• 4-Relays Card User's Guide

4-Relays Card User's Guide

The 4-RELAY card is a stackable expansion card for Raspberry Pi B+, 2, 3 and Zero. It offers a compact and inexpensive solution for adding up to 32 relays to a Raspberry Pi project. Two of the Raspberry Pi’s GPIO pins are used for I2C communication, leaving 24 GPIO pins available for the user.

Pluggable connectors make the 4-RELAY card easy to use when multiple cards are stacked up.


Table of Contens


  • GENERAL DESCRIPTION
  • BOARD LAYOUT
  • BLOCK DIAGRAM
  • COMPONENT DESCRIPTION
  • CONFIGURATION JUMPERS
  • RELAY HEADERS
  • POWER REQUIREMENTS
  • MECHANICAL SPECIFICATIONS
  • SOFTWARE SETUP
  • AD-ON CARDS
  • BREAK-OUT CARD
  • DIN-RAIL KIT for RASPBERRY PI
  • MEGA-IO EXPANSION CARD

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4-Relays Card User's Guide

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