Phidgets Forums

When using a general-purpose relay with the digital output of an interfaceKit, you need to power the relay from a 5vdc source on the ifKit. Typically (and per the instructions for the 3051 dual-relay Phidget) the relay is powered from an analog input and triggered from a digital output.

Now, when using a VINT hub in digital output mode all three relay inputs are available on a single VINT port: ⏚, +, and Trigger. Of course, this doesn't help much with the 3051 because the connector on the 3051 is not wired to match the VINT hub. Bummer.

But, there are very simple, inexpensive relays that do match up perfectly. This allows the relay to be directly connected to the hub using a standard sensor cable.

My question... Is there any reason to not use a relay in this way?

3051 was designed for older Phidgets with analog ports. We offer REL2001, REL2002, REL2103 as equivalent (though only single) VINT port relays. The relays you posted should also work fine - I suppose ours are a bit more expensive, but also include an enclosure.

-Patrick