RA: Risistor Array. Looks 4 resistors in one pack.

回答: 省兩小錢錢玩_Dash board recover憂樂2013-10-18 12:22:21

Each resistor is about 30 to 50 Ohms.
It does not increase nor decrease microproceesor's performances.
It is used to reduce EMI only.

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