MHD7j

DIY Tank Drive Board

Overview

I saw a tank
model drawn by a Bilibili user and printed one out myself. It's quite small and uses an N20 geared motor. The turret's rotation is controlled by the geared motor.

The motor drive uses an L9110s motor driver chip, and it's powered by a single 18500 lithium battery. A boost circuit converts the voltage to around 7.4V to power the motor. The main controller is an ESP32, and development using Arduion is simple and easy to learn. Currently, the code has only been tested with Bluetooth sending '1234' to control the motor's left and right rotation.

Demo video.mp4

N20 chassis. 7z

ESP32_Tank code.7z

PDF_DIY Tank Drive Board.zip

Altium_DIY Tank Drive Board.zip

PADS_DIY Tank Drive Board.zip

BOM_DIY Tank Drive Board.xlsx

93448

All pins of the ESP32-S3-N16R8 minimum system are exposed (verified).

The ESP32-S3-N16R8 minimum system board has been soldered and the program uploaded for verification.

This is an ESP32S3 N16R8 minimum system board. The soldered code and uploaded program verification are complete

. I initially just uploaded it casually for sharing, but I didn't expect so many people to see it. The first version had some minor omissions
. The new version adds a pair of 5V pins and a pair of 3V3 pins, and also adds the corresponding silkscreen information for the pins.
Regarding PCB design DRC errors, errors related to the pins in the center of the ESP32 chip can be ignored: as shown in the image below.

PDF_ESP32-S3-N16R8 Minimum System Pinout (Verified).zip

Altium_ESP32-S3-N16R8 Minimum System Pinout (Verified).zip

PADS_ESP32-S3-N16R8 Minimum System Pinout (Verified).zip

BOM_ESP32-S3-N16R8 Minimum System Pinout (Verified).xlsx

93449

STC32G12K128 Development Board

Development board design using STC32G12K128 as the main controller

Based on the design of the official STC experimental box, the pins are brought out to the outside; in addition, a CAN transceiver chip is added to verify CAN communication.

70f28fed5f87a2b9fb4b37fd3fbef22.png

PDF_STC32G12K128 development board.zip

Altium_STC32G12K128 development board.zip

PADS_STC32G12K128 development board.zip

BOM_STC32G12K128 development board.xlsx

93451

electronic

Design Files

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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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Update:2026-03-27 01:51:43

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