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

USB2.0 full-speed analyzer based on Raspberry Pi RP2040

This is a simple USB sniffer based on the Raspberry Pi RP2040. It supports low speed and full speed modes. The firmware presents itself as a virtual COM port (VCP), so no additional software is required and it is compatible with all operating systems.

Schematic PCB

Breadboard without jumpers: Based on Raspberry Pi Pico, analog switch matrix replaces jumpers

Flirting with jumper caps is a common practice on most boards, but not this board, which is designed to replace all those wires with an analog switch matrix. All one has to do is plug in the device and make a virtual connection on the accompanying GUI. There are also many built-in functions such as DAC and ADC, and the circuit can be switched under the prototype as needed. It also has some LEDs embedded in the breadboard area that light up and provide visual cues that they are connected to each other.

Schematic PCB

The early mobile phone system PalmOS was ported to Raspberry Pi RP2040

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

10-channel level converter with Raspberry Pi connector

A small add-on board for the Raspberry Pi that I have designed specifically to solve the constant problem of shifting levels on sensors

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

Adjustable 300v high voltage USB PD power supply, based on Raspberry Pi RP2040

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

L3751 DC converter reference solution

STMicroelectronics provides users with a reference design based on L3751, suitable for DC-DC converters with input voltage 36-72V DC, output voltage 12 VDC, and 10A.

Schematic PCB

Raspberry Pi RP2040 direct drive DVI/HDMI interface display cool display

These demos all use Adafruit's PicoDVI branch, which makes the video framebuffer look like a regular Adafruit_GFX object, which makes drawing very easy.

Schematic PCB