TL494 High Power Boost Power Supply

VID_20240107_094428.mp4

PDF_TL494 High Power Boost Power Supply.zip

Altium_TL494 High Power Boost Power Supply.zip

PADS_TL494 High Power Boost Power Supply.zip

BOM_TL494 High Power Boost Power Supply.xlsx

96515

Motor driver board with MP2236 step-down module

A very simple motor driver expansion board based on the WashyRaspberry Pi RP2040-ZERO development board. It provides interfaces for four TMC2209/A4988/DRV8825 driver modules, supporting the TMC2209's UART mode and normal DIR/STEP mode.

Project Description
: The design is inspired by risen_c's Pico_hub 3D printer motherboard/expansion board - RP2040 - waveshare. The original author's 3D printer motherboard is exquisitely designed, but it has many features I don't use, so I simplified it. This is my first time designing a PCB. If you find any problems with the circuit or have other suggestions, please feel free to comment. Thank you.
 

The DC-DC section uses a Coresource MP2236GJ synchronous buck converter to convert the 12V input voltage to 5V, supporting a maximum current of 6A (I haven't tested this, but you can refer to the video BV1M14y1X7uf by Professor Sun, an engineering student on Bilibili). Replacing R6 in the schematic with a 22.1kΩ resistor will change the output voltage to 3.3V, but this requires modifying the development board's power supply circuit. I will consider using jumpers later.
 The driver board interface is compatible with Makerbase's TMC2209 driver module; the jumper usage rules differ from other driver boards. As shown in the diagram below:

Pink box: MicroStep 1, DIR/STEP mode microstepping; MS1, address 0 bit of UART single-wire addressing mode;
 Orange box: MicroStep 2, DIR/STEP mode microstepping; MS2, address 1 bit of UART single-wire addressing mode;
Yellow box: No practical use in this design;
Blue box: This jumper is for the DIR/STEP mode microstepping of the A4988/DRV2588 driver module; MS3, DIR/STEP mode of TMC2209, this jumper cap is invalid;
White box: TMC2209 single-wire addressing UART mode (AUART in the schematic), all modules communicate with the microcontroller through the same interface (R/W access), the driver module address is set by setting the MS1 and MS2 jumpers;
 Green box: TMC2209 parallel UART mode (PUART in the schematic), can be used to control more than 4 driver modules (I don't need it, but I reserved the interface);
 Red box: CLK and PDN/UART interfaces are reserved, generally shorting them is sufficient. The jumpers on the A4988 and DRV2588 are for the Sleep and Reset pins. They don't work with the TMC2209 driver, where the CLK pin is NC. According to the Makerbase TMC2209 module layout and the TMC2209 datasheet, you can solder R5 to set an external clock for a higher baud rate.



 
3. Each module interface has a DIAG interface for connecting to the microcontroller, enabling sensorless homing.
 
Note:

 There are relatively few surface-mount components, making soldering easier, but I don't know if it's because the MP2236GJ chip is easily damaged by heat; I ruined two out of three. If you want to practice, I suggest soldering only the DC-DC section first (don't poke it with a multimeter probe, a lesson learned the hard way).
 There are quite a few connectors, and the GND pins are almost entirely copper-plated, increasing the difficulty of soldering.
 If you're not connecting a very high-power 5V supply, you can choose an inductor with a lower rated current, which is cheaper.
 Be extremely careful not to connect the driver module in the wrong direction, or it will burn out!
 The RP2040-ZERO should also be able to be replaced with a development board in the same package; you can modify it yourself.

PDF_Motor driver board with MP2236 step-down module.zip

Altium_Motor Driver Board with MP2236 Buck Module.zip

PADS_Motor Driver Board with MP2236 Step-Down Module.zip

BOM_Motor driver board with MP2236 step-down module.xlsx

96517

TPS54331_Neg&Pos_Regulator

Buck positive and negative pressure module

The buck circuit based on the TPS54331 can achieve positive or negative voltage output by modifying one resistor, and can be used in series within the same system.
This has been verified.