We will be attending Prototype Rails on January 6-8, 2022, in Cocoa Beach, FL. If you’re in the area, or already planning to attend, please take in some great clinics and stop by our tables and say hi. Hope to see you there! Note: Shipping of orders received Jan 5-17 may be delayed. Normal operations should resume Jan 18.

Qwiic-Compatible 16-Channel I2C Relay Board Driver



The I2C-RELAY16-QWIIC is a Qwiic-compatible relay driver board designed to piggyback on commonly available, Chinese-made boards with 16 SPDT relays.   (We don't sell the relay boards directly, but they're available from multiple sources - various vendors on Amazon (#1, #2), SainSmart, or even direct from China on eBay.)  It's a sister product to our I2C-RELAY16, except with handy Qwiic connectors rather than our usual 5V 6p6c I2C connection. 

Included are two Qwiic-compatible I2C connectors, a female 20-pin dual row connector to attach to the relay board's header, a PCA9671 16 channel I2C I/O expander, and three address solder jumpers to select 1 of 8 possible addresses.  The Qwiic connectors make it easy to connect to a whole ecosystem of other I2C boards.  Have a Raspberry Pi and need a bunch of output relays?  This is your board!


2.22"(L) x 1.04"(W)


The complete gEDA design files are available on GitHub.


Arduino Library Reference

  • $20.00

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