firtrees99 on eBay

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Location: United KingdomMember since: Apr 28, 2005

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Reviews (1)

5V 1/2/4/8 Channel Relay Board Module for Arduino Raspberry Pi ARM AVR DSP PIC

Jun 27, 2019

Works fine but no Circuit diag.

Note that Optical isolation you MUST remove the jumper and provide separate power supplies for relay coil and trigger. Do google search "jumper-function-on-relay-modules stackexchange" to get circuit diag. I note the many comments that these relays fail after a while. I have not used long enough to test but I wonder if using a 5V trigger vcc (the default if you do not remove the jumper) is the cause. I am using 3.3V.

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