Openhardware : Open Hardware for Engineer

• Charger_USB.pdf
  • USB to battery charger + 5V Boost output
  • MP3401A, TP5400, TP4056, TP4333 application schematics
• MAX30100_brd.pdf
  • Pulse Oximeter and Heart-Rate Sensor application schematic
  • MAX30100
• PCF8574A_I2C_LCD.pdf
  • 8-Bit I/O Expander for I2C-Bus application schematic
  • PCF8574A
• STM_Bluepill.pdf
  • Blue Pill
  • STM32F103C8
• SX1509_brd.pdf
  • Voltage Level Shifting GPIO with LED Driver and Keypad Engine application schematic
  • SX1507/SX1508/SX1509
• USB2077A_brd01.pdf
  • 7-Port Full-Speed 12Mbps USB 2.0 Hub application schematic
  • USB2077A
• arduino_nano_v3x.pdf
  • arduino_nano 3.0 with CH340g application schematic
  • arduino_nano 3.0