Voron 2.4 Logo Light

PDF_Voron2.4 Logo Light.zip

Altium_Voron2.4 Logo Light.zip

PADS_Voron2.4 Logo Light.zip

BOM_Voron2.4 Logo Light.xlsx

95790

Electric screwdriver forward and reverse rotation circuit (adjustment)

A simple circuit for reversing the positive and negative terminals of an input power supply. It uses only a few simple components, is low-cost, and combines manual and electric operation to achieve its goal: the most perfect circuit is the one that suits your needs!

Although it's a very simple circuit, it's quite functional: one circuit displays the power switch, another is used for charging, and the third allows for reversing the positive and negative terminals. You can assemble it successfully even with your eyes closed, just by following the diagram.

PDF_Electric Screwdriver Forward/Reverse Circuit (Adjustment).zip

Altium_Electric Screwdriver Forward/Reverse Circuit (Adjustment).zip

PADS_Electric Screwdriver Forward/Reverse Circuit (Adjustment).zip

BOM_Electric Screwdriver Forward/Reverse Circuit (Adjustment).xlsx

95791

ESP32-S3-based intelligent voice solution verification board

Verification board based on ESP32-S3 and Espressif speech recognition solution (verified)

Function Overview:
Voice Command Recognition: Recognizes voice wake-up words and command words, and runs predefined function calls.
Speech Synthesis: Voice broadcast of Chinese strings. Voiceprint
Recognition: Identifies the speaker's identity.
Voice Source Direction Recognition: Identifies the direction of the speaker's voice source (lower accuracy).
 
The main configuration of the verification board is as follows:
WIFI MCU: ESP32-S3, external 16M Flash for storing data and model files required for voice SR and TTS.
Voice ADC/DAC: ES8388.
Voice Amplifier: NS4150B.
MIC Array: Dual analog silicon microphones, spaced 4.0cm apart.
 

PDF_ESP32-S3-based Intelligent Voice Solution Verification Board.zip

Altium_ESP32-S3-based Intelligent Voice Solution Verification Board.zip

PADS_ESP32-S3-based Intelligent Voice Solution Verification Board.zip

BOM_Intelligent Voice Solution Verification Board Based on ESP32-S3.xlsx

95792

TDA7379 Bluetooth Amplifier

TDA7379 amplifier chip, BT010 Bluetooth, dual-channel amplifier, supports AUX input.

The voltage is 12-18V, only 12V has been tested. There are two indicator lights: PS for power and BT for Bluetooth. The Bluetooth module can be switched on and off. All interfaces use 2.54mm pitch.

PDF_TDA7379 Bluetooth Amplifier.zip

Altium_TDA7379 Bluetooth Amplifier.zip

PADS_TDA7379 Bluetooth Amplifier.zip

BOM_TDA7379 Bluetooth Amplifier.xlsx

95793

RS232485

This is a hardware serial port debugging assistant based on CH340E. It can accept TTL, RS232 and RS485 signals and has been verified to be working correctly.

This is a hardware serial port debugging assistant based on CH340E. It can accept TTL, RS232 and RS485 signals and has been verified to be working correctly.

PDF_RS232485.zip

Altium_RS232485.zip

PADS_RS232485.zip

BOM_RS232485.xlsx

95794

HK32F030MF4P6 Minimum System Board

HK32F030MF4P6 Minimum System Board

The HK32F030MF4P6 minimum system board is unremarkable, but its symmetrical layout makes it look nice. The dual-row pin headers have a 5*2.54 hole spacing, leaving three rows of holes on one side when plugged into a breadboard, which is convenient for integration.

PDF_HK32F030MF4P6 Minimum System Board.zip

Altium_HK32F030MF4P6 Minimum System Board.zip

PADS_HK32F030MF4P6 Minimum System Board.zip

BOM_HK32F030MF4P6 Minimum System Board.xlsx

95795

USB to TTL based on CH340N

The CH340N chip is used as the control chip for the USB-to-serial converter. It provides a TTL level serial interface for easy connection to other devices.

The CH340N chip is a USB-to-serial converter chip that converts data from a USB interface into serial data and communicates with other devices via a serial port (TTL level). When a computer sends data via USB, the CH340N converts it into serial data and sends it to the target device through its serial port pins; conversely, it can convert serial data received from the target device into data recognizable by the USB interface and then transmit it to the computer.

PDF_USB to TTL based on CH340N.zip

Altium_USB to TTL based on CH340N.zip

PADS_USB to TTL based on CH340N.zip

BOM_USB to TTL based on CH340N.xlsx

95796

[Training Camp - Instruments & Meters] Replica CW32 Multifunctional Test Pen

This portable multi-functional test pen, based on the CW32F030, features functions such as voltage measurement and threshold judgment, continuity measurement, diode detection, and signal output.

The portable multi-functional test pen based on the CW32F030
 
encountered many difficulties from schematic design and PCB layout to PCB routing and soldering, but it was finally managed to be replicated with some difficulty.
 
The functions are consistent with the official examples, including voltage measurement + threshold judgment, continuity measurement, diode detection, and signal output.
 
The 0805 package surface mount components were all replaced with 0603, as I happened to have them on hand.
(Next time I must make the board larger, like the project for the test brick, otherwise it will be difficult for beginners to lay out, route, and solder. This time I barely managed to do it well.)
The layout and routing were a bit difficult, so I thickened and lengthened the board frame.
 
Due to a busy academic schedule, and midterm exams in the middle of the project, I really couldn't find the time. I will continue to improve it later.
 
 
 
Acknowledgements
 
:
 
Thank
you to everyone who encouraged me to complete this replication project, thank you to JLCPCB and the CW32 ecosystem community, and thank you to the staff who reviewed it.
 
 
 
 
 

PDF_【Training Camp · Instrumentation】Replica CW32 Multifunctional Test Pen.zip

Altium_【Training Camp · Instrumentation】Replica CW32 Multifunctional Test Pen.zip

PADS_【Training Camp · Instrumentation】Replica CW32 Multifunctional Test Pen.zip

BOM_【Training Camp · Instrumentation】Replica CW32 Multifunctional Test Pen.xlsx

95800

LM3915 Music Level Light

Music level indicator based on LM3915, using a microphone to collect sound.

The LM3915 music level light is
a relatively simple circuit that can collect ambient audio and adjust the sensitivity via a potentiometer.
During testing, the potentiometer was not soldered; the input of the LM3915 was directly connected to the output of the op-amp, and a 47k resistor was connected to ground to reduce interference.
This is the effect after lighting up. Personally, I think square LEDs are more suitable than round LEDs for level lights.