Single-layer refrigerator fan reference design enabling efficient drive

This reference design is a singled-layered, cost-effective, small-form-factor, three-phase sinusoidal motor drive for sensored BLDC fan motors specified up to a maximum current of 1 A RMS at 18 V maximum. The unique, single-sided design helps to bring down the system cost. The on-board Hall sensors facilitate the board mounting inside the motor itself. The design also demonstrates the features of DRV10970 such as single hall operation for further cost optimization, sinusoidal drive with adaptive drive angle adjustment for better system efficinecy and overall performance, speed control via external pulse-width modulation (PWM) input which brings an ease of speed control, etc.

Schematic PCB

Brushless power tool reference design (handheld electric drill reference design) based on STM32G431 and STDRIVE101

Schematic PCB

Tarocco: Open source closed-loop motor controller for non-small machines (including firmware, PCB, etc.)

Desktop CNC machines often use stepper motors, often because they do not require position feedback sensors, thus reducing system cost. But there are situations where a position feedback sensor is needed or necessary, and the power output of a stepper motor, especially at high speeds, becomes a bottleneck for those who want a better performing machine.

Schematic PCB

High-brightness single LED driver reference design for 1 to 2 AA battery applications

This reference design uses the boost converter TPS61021A to provide a high-efficiency LED driver circuit with dimming capabilities. The PWM dimming method can be used for one or two AA battery input applications, while the analog dimming method can be used for one AA battery input application. The PMP15037 enables dimming functionality by adding multiple resistors and a MOSFET to the circuit, making it a cost-effective and efficient solution for LED driver applications.

Schematic PCB

Non-inductive square wave drive application solution based on MM32SPIN motor/power supply chip - small and medium power water pump

This article briefly introduces the application example of sensorless square wave drive in "small water pump" based on MM32SPIN05TW.

Anonymous Science and Technology-Navigator Flight Control Information Package-v1.031

All flight control information is provided to buyers in the form of data packages, providing flight control development environment, various drivers, various STM32 chip information, all sensor information, flight control related knowledge information, etc., as well as anonymous flight control source code, communication Board source code, etc., the open source code is a complete set of projects, and buyers can directly compile and download it after getting it. Using our materials, you can easily get started with flight control learning and learn the structure and ideas of flight control engineering. After having a certain understanding of flight control, buyers can easily transplant the flight control program into their own system, or add the functions you need.

Schematic PCB

Application circuit of TLP7920 isolation amplifier (voltage detection)

Schematic PCB

Open source 12-lead portable electrocardiograph

This open source has a complete host computer, slave computer and schematic diagram, as well as a detailed design paper.

Schematic PCB

Application circuit of brushless DC motor pre-driver IC TC78B027FTG for fan drive

Schematic PCB

High performance, high reliability bipolar stepper motor driver based on BD63731EFV

The project presented here is a bipolar stepper motor driver. It is based on the BD63731EFV chip, a low-power driver driven by a PWM signal. The project power supply voltage is 8~28V DC, and the rated output current is 3A. The input interface adopts CLK-IN drive mode, and the excitation mode corresponds to FULL STEP mode (2 types), HALF STEP mode (2 types), QUARTER STEP mode (2 types), 1/8 STEP mode, 1/16 STEP mode through the built-in DAC . In terms of current attenuation, the SLOW DECAY/FAST DECAY ratio can be set without any restrictions and all available modes can be controlled in the most suitable way. Additionally, the power supply can be driven by a single system, simplifying design.

Schematic PCB

Sensorless sine wave drive application solution based on MM32SPIN motor/power supply chip - handheld vacuum cleaner

This article briefly introduces the application example of sensorless sine wave drive technology based on MM32SPIN25 in "handheld vacuum cleaner".

Brush motor drive application solution based on MM32SPIN motor/power supply chip - robot steering gear

This article briefly introduces the application example of brush drive technology based on MM32SPIN motor/power supply dedicated chip in "servo trajectory control".

3D printed portable wind turbine

The wind turbine is mainly 3D printed and equipped with a BLDC motor as a generator. Foldable and no larger than 2L soda bottle. Easy to replicate and low cost to manufacture.

Schematic PCB

PYPRCA: python programmable open source calculator based on Raspberry Pi PICO, developed using circuitpython

Pocket calculator style general purpose programmable device (computer) ideal for learning programming and improving building/soldering skills.

Schematic PCB

MCD Evaluation Board Design for Pump Motor Control

Schematic PCB

Application circuit of TLP7820 isolation amplifier (voltage detection)

Schematic PCB

iphone6-5.5+ schematic.zip

Apple's full series of drawings: iphone6-5.5+ schematics.

Schematic PCB

DC motor drive (solution design + chip information + schematic diagram)

DC motor drive (solution design + chip information + schematic diagram)

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3-phase brushless DC motor driver IC——TB67B008FTG

Schematic PCB

3-phase brushless DC motor driver IC——TB67B001FTG

Schematic PCB