SCD30-3d-model: 3d model of the SCD30 CO2 sensor

The design is a custom 3d model from Sensirion. Sensirion provides a 3d model, but it has very few features.

Schematic PCB

L99SM81V Evaluation Board

The EVAL-L99SM81V is an evaluation board designed to drive one bipolar stepper motor in micro-stepping mode together with coil voltage measurement for stall detection.

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

pcie_x4: SYZYGY creates PCIe x4 add-in card

SYZYGY is an FPGA extension standard for medium to high speed interfaces. This breakout connects the SerDes in the SYZYGY-TXR connector to the card edge to act as a PCIe x4 add-in card. This breakout is very simple and can be made into a shorter SYZYGY pod.

Schematic PCB

PiEEG: A brain-computer interface based on Raspberry Pi that can measure EEG, EMG and ECG biological signals

A Raspberry Pi board is used as the processor to process eight brain electrical signals in real time.

Schematic PCB

MAXREFDES62#: RS-485 communication micro PLC card

The MAXREFDES62# reference design ushers in the era of Industry 4.0. With dual RS-485 communication channels for the next generation of ultra-small programmable logic controllers, this design meets the data rate and higher voltage needs of industrial control and industrial automation applications, while consuming minimal power and space. This high-performance system features one half-duplex RS-485 transceiver, one full-duplex RS-485 transceiver, a complete, efficient power-supply system and on-board processing. Hardware and firmware design files as well as results of lab measurements are provided.

Autoware: Open source software project for autonomous driving, including positioning and object detection, route planning and control

Schematic PCB

Green Smart BMS: Intelligent Battery Management System

The project originated when the author purchased an electric motorcycle for his daughter and replaced its original lead-acid gel battery with a lithium battery pack. Due to the lack of smart, cheap and easy to configure lithium battery management systems on the market, the author decided to make one himself.

Schematic PCB

battery powered fluorescent lamp

Battery-operated fluorescent lighting projects often appeared in hobby electronic magazines in the 1980s. I always thought that fluorescent lamps were devices that only used AC power at that time. Those articles about using batteries to light miniature fluorescent lamps attracted me. I made some fluorescent lights, but I couldn't get good practical use out of them from a lamp efficiency and longevity perspective. That's because I was just reading the article and knew nothing about the theory of discharge lamps or even electronics. I don't know what to change to get good results, and I'm losing interest in it. However I found a battery powered fluorescent light project online that was identical to the schematic I was working on. So I "revived" the project after 30 years with modern driver circuits and correct theory.

Schematic PCB

CN0255

16-bit, 100 kSPS single-supply low-power data acquisition system

Schematic PCB

CN0326

Isolated, low-power pH monitor with temperature compensation

Schematic PCB

pmod-gnss：GNSS PMOD、GPS + Glonass

This design is a PMOD with the ublox NEO GNSS receiver footprint. Able to receive GPS and GLONASS simultaneously.

Schematic PCB

CN0273

High-speed FET input instrumentation amplifier with low input bias current and high AC common-mode rejection

Schematic PCB

BPW34 photodiode acts as a solar cell to make a supercapacitor watch (schematic diagram, etc.)

The standby time is acceptable and in good condition, more than 7 days.

Schematic PCB

CN0247

12-bit, 1 MSPS SAR ADC and driver, total power consumption is less than 5 mW

Schematic PCB

CN0264: Robust Composite Video Transmission Solution with Output Short-to-Battery Protection for Rearview Cameras and Rear Seat Entertainment Systems

Robust composite video transmission solution with output short-to-battery protection

Schematic PCB

PNEV512R: EXPLORE-NFC - Exclusively supplied by element14

EXPLORE-NFC - exclusively supplied by element14

pmod-sd-dummy: virtual SD card connected to the host system via SDIO

​This design has a PMOD for the SD card to emulate the SD card to the host system.

Schematic PCB

CN0263

Robust video receiver with battery short-circuit protection on input      

Schematic PCB

OM13584: PTN5150A-PTN36043 USB Type-C CC Logic Evaluation Kit

Evaluate USB Type-C CC control logic in DFP and UFP (or DRP) configurations. Also included is the PTN36043 USB3.0 SuperSpeed ​​redriver.

Schematic PCB