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, <talk@gtalug.org> 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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