16-Channel I2C Relay Board Driver
The I2C-RELAY16 is 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.)
Included are two 6P6C 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 jumpers to select 1 of 8 possible addresses. The I2C connector makes it easy to add the I2C-RELAY16 to our various I2C products and adapters. For Arduino users, be sure to check out the I2C-RELAY16 Library Reference for details on the Relay16 library and example sketch.
For a Qwiic compatible version (good for use with a Raspberry Pi), please check out the I2C-RELAY16-QWIIC.
2.22"(L) x 1.04"(W)
The complete gEDA design files are available on GitHub.
- 10 or more $15.00
- 0 in stock - contact us for lead time.
News & Application Notes
A Qwiic Update
This week I’d like to introduce you to two new Qwiic-compatible I2C products in our lineup: a new Qwiic-compatible, 2 channel analog to digital converter, and a re-spin of our popular I2C-RELAY16 into a Qwiic-compatible 3.3V version.
To explore how each of these can be used through a simple example, I’ll walk through an example connecting the ADC to a liquid level sensor, using Python on a Raspberry Pi to read the data, and then act on that liquid level by triggering a relay.
High Current DCC Accessory Decoder
One of our customers was trying to build an accessory decoder using our I2C-RELAY16 to drive a bank of relays for high current loads, and they were having a bit of trouble. So, I thought I’d sit down and work through the issues tonight, as I’ve always thought having an accessory decoder with isolated, high current relay outputs might be nice.[See image gallery at www.iascaled.com] Read More...
Controlling Relays with a Raspberry Pi
Ever wanted to control some real world hardware with your Raspberry Pi? Every now and then, we get questions about using either our I2C-RELAY16 or I2C-XIO boards from the Pi, and it’s been on my eternal backlog list of “I should do a quick article on that…” So let’s break this logjam and get down to controlling a cheap Chinese 16 channel relay board with a Pi (available from SainSmart and others). Because this provides 16 relatively high current, isolated output channels, this seems a great place to start, and it’s an easy hour project.