黄土马家

【Training Camp】A little bitch

Overview

Question requirements

The small clock does not need to be moved. In order to save costs, it is powered by an adjustable power supply.

Schematic design instructions

Design the logic circuit according to the manuals of Hi3861 and PCA9685, and use the verification version of the LDO circuit for power supply

PCB design instructions

Transfer the schematic to PCB and design the layout of the pads

Send to board factory for proofing

welding

Assemble

Software description

The picture above shows the host computer control software. It is necessary to burn the firmware into the Hi3861 module in advance. Note that the RX of the burner is connected to the TX of the PCB, otherwise TX is connected to RX.

Physical display instructions

Precautions

Connect to the WIFI of the board, enter 192.168.10.1 in the browser and click the installation angle

Adjust to the position shown below for installation

Note that the servo must be tightened with the fastening screws when installing it, otherwise the rocker arm may fight.

Due to the problem of acrylic cutting accuracy, M1.7 self-tapping screws cannot fix the screws very well, so hole expansion and other operations are used to install M2.5 screws.

And because there is no whiteboard eraser, I have to wait for the handwriting to be quickly "erased" manually.

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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Update:2025-05-14 13:00:54

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