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Raspberry Pi Zero: the $5 computer

raspberrypi.org

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Re: Raspberry Pi Zero: the $5 computer

#291

I find the lack of ethernet or wifi concerning. I get that they're trying to keep it small and low cost, but I can't immediately see any use for a Pi that can't run standalone.

You may be interested in CHIP. 8 USD (this Monday only), and includes wi-fi as well as integrated flash storage.

http://getchip.com/

Re: Raspberry Pi Zero: the $5 computer

#292
post #213

Earlier quoted context omitted.

The ESP8266 is quite slow, network wise. You could hook up the sensors to the Pi Zero directly using the GPIO ports and use a cheap USB WiFi adapter to upload the data.

I guess it would be harder to power an USB WiFi adapter. And it's not going to be cheaper than ESP2866.

Actually a 802.11n USB adapter costs $1.55, that's cheaper than a ESP8266.

Re: Raspberry Pi Zero: the $5 computer

#293
Does it make sense to run your own hardware again? If you leased rackspace at a provider, you could just have tiny clusters of these everywhere for each service and pay virtually nothing. You could have it triple redundant and have it configured however you wanted.

Edit: it was a dif time, but wasnt that hiw google got started? Tgey just bought a ton of hardware.

Re: Raspberry Pi Zero: the $5 computer

#294
post #214

Earlier quoted context omitted.

> * via Raspbmc, which I just found out has apparently ceased to exist... Try OSMC [1], it's a massive improvement over Raspbmc and is being developed actively. Works like a charm. If I'm correct, the main Raspbmc dev went over to OSMC a while back. [1] https://osmc.tv

Yes, thanks, but for now raspbmc works really well, I'm not sure I want to go through the whole update now unless there's a big compelling reason. I might upgrade to a 2B though, it's probably a lot faster (the current setup tends to freeze a little on rapidly changing frames).

You have to overclock to about 900 to get the resposiveness up.

Both of mine are perfectly stable at that speed.

Re: Raspberry Pi Zero: the $5 computer

#295

Oh Nice! They are finally delivering on what I feel was the great promise of the Raspi in the beginning. Full linux install in the size and price of a micro (read: Arduino). Some people are bound to gripe about the "lack" of ports but its not like this one displaced the A or B models. Its just another spin of the concept where you don't have to pay for expensive physical parts you don't need. Its a linux server at a…

There is a great new USB standard for this form factor:

https://en.m.wikipedia.org/wiki/USB_Type-C

It needs to reach a tipping point so the price drops but we're probably only a year away.

Re: Raspberry Pi Zero: the $5 computer

#296
post #286

Earlier quoted context omitted.

Same here. What I'm fantasizing about is a kit with a set of compute modules in a "tower stack" with a power supply, with horizontally oriented boards stacked on the height, with all compute modules connected to ports in the tower. And you could choose where the pin-outs leads - either straight out to connect to some electronics on the outside, or straight down to a router in the bottom. Then you could dedicate some…

What's this stack for? I'd be very surprised if it beat PC hardware + GPU for MIPS or FLOPS per $ or watt.

Agreed for a supercomputer design it would be awful, but for a stereotypical 99.9999% CPU idle applications, the big win would be total cost of ownership / capex.

On a long term view from many decades of observation, the digital world is bifurcating into one world thats 100% utilized all the time in data centers or real time control or video gaming, and another world that's 99.999% idle but when its active the users want it infinitely fast. And the two worlds don't talk or cross pollinate and are gradually using separate hardware.

Having spent some time in electronics labs, given experimental results with smoke emitting diodes, and given the GPIO ports, there is minimization of the total cost of hardware experiments. If you assume 5% of boards will be destroyed per PID/motion control lab, then minimization of board cost is key to minimization of cost of running the lab. Implementing a PC that costs 20 times as much but provides 100 times the performance would only result in increasing the cost of the lab by 20 times.

There is also a total wattage ecological argument. I have a pi running a 3-d printer and it works great and only draws a couple watts, but the web application is extremely fat and pointlessly featureful "because the cycles are there so may as well use them" and its not like installing a 100 watt PC would make better prints, it would just make an even more elaborate UI to use all available CPU cycles thus burn more coal. A 300 watt tor node doesn't really do anything a 3 watt tor node does, other than burn 100 times the coal.

Re: Raspberry Pi Zero: the $5 computer

#297
post #26

This is seriously impressive. While the Raspberry Pi is not the perfect hacker-friendly computer, it has done a lot of good. Some reasons off the top of my head: 1. Providing a low cost computer has given many people access to computers. Giving more people access to the web, email, an office suit, a programming environment AND giving people the ability of safely tinker without the fear of bricking an expensive device…

To add a fifth point if I may - it was also rocket fuel for getting CS into the (what most here will call 'K12') curriculum.

When I (only ~5 years ago) took GCSE (last compulsory qualification) 'IT' - even though it was the slightly different course for 'more able' pupils - we were learning how to make Flash animations, use MS Office, Windows Movie Maker, and sorry things like that.

Forget "fifth point" - I think it's impact on schools is #1.

Re: Raspberry Pi Zero: the $5 computer

#298
post #86

Earlier quoted context omitted.

How big is that a risk, though? Serious question - because I'm really considering using Chinese USB power supply units as power sources for my home automation project. I've been using one of those units for the last 5 days with no visible problems - no overheating, no noise, etc.

For that application it is better to get officially imported ones (eg. CE-marked in Europe), where at least the importer is vouching that the design meets minimum safety requirements. See http://www.righto.com/2012/10/a-dozen-usb-chargers-in-lab-ap... for some horror stories about crap USB chargers.

CE is worthless, what you want is a proper certification such as GS, TUV, UL or CCC (possibly others).

Re: Raspberry Pi Zero: the $5 computer

#300

Earlier quoted context omitted.

So... you will need to buy a power adapter and an Ethernet cable? That will come to, what, another fiver?

There's no ethernet port. So, also an ethernet adapter. But there's only one USB port (µUSB, too, so you most likely need an adapter to regular USB). So if you want more than just ethernet, you'll need an USB hub. But the RasPi's power supply has always been weak, so better get an actively powered one… And soon you're paying four times as much for the accessories than for the RasPi.

How exactly has the power supply been weak? I've been running three PIs (A+, B and B+) for a few years with no problems with just simple cell phone power adapters. However, I'm not plugging any extra hardware into them...perhaps that's why I haven't run into problems?
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