XDriver driver module

Version 0 Update
Version Name: Car Driver Module V1.1
Update Time: 2023/11/16
Update Content:
1. Improved wiring logic, changed wiring routing to enable the power switch and fuse to function.
2. Optimized the voltmeter installation position for better suitability.
I. Project Introduction
Project Introduction Video
Car Demonstration Video
1. This driver board uses two DC-DC step-down modules, LM2596S-ADJ and ETA3409S2F, both adjustable step-down.
2. Multi-channel input/output design to adapt to various scenarios.
3. Can drive four motors and three servos. Each motor and servo is equipped with a power switching switch for easy power switching.
II. Effect Diagrams
III. Functional Modules
1. Step-down Module - LM2596S-ADJ
This chip has a maximum input voltage of 40V, an output voltage of 1.2-37V, and an output current of 3A. The schematic diagram is drawn based on the chip datasheet and is a conventional design. The only difference is the addition of a resettable fuse. I chose one with a voltage of 16V, an output current of 3A, and a trip current of 5A, because my scenario is basically below 12V. You can choose the appropriate one according to your needs.
2. Step-down module - ETA3409S2F.
This chip has an input voltage of 2.4-7.3V and a maximum output current of 3A. In the design scenario, the LM2596S is used to step down the voltage and supply it to this chip, generally around 5V. Remember not to exceed 7.3V.
This module supplies power to a 3.3V system.
3. Motor module .
The driver chip used is RZ7899, which operates at 3-25V. This chip is used by LCSC's Liangshanpai car, and there is a lot of information about it on the open source platform.
4. Servo module.
Three servo motors are brought out here, which can generally meet many simple scenarios.
5. Motor and servo power selection module.
The data lines of the motor and servo need to be brought from the main controller to the driver board, because there is no MCU on the driver board.
Each motor and servo is equipped with a power switch, and the power can be selected from either input or output.
6. Input/Output Interfaces
: Three input interfaces: DC socket, connector, and terminal block. To meet different input scenarios.
Three output interfaces: connector, terminal block, and USB female connector. To meet different output scenarios. The USB female connector is designed for USB 5V applications.
One 3.3V output interface: for use with 3.3V power systems.
7. Digital Tube Voltage Display Module:
This digital tube voltmeter module was purchased directly from Taobao; it displays voltage upon plugging in. Future design options are available.
Additionally, a switch is included to toggle the power supply voltage display.
0.28-inch 2-wire Digital Tube Voltmeter.
Notes:

This project will be continuously improved and
updated. Update time: 15th or the last day of each month.
Access methods:
UP: open01_T_Jupiter; duduvue;
QQ: 826793815.


Subsequent open-source projects and updates will be released on Bilibili, LCSC Open Source Platform, Github, and Gitee. Please follow for real-time updates!