WS281x LED RS485 transceiver

WS281x 485_TX-2.00_2.00-SCH

WS281x 485_RX-2.00_2.00-SCH

75280

Open source current probe based on Rogowski coil

This project is a Rogowski coil based current probe designed to measure high frequency AC current in small spaces. The sensing coil is optimized to be small enough to fit between the leads of a TO-220 transistor and can be slid around the leads of many through-hole power components for non-intrusive current measurements. The project consists of a Rogowski coil and an integrator/amplifier that conditions the signal from the Rogowski coil and provides an output voltage proportional to the current flowing in the conductor surrounded by the Rogowski coil. The sensing coil is open ended and the free end is held in place by a fixed O-ring. This allows the coil to be placed around the wire without breaking the circuit. The amplifier provides a 0.1V/A output via an SMA connector and is designed to drive a 1M oscilloscope input via coaxial cable. The amplifier is powered via a USB-B connector and consumes less than 2W. Typical Electrical Performance Bandwidth: 800 Hz - 25 MHz Sensitivity: 0.1 V/A Maximum Current: +/- 30 A Noise: 6mA RMS Slew Rate: 1 A/ns Coil OD: <1.7mm Length: 70mm Current probes meet The original design target is suitable for general laboratory use. Recently manufactured versions of the integrator have some issues with wireless signal (WiFi and LTE) interference. The PCB files in the latest submission have layout changes to accommodate the circuitry under the metal shield can, which should largely resolve the issue. Only minor electrical modifications have been made in the updated version, but they have not yet been tested.

Schematic diagram, design description, etc.

75578

Open source USB2.0 high-speed analyzer

The analyzer host computer directly uses Wireshark. The hardware is implemented using Cypress CY7C68013A MCU + Lattice LCMXO2 FPGA + Microchip USB3343 USB PHY

The analyzer host computer directly uses Wireshark. The hardware is implemented using Cypress CY7C68013A MCU + Lattice LCMXO2 FPGA + Microchip USB3343 USB PHY

Schematic, PCB, firmware, etc.

75579

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

Implement preventive maintenance, CR2032 button battery can provide power for 10 years

This reference design is a low-power wireless subsystem solution that uses vibration sensing to monitor motors to determine if preventive maintenance is needed. FFTs of vibration data can be sent to another device using Bluetooth Low Energy or sub-1GHz wireless protocols. The subsystem solution's low power consumption and wireless capabilities enable it to operate on a single coin cell battery, allowing devices to be small, inexpensive and placed in hard-to-reach locations. This makes this reference design an ideal alternative to preventatively avoidable costly maintenance and the need for larger, more expensive displays that require wired connections. Features - Ultra-low power design enables up to 10 years battery life on a single CR2032 coin cell - Provides mechanical vibration (20ksps) and temperature sensing - 2K FFT local computation for vibration spectrum analysis - Programmable wake-up for motor diagnostics Spacing - Designed for SimpleLink sub-1GHz and Bluetooth Low Energy Wireless LaunchPad (LAUNCHXL-CC1350)

Schematic diagram

BOM

Assembly drawing

CAD/CAE symbol

Gerber

Design guide

75580

Interactive Memory Technology Learning Kit Core64

Core64 combines real core memory and LEDs in a unique interactive way. Core Memory is a magnetic memory technology from the 1960s and 1970s. The tip of the stylus has a magnet that interacts with the LED through Core Memory. In practice, users can think of it as a magnetic touch screen

Core64 combines real core memory and LEDs in a unique interactive way. Core Memory is a magnetic memory technology from the 1960s and 1970s. The tip of the stylus has a magnet that interacts with the LED through Core Memory. In practice, users can think of it as a magnetic touch screen.

Schematics, documentation, firmware, etc.

75581

USB-C "switch", hardware open source, firmware provided

The basic functions of USB-C are supported, such as high-speed communication and charging functions. Then this design solves the problem of painless switching between one host and multiple devices, or one device and multiple hosts.

 The basic functions of USB-C are supported, such as high-speed communication and charging functions. Then this design solves the problem of painless switching between one host and multiple devices, or one device and multiple hosts.

PCB

firmware

75582

electronic