OpenFlops V1: Hardware open source floppy drive emulator/emulator

OpenFlops is a hardware open source floppy drive emulator/emulator inspired by the ubiquitous Gotek hardware. It is designed to run FlashFloppy firmware.

Schematic PCB

Lattice ICE40 HX4K FPGA breakout board

Breakout board for Lattice HX4K FPGAs with 10 PMOD connectors and onboard microcontroller for programming and communication via USB.

Schematic PCB

110/220VAC optically isolated zero-crossing detector module for DIN rail bracket mounting with 3.3V or 5V output - ideal for Arduino, ESP32/ESP8266

Detects Zero Cross point of AC supply (110/220VAC) and outputs a 1ms square pulse at 3.3V or 5V. 72mm x 20mm for DIN rail carrier mount.

Schematic PCB

1117 Simple board for voltage regulator

2 Layers PCB 14.8 x 24.8 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen;For SMD 1117 Set Voltage O/P Regs - LED Indication

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

10x10cm 1.27mm perforated board

2-layer PCB 100 x 100 mm FR-4, 0.8 mm, 1, tinned with leads, green solder mask, white silkscreen;

Schematic PCB

10KHz-30MHz Mini WIHIP AKTIF Antenna

10KHz-30MHz Mini WIHIP AKTIF Antenna

100 QFP to DIP

2-layer PCB 28 x 132 mm FR-4, 1.6 mm, 1, tinned with leads, green solder mask, white silkscreen;

Schematic PCB

TEVAL-SILPLC01: Main control STM32H723VG, safety certified PLC industrial board

STEVAL-SILPC01 is a PLC solution with 1oo2 architecture, featuring CLT03-2Q3 dual-channel digital input and IPS160HF single-channel digital output. The hardware design meets the SIL level. It has been officially evaluated by TÜV Italia (TÜV SUD Group) to SIL 2/PL d requirements: Random failure rate, system capabilities (for hardware), architectural limits in accordance with IEC 61508, EN 62061, EN ISO 13849 - 1, EN ISO 13849-2 standard.

Schematic PCB

Arduino development board GIGA RI WiFi based on STM32H7

Schematic PCB

Smart Gate Drive Coupler Evaluation Board

This reference design provides design guidelines, data, and more for the smart gate drive coupler evaluation board.

Schematic PCB

Power Multiplexer Circuit

In this reference design, a power multiplexer circuit with 2 inputs and 1 output is implemented on a small printed circuit board (PCB). Using MOSFET gate drive circuit ICs, eFuse ICs, Zener diodes, and small package MOSFETs selected from Toshiba's various product lines, an ideal diode with BBM and MBB switching is created.

Schematic PCB

DC 300V input BLDC motor without Hall control circuit using TPD4204F

This reference design provides design guidelines, data, and other content for a DC 300V input BLDC motor Hall-less control circuit using intelligent power devices. It implements vector control using an MCU designed specifically for motor control.

Schematic PCB

Open source C-mount lens USB industrial camera (source code, PCB, design and production instructions, etc.)

There are three boards in total, USB, FPGA and Sensor board. The FPGA board features a Lattice Crosslink NX LIFCL-40 and the required power regulator, and the USB board features a CYUSB3014 USB 3.0 SuperSpeed ​​controller.

Schematic PCB

ESP32+RP2040 two-in-one design board (schematic and PCB)

Schematic PCB

Hardware circuit realizes SPI to Ethernet 10BASE-T

It introduces in detail how to build an SPI to 10BASE-T to realize network data sending and receiving. 10BASE-T uses two differential pairs: one for transmission and one for reception. Each pair is coupled through a transformer and the signals are differential and Manchester encoded. All schematics and diagrams are open.

Schematic PCB

Homemade flexible capacitive sensor

By CNC engraving a PCB in the following manner, the curved pad can perform capacitive sensing in 3 different directions and ultimately detect the 3D position of the finger.

Schematic PCB

High resolution magnetic rotary encoder based on RP2040

This is a mature development board combined with a magnetic rotary encoder, which uses a Raspberry Pi RP2040 microcontroller with a base resolution of 36, expandable to 36,000 steps per revolution.

Schematic PCB

STR-NCS32100-GEVK: Reference design for ON Semiconductor rotary position sensor NCS32100

Schematic PCB

Reference design of Epson multimeter microcontroller S1C17M02/M03

Can measure DC/AC voltage, DC/AC current, resistance, inductance, capacitance, diode, frequency. Built-in 16bit ADC, digital filter, RMS effective value circuit and peak hold circuit. Multimeter control unit integrated with microcontroller, officially launched reference design kit, powered by button battery, including schematic diagram.

Schematic PCB