Warning on relay shield

Not a good idea to apply 230 volts to the Catalex relay shield without isolating J1 terminal solders pins first. :(

Relay shield

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The Datasheet page does say:

Place 2 layers of electrical tape on the top of the Arduino's usb connector. This will prevent the relay shield from making contact. Do not operate voltage more than 35V DC.

230-35 =?

raschemmel: 230-35 =?

195 ;D

That's really crap design though, to put the onus on the user to make it safe. Those pins should be trimmed as flush as possible, then insulated on the shield.

(That said, I have taped over those plugs on all my boards.)

It does say some not so positive things about their design/production process if they fix/manage design flaws with an update on a web page.

pwillard: The Datasheet page does say:

Place 2 layers of electrical tape on the top of the Arduino's usb connector. This will prevent the relay shield from making contact. Do not operate voltage more than 35V DC.

35 VDC is a strange limit. Max rating for the onboard relay is 30 VDC (and 250 VAC).

Although it is obvious this design was never reviewed by anyone with a brain, it does appear that those pins could be trimmed with the right small dike cutters to eliminate the arcing hazard to the USB connector.
Alternately, KAPTON tape or NOMEX paper is rated more than high enough to provide sufficient insulation.

RELAY PROBLEM.JPG

Moving connectors to another location is the safest way in revision ?? Can someone sue that manufacturer if they get the "buzz" ?

-Malhar