You can easily verify if a relay is receiving a trigger signal and if it’s properly grounded without needing to break out a full Multimeter for a simple "Go/No-Go" test. Blue Point EECR1B vs. A Digital Multimeter (DMM) A common question is: Why use this instead of a multimeter?
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Unlike a standard bulb that simply glows, the EECR1B provides instant polarity feedback: Indicates Power (Positive). Green LED: Indicates Ground (Negative). You can easily verify if a relay is