Simple, high-quality condenser microphone DIY for under $100

Schematic PCB

Zhihuijun's new work: Hanwen smart keyboard with FOC force feedback knob, multi-function, modular mechanical keyboard (schematic, firmware, etc.)

The keyboard uses a modular design. The multi-functional scene interaction module on the left can be replaced with various custom components. By default, a Dynamic component with an e-ink screen and FOC force feedback knob is used; the keyboard body uses a shift register method to implement the key scanning circuit; The module and keyboard body can be used alone, or they can communicate and call each other through the serial port protocol.

Schematic PCB

200 W Game Console AC-DC Adapter GreenPoint® Reference Design

Open Source Electromyography EMG Project

In the open source electromyography project shared here, the author used this product to create a computer game control effect.

Schematic PCB

255 W, 80PLUS® Silver Certified ATX Power Supply GreenPoint® Reference Design

60 W USB-PD and Quick Charge 3.0 Buck-Boost Reference Design Documentation Package

syzygy-epc901: SYZYGY and EPC901 CCD + 50MSps ADC

The EPC901 is a 1024x1 CCD sensor capable of providing 50MHz pixel output. It outputs analog voltage from the CCD element. The author paired it with a 50MSps ADC on a SYZYGY board. The datasheet says it can run up to 50k fps. External I/O is provided via optocouplers to facilitate connection to external trigger sources such as motion controllers. This board will assist in conducting experiments on the new PnP platform. Objects can be moved through the line scanner to capture the position of the photo.​

Schematic PCB

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

Schematic PCB

IEEE 802.3bt PoE PD reference design with NCP1566-based isolated DC/DC converter

30 W Automotive 2 MHz Preregulator, Non-Isolated, Synchronous Buck Reference Design Based on NCV891930

OLED-Boy, a mini OLED game console based on ATmega328P

This is an open source work by netizen aziddy, based on the classic Adafruit Feather 328P development board (the MCU master is Microchip's ATmega328P) and a mini electronic game console with a 128x64 OLED screen

DIY personal laptop

The author specially bought a laptop motherboard, and then DIYed the peripherals and casing. The overall effect is quite beautiful.

Schematic PCB

PIKOCUBE - WiFi-controlled programmable dice composed of 54 LEDs

This dice mainly consists of an ESP8285-01F, six PCBs and 54 LEDs. Its structural design is very clever, and the exquisiteness of the structure is also reflected in the production process.

Schematic PCB

100 W automotive preregulator, non-isolated, synchronous buck reference design based on NCV881930

30 W Automotive 410 kHz Preregulator, Non-Isolated, Synchronous Buck Reference Design Based on NCV881930

RDR-848 - InnoSwitch3-Pro with PowiGaN technology, 42 W dual-port isolated flyback power supply with 30 W USB PD 3.0 and 12 W USB-A ports (INN3379C-H302

Schematic PCB

Amethyst - a retro home computer built with only 6 chips

Amethyst is a classic home computer developed by Matt Sarnoff. It has an integrated keyboard, can generate sounds and images, uses the Forth programming language, has image and voice commands, a debugger and screen editing functions.

Schematic PCB

Li-ion battery monitoring and fuel gauge evaluation board based on STC3100

Lithium-ion battery monitoring and gas meter evaluation board based on STC3100

Schematic PCB

S32K116EVB: S32K116 universal evaluation board

Schematic PCB

DER-917 - InnoSwitch3-CP based on PowiGaN technology, 60W power supply for wall socket with USB Type-C/A port

Schematic PCB