"ROCK 64 STEREO AUDIO DAC ADD-ON BOARD", Is it okay if I turn on the power ?
(11-24-2018, 10:00 PM)t4_4t Wrote: I recently purchased "ROCK64 STEREO AUDIO DAC ADD-ON BOARD" from "PINE64-STORE".

The delivered items were different from the photos posted on the store.
So I checked the items before turning on the power.
(It can be judged at a glance that the circuit diagram that is published, and the item that arrived are different.
 Therefore, i can not discuss it on a circuit diagram basis)

As a result of the preliminary check, the following doubts came out.

When I measured the terminating resistors (R14/R15/R16/R17) used to drive the "pulse-trans",
its resistance value was 1Ω or less (actual measurement was about 0.3Ω).
In addition, "062" is printed on the chip resistor.
(It may be upside down "290", but I can not judge it, so I measured the value directly)


As another example of implementation,
We often see the use of values of several tens of ohms, for example about 50Ω.
But, I think this value of 1Ω or less is extremely small.

● Is this the correct value intended at design time ?


● When using it in this state does not damage rock64 itself ?
Please post a photo so that able to determine whether PINE64 store deliver wrong board to you.

Messages In This Thread
RE: "ROCK 64 STEREO AUDIO DAC ADD-ON BOARD", Is it okay if I turn on the power ? - by tllim - 12-01-2018, 01:57 AM

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