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Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

unihiker.com

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Re: Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

#221

Post by [deleted] »

lmpdev wrote: post #201
cosmojg wrote: post #187

Earlier quoted context omitted.

Assuming it's small enough for your needs, a used Intel NUC can get you loads more mileage than pretty much any ARM SoC at an equivalent price. Currently available on eBay: * $49.95 for an i5-5300U at 2.3GHz, 4GB of RAM, and 128GB of SSD storage * $89.00 for an i3-7100U at 2.4GHz, 8GB of RAM, and 256GB of SSD storage * $135.00 for an i7-5557U at 3.1GHz, 16GB of RAM, and 256GB of SSD storage ...all loaded with ample d…

If space is not an issue used Optiplexes or ThinkCentres are extremely useful for similar use cases $30-150 AUD The only concern I have is power consumption being orders of magnitude higher than modern SoCs

[deleted]

Re: Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

#222

Post by happymellon »

chaxor wrote: post #124
sosodev wrote: post #97

Earlier quoted context omitted.

Inferencing neural networks is a big one. It's hard to get near real-time performance without it. Depending on the use case of course.

Why on earth would you run ML on a potato?

Why wouldn't you?

It's the same situation as all the bitcoin miners from years ago. They mined on the GPU, so the CPU didn't matter as much as how many PCIe slots the motherboard had. The CPU is purely there to drive the operating system and enable the network to communicate with the GPU.

If you aren't using the CPU for anything other than the PCIe slot to enable a Nvidia card for ML, then a very cheap potato makes a lot of sense.

Re: Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

#223

Post by Rediscover »

death_syn wrote: post #137
gadgetoid wrote: post #115

Earlier quoted context omitted.

I’m still trying to get a Rock 5B to boot from NVMe. By all appearances they included a USB Type-C port that doesn’t work, so the system never pulls sufficient power not to boot loop. Apparently even after a firmware update. To be totally fair to the up-and-coming boards, the Pi was pretty poorly supported on day 1 and the community did (and still does) a lot of heavy lifting. I’m still waiting for a contender, but I…

You need to get a dumb brick for that Rock 5B. Looks like you got one of the ones with a bad firmware. When it negotiates the power drops out. There're tons of forum posts.

You are correct. I have many that do 5V 4A.

Re: Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

#224

Post by Rediscover »

bombcar wrote: post #206
Rediscover wrote: post #179

Earlier quoted context omitted.

If You have not tried what the other reply-post suggests (dumb brick), I have a 5V 4A dumb brick I can loan for a quick test. Seattle area. It has worked on quite a few boards here. Or purchase one from where-ever, they are really useful outside of SBCs (though they are usually 5.3V and 4.xA, so watch out with sensitive parts).

What is a dumb brick?

It is a power supply that if intelligent negotiations fail, falls back to providing 5V (at whatever current), usually (2023) USB-C.

Re: Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

#225

Post by [deleted] »

death_syn wrote: post #137
gadgetoid wrote: post #115

Earlier quoted context omitted.

I’m still trying to get a Rock 5B to boot from NVMe. By all appearances they included a USB Type-C port that doesn’t work, so the system never pulls sufficient power not to boot loop. Apparently even after a firmware update. To be totally fair to the up-and-coming boards, the Pi was pretty poorly supported on day 1 and the community did (and still does) a lot of heavy lifting. I’m still waiting for a contender, but I…

You need to get a dumb brick for that Rock 5B. Looks like you got one of the ones with a bad firmware. When it negotiates the power drops out. There're tons of forum posts.

[deleted]

Re: Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

#226

Post by Rediscover »

wildzzz wrote: post #214
bombcar wrote: post #206

Earlier quoted context omitted.

What is a dumb brick?

Sounds like a USB power supply that doesn't do any power negotiation and just gives as much current over 5V as it can handle. Those things typically top out at 2.4A so not really sure where you'd get one that could do much more.

4A, in my measurements.

Re: Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

#227

Post by Rediscover »

tonyarkles wrote: post #211
CommanderData wrote: post #89

Earlier quoted context omitted.

I purchased a few ARM boards in the past and won't do it again. All became e-waste. Rockchip notably, great hardware on paper. Try developing something that needs hardware acceleration and it's a paper weight. It's a common cycle of broken promises to provide drivers by manufactures, rinse and repeat. The exception being raspberry pi or expressif. Depending on the application.

They’re less popular in the hobby world, but the Freescale/NXP i.MX6 family has absolutely fabulous mainline Linux support. There’s still a Freescale tree, but for most functionality you don’t need it. A few years back a client of mine needed some other functionality that wasn’t available in the version that Freescale forked for their tree and they wanted me to come in and assess what it would take to backport the dr…

Bang! Spot on! Love NXP. Everyone else here, read the above comment.

Re: Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

#228

Post by wepple »

isoprophlex wrote: post #216
wepple wrote: post #186

Earlier quoted context omitted.

Lugubrious: adjective looking or sounding sad and dismal. "his face looked even more lugubrious than usual"

Yeah, did you see the screenshot? It didn't exactly spark joy, which these side project tinker tools should, in my opinion. Lugubrious, heh.

Oh yeah, that was the perfect word. I’d never heard of it and figured others maybe hadn’t either.

I anticipate I’ll be using that one semi frequently

Re: Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

#229

Post by darkwater »

youngtaff wrote: post #43
darkwater wrote: post #14

Unrelated but trying the HN wisdom here: any suggestion for a cheap touchscreen with a CPU attached and a battery that can be used as a control panel for Home Assistant? Yeah, probably some Android tablet but something that actually works well for this job and costs as less as possible? I cannot power it properly where I want to put it so it needs battery and then I can charge it as needed. Suggestions?

Something like a SenseCap from Seeed Studio? https://www.seeedstudio.com/SenseCAP-Indicator-D1S-p-5645.ht...

Oh, nice! maybe not as central controller (that would be still better on a bigger screen) but for each room control it could work very well! Thanks for the idea!

Re: Unihiker, an $80 single-board PC with 2.8“ touchscreen, quad-core ARM Cortex-A35

#230

Post by two_handfuls »

reaperducer wrote: post #178
elabajaba wrote: post #112

Earlier quoted context omitted.

If it has a camera, it can be used to steal your security keys if it can see the power LED on your device (or potentially even just if something connected to your device has a power LED). https://www.nassiben.com/video-based-crypta

Fortunately, none of my computers have power LEDs. Also, I don't live in a nuclear weapons facility where I need "security keys."

Security keys are a software thing, not a physical thing like in movies. They are used everywhere, like in ssh or OAUTH.
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