Transformer Terminal Unit (TTU)

Solar inverters

First generation electric vehicle power inverter control reference platform

Open source lithium battery management board, charging 5V2A, discharging 5V/1.52A or 12V/0.76A

This DIY LiPo super charger can charge a single LiPo battery and protect it from overvoltage, overload and short circuit. In addition, it can boost the battery voltage to 5 V or 12 V. The boosted output voltage is protected by an "eFuse" IC with a maximum output current of 1.52 A at 5 V and 0.76 A at 12 V. The charger part of the circuit requires a +5V power supply, which can be connected via USB-C, or simply solder two wires to pads on the PCB. Additionally, other connections can be soldered to pads on the PCB or use individual pin headers.

Schematic PCB

Based on STM32G431, a compact closed-loop servo driver designed for NEMA17 (42mm) stepper motors

Schematic PCB

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

Schematic PCB

2017 Electrical Contest Question K-Analysis of Single-Phase Electrical Appliances-Design Plan and Report (3 National Awards)

Schematic PCB

2017 Electronic Competition H Question-Remote Amplitude-Frequency Characteristics Test Device-Design Plan and Report (3 National Awards)

Schematic PCB

2017 Electric Power Competition Question A-Microgrid Simulation System-National First Report + Schematic Diagram + Simulation Document (Changsha University of Science and Technology)

Schematic PCB

2018 Electronic Competition Question E-Energy Recovery Device (Xidian University)

Schematic PCB

2021 College Student Electronic Design Contest Topic H Outstanding Works Collection (Electrical Appliance Analysis and Identification Device)

Schematic PCB

2021 College Student Electronic Design Competition Topic C Outstanding Works Collection (Three-Port DC-DC Converter)

Schematic PCB

2021 College Student Electronic Design Competition Topic B Outstanding Works Collection (Three-Phase AC-DC Conversion Circuit)

Schematic PCB

Open source 60W small UPS power supply reference design

Ideal for running network devices such as small switches, home routers, and WLAN access points.

Schematic PCB

TI ultra-low power wireless vibration sensor monitors motor reference design

Schematic PCB

Ardufocus-DRV8825: Precise open source focus controller

Ardufocus is the only OSS/OSH controller to support two independent focus motors, the high-resolution mode allows for stepwise sub-micron movements, multiple acceleration profiles, and it never forgets the focuser position between restarts.

Schematic PCB

Robot control board

2 Layers PCB 54.6 x 90.2 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen;

Schematic PCB

0-30V, 0-7A adjustable switching power supply

2 Layers PCB 42.2 x 68.8 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen;

Schematic PCB

0-30V 0-3A DC regulated power supply circuit

0-30V 0-3A DC regulated power supply circuit

Schematic PCB

Teacher ChaN’s AC load analyzer

Supports voltage, current, effective power, apparent power, power factor, frequency, and harmonic component display.

Schematic PCB