"ROCK 64 STEREO AUDIO DAC ADD-ON BOARD", Is it okay if I turn on the power ?
#2
(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 ?

And

● 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.
  Reply


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

Possibly Related Threads…
Thread Author Replies Views Last Post
  Rock64 is unreliable after 3 years of service - power problem? ReleaseTheGeese 0 413 11-23-2023, 05:05 AM
Last Post: ReleaseTheGeese
  Rock64 PoE compatbility with Pi4 Hatt recent Single Board Computer offering from PINE kharak 1 1,182 04-26-2023, 11:38 PM
Last Post: tllim
Brick Rock64 usb2.0 Power Control Floating GPIO Tutorial Files & Notes MarkHaysHarris777 6 13,576 01-15-2023, 10:36 AM
Last Post: ds00
  power connector type please AlexS 4 4,891 01-11-2023, 07:00 AM
Last Post: dmitrymyadzelets
  Audio Pot Board Questions vfr400racer 4 3,331 10-11-2022, 09:21 PM
Last Post: Roberto2020
  Alternative power supply ju0n 0 1,090 09-06-2022, 02:46 AM
Last Post: ju0n
  Rock64 4K60P HDR Media Board Computer 64 bit MarkHaysHarris777 8 18,019 07-14-2021, 11:52 PM
Last Post: jontumontu
  RS-485 CAN HAT Rock won’t boot gnvdude 1 3,243 01-10-2021, 05:15 PM
Last Post: as365n4
  Help connecting a dvb board in the right gpio pins cosmodeal 0 2,232 11-11-2020, 12:48 PM
Last Post: cosmodeal
  Power Supply and Sinks for multi-Rock64 env Davo-CC 1 4,537 01-02-2020, 02:26 PM
Last Post: dpgraham

Forum Jump:


Users browsing this thread: 1 Guest(s)