It seems that I was looking at the wrong side of the board, looking more
closely, it looks like the power is connected through a two single
female dupont pins on the bottom of the board and not JST connector near
the heatsink.
I found this thread about powering the board up. Sorry, reddit link --
https://www.reddit.com/r/Atomic_Pi/comments/bp0hvt/megathread_powering_your_atomic_pi_ask_all_your/
It is said that you need to connect several pins at once, perhaps this
usb-to-dupont splitter should be more appropriate for the application --
https://ae01.alicdn.com/kf/HTB18quXpQCWBuNjy0Faq6xUlXXal/Dupont-head-4-to-USB-PC-Fan-Power-Cable-Adapter-Connector-10cm.jpg
I'm not sure why the person who started the thread says that several
pins are needed, because dupont connector is rated for 3A. (according
to this thread --
https://electronics.stackexchange.com/questions/157026/dupont-connector-for-5a).
Full disclaimer -- I'm not an electrical engineer.
Alex.
On 2019-09-16 2:16 p.m., Alex Volkov via talk wrote:
It is so weird to have a home server board that doesn't have sata
ports, one of the older cubieturck boards is better equipped for this
task because it has gigabit ethernet and a sata port, though
throughput is limited to 40MB/s.
As for Hugh's note for the connector -- it looks like a standard JST
2-pin connector.
Technically you don't need to solder connectors because they are
crimped, but this is a technicality. I have a crimper if anyone
interested in making their own power supply out of usb cable.
Here's someone connecting it to power --
https://twitter.com/drunknbass/status/1158054016397393920?s=21
This connector is compatible with dupont connector, for which I also
have a crimper. More practically any electronics store would have the
cable, or something like this connected to a 3A 5V power supply will
do the job --
https://ae01.alicdn.com/kf/HTB1W1culKOSBuNjy0Fdq6zDnVXaM/Dupont-head-to-USB-PC-Fan-Power-Cable-Adapter-Connector-22cm.jpg
The price is really great, but I'm not going to buy it because I have
a similarly-spec'd cromebook that I can retire for the same role.
Alex.
On 2019-09-16 1:39 p.m., Stewart Russell via talk wrote:
On Mon., Sep. 16, 2019, 12:30 D. Hugh Redelmeier via talk,
<[email protected] <mailto:[email protected]>> wrote:
... I just assumed that it was some surplus board that was
being blown out. Maybe it is.
It is. It's from a home server thing that bankrupted the developer
before they got to market. Once they're gone, they're gone.
While it may not be as fast as eMMC, the Raspberry Pi 4 does have a
faster connection to microSD (with the right card). It also has DDR4
which makes it fairly quick.
I wrote a preso last week on a 4 GB Raspberry Pi 4 (over VNC, even)
and it didn't feel like an SBC at all. I hear that the Raspberry Pi
4 is somewhat unexpectedly picking up corporate sales as a cheap
dual-screen thin client.
Cheers
Stewart
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