Jumpers
There are two jumpers on the underside of the Qwiic Quad Relay. The first is the address jumper that changes the
default I C address from
0x6D
to
0x6C
. The second is the jumper labeled
5V Wall Adapter Jumper
. If you intend
to use a wall adapter or other power source that is below 7-15V than you can close this jumper to side step the on
board voltage regulator, and provide 5V directly to the 5V power system.
Qwiic Connectors
The Qwiic connectors allow you to integrate easily into our Qwiic environment and allows you to prototype
without
the need for soldering! The 3.3V provided by the Qwiic connector will power the on board ATtiny84A. If you do not
power the 3.3V power system this way, you can still provide power through the four pin header.
Safety Considerations
This product is designed to switch high power AC or DC and so has some inherent dangers. We’ve done our best
to implement safety features directly into the design. To begin, the copper ground pour for the ATtiny84A circuitry
is restricted to an area apart from the relays. In regards to the microcontroller, there are opto-isolators that isolate
the 3.3V power system that it utilizes from the 5V power system of the relays. Next, the common pin of the relays
have an air gap surrounding the pin on three sides to prevent any high voltage arcing. Finally, the traces on the
relays are extra wide to handle the high amperage carrying potential of the relays.
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