJP1 1X04 1
2 OLED 0.96 INCH 128X64 I2C OLEDDS1 OLED 0.96 INCH 128X64 I2C 1
3 ESP32 U4 ESP32 1
4 12VDC DC1 DC-IN-TH_DC005 1
5 OUTPUT P1,P2,P3,P4 CONN-TH_2P-P5.00 4
6 L293D U1,U3 DIP-16_16P-L20.2-W6.6-P2.54-LS7.6-BL 2
7 lm2596 U2 LM2596-MODULE 1

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