Relay Board on eBay with 8 Relays

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hi, i'm noobie , have mega2560 on order. want control ac , dc motors, among other things. there bunch of relay boards 8 relays, made in china, on ebay. have experience these?  good? bad? specs can find require 15-20ma activate coil. 2560 handle this? help/advice. george b



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