MAXREFDES1273: PoE-powered device and 48V 850mA active-clamped forward DC-DC converter using the MAX5974C and MAX5969B

The MAXREFDES1273 is a Power-over-Ethernet (PoE) powered device (PD) and an active clamp forward DC-DC converter (ACFC) that delivers up to 850mA at 48V from 39V to 57V supply voltage

Schematic PCB

MAXREFDES1209: Non-isolated 12V/0.5A 6W step-down converter using MAX17501

The MAXREFDES1209 operates over a 14V to 60V input voltage range to deliver output voltage regulated at 12V and up to 500mA of load current.

Schematic PCB

MAXREFDES1251: Single-Output Flyback Converter Using the MAX17596

The MAX17596 is a peak-current-mode controller for designing the wide input-voltage flyback regulators.

Schematic PCB

Open source industrial control baseboard made by Arduino for STM32H7

The schematic diagram is open source, you can see if there is anything worth learning from. This baseboard is designed for their previously launched H7 core board.

Schematic PCB

Production Line Tool launched by Dialog

The software part of this tool (including the host computer) is not open source, but the schematic diagram and PCB related files are.

Schematic PCB

DM9000 EMI test circuit reference

DM9000 EMI test circuit reference

Schematic PCB

Particulate pollution measurement based on ESP-32

Israeli network engineer Nir Huri invented an air pollution monitoring device based on ESP-32.

Schematic PCB

PCT2075DP-ARD: Arduino Shield

PCF85063AT-ARD: Arduino Shield -I ² C bus

FRDM-K22F-AGMP03: Sensor Toolbox development board for 10-axis solution using FXLS8962AF, FXAS21002C, MAG3110 and MPL3115A2

OM5579: Development kit for the PN7150 plug-and-play NFC controller

Maivin AI Vision Starter Kit

PCA9957HN-ARD: Arduino Shield board

KITFS5600FRDMEVM: FS5600 Evaluation Board

KITFS5600SKTEVM: FS56 evaluation board (with socket)

PCA9959HN-ARD: Arduino^® Shield Board

RDDRONE-T1ADAPT: Ethernet media converter for drones, rovers, mobile robots and cars

DIY an SMT placement machine OpenPnP

Nowadays, almost all circuit boards use surface mount packaging, so I have always wanted to DIY a chip placement machine. After searching online for a long time, I finally decided to use the open source OpenPnP. The hardware and software are both open source.

Schematic PCB

The most powerful T12 integrated portable soldering iron with gyroscope and buzzer, PD power supply

Built-in gyroscope, buzzer, supports multiple fast charging protocols, 128x64 OLED screen, standard T12 fixed bayonet. Regarding the problem of grounding the soldering iron, you can use the PD power supply of Mac and prepare a triangle extension cable to solve the problem perfectly. Or using a power bank directly is not a big problem.

Schematic PCB

SWD offline programmer

This project uses STM32F103RET6 as the main control, and is modified based on ST's official CMSIS-DAP project to achieve offline and read-protected programming (because the project currently only has F103 series offline programming requirements, so only F103 programming is temporarily added. write algorithm).

Schematic PCB