STM32F107ZET6 Minimum System Development Board

PDF_STM32F107ZET6 Minimum System Development Board.zip

Altium_STM32F107ZET6 Minimum System Development Board.zip

PADS_STM32F107ZET6 Minimum System Development Board.zip

BOM_STM32F107ZET6 Minimum System Development Board.xlsx

95916

CAN splitter board for Klipper 3D printer RRF CANbus communication line organization

A CAN bus switchboard similar to Fly3D is used for Klipper RRF CANbus communication line organization in 3D printers.

[FLY Product Link](https://item.taobao.com/item.htm?abbucket=12&id=731000996143&ns=1&spm=a21n57.1.0.0.1d2c523cdJ8ZhQ)
is just an ordinary CAN busbar.
FLY sells it for 25+5 (the ever-present shipping fee), but I got it from LCSC for free, and with the components I bought myself, the cost is less than 10 yuan. It's great ! If you're too
lazy to buy components and solder, you can find it on Xianyu (a second-hand marketplace) for around ten yuan with free shipping
. Actually, I designed this board for someone else! Hahaha! ~~
*****
To add a logo to the board, please select according to this image
! [image.png] and then select **Do not confirm production draft**

PDF_CAN splitter board for 3D printer Klipper RRF Canbus communication line organization.zip

Altium_CAN splitter board for Klipper 3D printer RRF Canbus communication line organization. zip

PADS_CAN splitter board for Klipper 3D printer RRF Canbus communication line organization. zip

BOM_CAN splitter board is used for Klipper 3D printer RRF Canbus communication line organization.xlsx

95917

DSP programming conversion board

Programming converter board for TI DSPs

The J-LINK to DSP programming converter
board provides a TYPE-C interface to convert 5V to 3.3V for TI DSP power supply
. The board also provides a standard 7*2PIN J-Link interface to convert J-Link to the corresponding pins of TI DSP,
such as TMS, TDI, TDO, TCK, etc.,
making it convenient to use J-LINK to program TI DSPs.

PDF_DSP Programming Converter Board.zip

Altium_DSP programming conversion board.zip

PADS_DSP Programming Conversion Board.zip

95918

Balance bike

The base of the balance car

The STM32 self-balancing scooter's drive base uses the TB6612 chip to drive the motor. The power supply uses a pre-built voltage regulator module and an LDO. The gyroscope is an MPU6050, with one serial port, one download interface, and two motor interfaces.
 
This is an improved version; the gyroscope module can now be screwed in for greater stability.
As for the code, I learned it on Bilibili, so I won't post it here—there's plenty of information available QAQ.

VID_20231028_153432.mp4

PDF_Swiss Bike.zip

Altium_Balance Car.zip

PADS_Balance Car.zip

95919

Touch Crystal Night Light

Inspired by the nightlights made by other content creators on Bilibili, I designed my own touch crystal nightlight (a great gift for your girlfriend).

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Four M3*40+4 stainless steel studs, stainless steel studs, hexagonal studs;
four M3*10 stainless steel studs; 304 stainless steel double-through hexagonal stud screws;
four M3 bolts (top selection, length approximately 5mm)
; four nylon M3 bolts (bottom selection must be non-conductive); Phillips head nylon screws;
several nylon plastic washers; M3*6*0.3 nylon washers; rubber plastic washers;
lithium battery size recommended: 1500mAh, size 50*34*7, 3.7V; small polymer lithium battery.
Other components can be purchased according to the BOM.
The crystal ornament in the center can be bought from this store; it's relatively inexpensive. A small, healing item for when you're bored and looking at rainy clouds; a small crystal ornament for computer desktop; a birthday gift.
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Assembly:
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I encountered many pitfalls during assembly, so I'll point out the points to note here to help everyone assemble.
The two sides shown in the image are the light panel and the base, respectively. These two sides should face down during assembly. Note that the "LED-" symbol in the upper left corner of the light panel must correspond to the "LED-" symbol on the base; the orientation is crucial.
During assembly, I used stainless steel pillars to connect the upper and lower base plates instead of wires. However, the holes I pre-drilled were slightly too large, which may cause poor contact during direct installation. Therefore, I suggest applying a little solder to the holes and then firmly screwing in the bolts. However, be careful not to screw directly in, as the stainless steel pillars can easily scratch the solder mask layer; therefore, always use nylon washers.
The PCB used for the bottom fixing, whether it's the light panel's PCB or the base's PCB, must correspond to the markings on the top. Also, the bottom bolts must be nylon; using metal bolts will cause malfunctions.
 
 
Looking at the finished
crystal, although four capacitors are used for fixing, the crystal is still somewhat wobbly, especially with the added plastic washers. Therefore, you can also use super glue (502) to attach the crystal to the board.
 

VID_20240223_225347.mp4

PDF_Touch Crystal Night Light.zip

Altium Touch Crystal Night Light.zip

PADS Touch Crystal Night Light.zip

BOM_Touch Crystal Night Light.xlsx

95921

WIFI relay

The WIFI relay developed based on ESP8285 uses the MQTT communication protocol. The protocol content can be customized, and the MQTT server address and user can be configured by logging into the device's web management backend.

1. Equipment Description
1.1 Appearance
1.2 Power Supply:
100~240V AC input, Lin connects to the live wire, Nin connects to the neutral wire.
1.3 Load Connection:
    The output signal is a passive relay signal, used for signal on/off control. It can handle a maximum load current of 10A. COM is the relay common terminal, NO is the relay normally open terminal, and the default state upon power-on is off.
1.4 Indicator Light Status Description:
There are three LED indicators: red, green, and blue. The corresponding device states are as follows:
Red light flashing rapidly: Waiting for network configuration Red light flashing slowly: Connected to the router, connecting to the MQTT server; Red light on: Connected to the MQTT server;
Blue light flashing once: Button pressed for more than 5 seconds;
Green light on: Relay on;
Green light off: Relay off.
1.5 Button Operation
: Short press for 1 second and release: Switch relay state;
Long press for 5 seconds: Device enters network configuration mode.
2. Function Operation
2.1 Connecting to the Wi-Fi router
requires using a mobile phone to run network configuration software. First, install the esptouch software on your phone. It only supports Android systems. Software download link: https://github.com/EspressifApp/EsptouchForAndroid/releases/tag/v2.0.0/esptouch-v2.0.0.apk
The network configuration steps are as follows:
Power on the device;
Press and hold the button for 5 seconds (release after the blue light flashes rapidly). At this time, the device enters network configuration mode;
Connect the phone to the router;
Launch the esptouch software on the phone and select EspTouch;
Enter the router password in the password box and then click confirm;
After successful network configuration, the EspTouch software will display the device's BSSID (MAC) and the LAN IP address assigned to the device by the router. You need to record the IP address for logging into the device's web management backend.
2.2 Web Management Backend
2.2.1 Login
Launch a mobile phone or computer browser on the same local area network. Enter the current device's IP address in the address bar, such as 192.168.10.103, and click to enter:
Username: admin
Default password: 123456
2.2.2 Change login password
Select the "USER" option in the directory bar:
2.2.3 Configure MQTT server
Select the "MQTT" option in the directory bar:
The default server HOST: broker.emqx.io, port: 1883, is a free MQTT server that can be used for testing.
2.2.4 View device information
Select the "DEVICE" option in the directory bar: