Make sure the Raspberry Pi products you buy are a good match for your requirements.

12 points•rbanffy•about 4 hours ago•4 comments•

4 comments

noahnathan25about 3 hours ago
You could just use an old second-hand phone for under $60. You’d get a built-in battery, much more RAM, and a screen included. For the output, just use a $3 ESP32 connected over Wi-Fi or USB. Seems like a much better deal for a lot of projects.
wds21 minutes ago
For a bit more physical space, used laptops have the same and more.

I run a headless laptop as a server and it works great, and just sips power. It didn't have Ethernet built-in, so I just replaced the WiFi card with one and it worked just fine (and also let me panel mount the connector for a DIY 1U enclosure).

While I did not get it myself, I recently saw a business laptop I was hawking with 8GB of RAM and a relatively modern CPU sell for less than $50 on eBay. All that was wrong with it was a bad back panel; just some broken plastic which I wouldn't have been using regardless.

I could see myself running a whole rack of headless laptops in the future. It's more likely than me buying a single new Pi at these prices.

Reubachiabout 2 hours ago
Making any recent second-hand smartphone a SBC-equivilent field computer is always a custom job/not scalable.

OF course, that shouldn't matter for most tinkerer jobs like a CarPi. But anecdotally, I tried using my old iphone 13 (idk why I tried this) and then a couple old galaxies for my car project taking data from bluetooth dongle and relaying to a custom gui I made. Of course also dealing with power cycles and screen, data trasnfer etc.

Very, very quickly it became easier to justify buying a SBC for the same project

alex7o29 minutes ago
Yes but also find a phone that is not top of the line and can be flashed with a custom ROM/kernel like linage OS, or Ubuntu touch, postmakret OS, then you can customize and have your pie and eat it too. Since you won't be needing the phone to have security for you banking stuff
noahnathan25about 1 hour ago
The goal of the Raspberry Pi was to have a SoC that could run Linux on a very cheap board, but that's no longer the case. There are cheaper options on the market today... and if you really need to use Linux... an old smartphone can be a testing solution. I also recently used a Xiaomi router (it has little internal memory) to run Linux (OpenWrt) and do some testing
HeyLaughingBoy19 minutes ago
[sigh] I've lost track of the number of times that I've suggested that instead of an ESP32 with small TFT screen for some web or BLE enabled project that doesn't require any I/O, you could just use a cheap phone or tablet and make life much easier. I'm downvoted every single time. I guess some people take pride in doing things the hard way.
hn3ufz62f7about 3 hours ago
Swapped a Pi for a used Dell micro in my closet rack and the thing I didn't expect to miss was GPIO, had to add a cheap Pico for the fan and sensors.
rbanffyabout 3 hours ago
If the Dell is old enough, you can use a printer port for some GPIO. Pretty trivial to use.
HeyLaughingBoy9 minutes ago
Memories. A long time ago I used to sell a little board that plugged into a printer port and added a power driver to the outputs and some buffering to the inputs so they were 12V-tolerant.

Forgot about that until you mentioned it.

iamnothereabout 3 hours ago
There are now cheap PCIe cards that provide 40-pin GPIO headers, check eBay. You might need an M.2 to PCIe riser if you don’t have a PCIe slot.
justin66about 3 hours ago
Why would anyone buy a Pi when they could simply burgle the home of a friend or neighbor and steal their computer?
serfabout 1 hour ago
good future HN headline.

my turn :

"2029: Using JEV to decide which bunker dweller is next on the menu."

RugnirVikingabout 3 hours ago
feels like a lot of money.

I suggest you get a jetson nano instead if youre doing robotics or anything serious with an RPI.

If you just want a cheap computer, you're probably better off with a second hand laptop, probably cheaper too

rbanffyabout 3 hours ago
I've been making clusters from decommissioned thin clients, but they are mostly for the sake of managing clusters, not any useful compute. The workloads are Hercules emulating a VM/370 with or without MVS, and various SimH emulations of vintage computers of various sizes.

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