COM-16566 Datasheet by SparkFun Electronics

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SparkFun Qwiic Quad Relay
The SparkFun Qwiic Quad Relay is a unique power accessory board that has been designed for
switching not one but four high powered devices from your Arduino or another low powered
microcontroller using I2C. Taking a look at the board, the Quad Relay has four individual relays rated
up to 5 Amps per channel at 250VAC or 30VDC. Each channel also has its own uniquely colored
LED, silk for easy identification, and screw terminals for optional connection. Utilizing our handy
Qwiic system, no soldering is required to connect it to the rest of your system!
At the heart of the SparkFun Qwiic Quad Relay is an ATtiny84 that takes various commands to
toggle the four relays. The I2C address of the ATtiny84A is software configurable so if you had the
desire and power, you could daisy chain over 100 Qwiic Quad Relays. There is also a header that
breaks out the four I2C lines if you're not taking advantage of the Qwiic connectors. And last up, the
barrel jack is rated for wall adapters in the range 7-12V but we have equipped this relay board with a
jumper on the underside of the board if you want to use wall adapters at 5V.
Messing with such high voltage is dangerous! We've included many safety precautions onto the PCB
including, wide traces designed for high amperage, ground isolation between the relay and other
circuitry, and a milled out area around the common pin of the relay. However, with all the safety
precautions included with the SparkFun Qwiic Quad Relay, this is still a power accessory for users
who are experienced around, and knowledgeable about high AC voltage. If that's not quite your jam,
that's okay! Check out the IoT Power Relay, instead, to start learning how to use power relays easily!
The SparkFun Qwiic Connect System is an ecosystem of I2C sensors, actuators, shields and cables
that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm
pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized
connections mean you can’t hook it up wrong.
Four JZC-11F Relays
o 5A at 250VAC, 30VDC
o Each relay has its own colored LED and silk labels for easy identification.
Safey Features
o Ground pour isolated from relays.
o Air gap around common pin on the relays.
o Large trace width on relay pins far exceeding the peak 5A current.
o I2C commands for toggling individual relays or all the relays at once.
o I2C commands for turning all relays off or on.
o Two I2C addresses
0x6D (Default)
o I2C address is software configurable.
o All commands are listed in the example code.
Screw Terminals
o 26-14 Gauge AWG wire
o Max Current Draw ~250mA
o Vin via Barrel Jack
7V to 12V
o Vin via Barrel Jack w/ Bypass Jumper Closed
Revision Changes: The latest revision includes the following updates.
Included a normally closed jumper for the power LED.
Switching regulator in place of a linear regulator.
o The switching regulator is much more efficient; no external cooling needed when
powering four relays at once.
Improved circuitry around the relays.
o An issue where relays on certain boards in v1.0 didn't switch completely when
actuated has been resolved.‐3‐20

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