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[Reply #15 on:]

i powered it by arduino signal through testing code ... and it is worked well

[Reply #16 on:]

I'm sure it appears to work well, but it is not good on the arduino. It's a bad habit that many newbies overlook and wonder why their arduino stops working correctly, days or even weeks later.

[Reply #17 on:]

i powered it by arduino signal through testing code ... and it is worked well

Do you want help or just validation of what you are presently doing? Post a link to your specific relay so we can look at it's electrical requirements.

Lefty

[Reply #18 on:]

Have you tried increasing the delay to 300 and printing the analog value to the serial monitor to see what the values are?