Is small size the only thing the A/A+ has over the B/B+ board? Is size really such a big issue for prototyping boards like the Raspberry Pi?
Is is also cheaper. And if don't need the internet conectivity and so many usb ports why use the B?
Raspberry Pi Model A+ Board
21–30 of 51 posts
Re: Raspberry Pi Model A+ Board
#22Is small size the only thing the A/A+ has over the B/B+ board? Is size really such a big issue for prototyping boards like the Raspberry Pi?
Model A consumes less power than B, because it doesn't have the ethernet chip or port, does not have an onboard USB hub, has a single USB port and has less RAM.
A flatter profile is an advantage, when trying to tuck it into those narrow altoid boxes along with other circuits and battery packs.
Re: Raspberry Pi Model A+ Board
#23Earlier quoted context omitted.
Been lurking for a bit. Was hoping to say hello with a constructive comment but I have to jump in here. I bought a Pi model B for my daughter. Nothing but terrible unreliability. Booting problems as you state, power problems with the USB ports, random hangs and crashes and problems getting half of the devices recommended to work. I kind of expected that for the money but the thing that really pissed me off was when I…
I assume you did get the constructive feedback that you need a proper 5V power source? Because it will boot with lower, but then randomly crash all the time.
Yes. I did a V-I curve of the wall wart and it was fine. I inspected the ripple under load with my scope too. I also had it hooked to a TTI bench PSU at 5.000v and it still had problems (I have a large selection of proper test gear at my disposal).
They didn't like those facts.
Re: Raspberry Pi Model A+ Board
#24I love the RPi and what it has done to introduce computing/programming/linux to more people. However I can't get past how unreliable booting from an SD card has been for me. I know reliability depends heavily on the SD card used and on the quality of board socket but I am disappointed that Rev 2 of the board did not come with the option of on-board flash.
Been lurking for a bit. Was hoping to say hello with a constructive comment but I have to jump in here. I bought a Pi model B for my daughter. Nothing but terrible unreliability. Booting problems as you state, power problems with the USB ports, random hangs and crashes and problems getting half of the devices recommended to work. I kind of expected that for the money but the thing that really pissed me off was when I…
Maybe you should look at exchanging your Pi for another one. Manufacturing defects are rare but can happen.
I've used dozens of Pi's and never had bad reliability problems. Always use a quality 1 amp or more power supply, good name brand SD card, never remove power without running shutdown command to halt card writes, and never plug or unplug USB devices while powered up (older model boards don't handle the voltage drop well). I have never seen a corrupted SD card when following those rules.
Re: Raspberry Pi Model A+ Board
#25I love the RPi and what it has done to introduce computing/programming/linux to more people. However I can't get past how unreliable booting from an SD card has been for me. I know reliability depends heavily on the SD card used and on the quality of board socket but I am disappointed that Rev 2 of the board did not come with the option of on-board flash.
On-board flash severely complicates the setup and recovery process: how do you get the OS in there> Also, strangely, it's more compact than almost all Flash packages of comparable capacity.
Re: Raspberry Pi Model A+ Board
#26Earlier quoted context omitted.
I assume you did get the constructive feedback that you need a proper 5V power source? Because it will boot with lower, but then randomly crash all the time.
Yes. I did a V-I curve of the wall wart and it was fine. I inspected the ripple under load with my scope too. I also had it hooked to a TTI bench PSU at 5.000v and it still had problems (I have a large selection of proper test gear at my disposal). They didn't like those facts.
Then you've got a dud. Lots of the first rev in particular had a few problems like this. That's ample evidence to exchange it for a new one.
The later revs, particularly the B+, seem much more reliable (although occasional duds definitely do still happen).
Re: Raspberry Pi Model A+ Board
#27Does anyone know of a Raspberry Pi type board (low cost, Linux capable, good hardware graphics) with HDMI input and output suitable for image processing?
Re: Raspberry Pi Model A+ Board
#28Earlier quoted context omitted.
brand of flash matters. before the raspi came along and popularized arm computing, there was a very lively scene around arm hacking out of existing devices. sheevaplug started the trend and people found that things like the seagate dockstar (a nas based hard drive dock) could be easily modified to boot a linux distro from usb and run as a low power headless server. we kept a list of results from our experiences of wh…
>sheevaplug started the trend Not to be pedantic, but before the Sheevaplug, there was the Linksys NSLU2, which came out in 2004: https://en.wikipedia.org/wiki/NSLU2 http://www.nslu2-linux.org/wiki/FAQ/FirmwareMatrix
Pedantry noted. It's probably better describing the SheevaPlug as the device that fostered the trend towards plug computing rather than the one that encouraged device hacking as my statement would imply. I mistakenly omitted the key detail that the Dockstar was a custom piece of hardware that was based on the SheevaPlug... Same SOC and features.
Re: Raspberry Pi Model A+ Board
#29Earlier quoted context omitted.
Have you made sure your power supply is reliable?
That's a good question. I haven't paid much attention to the power supply. I have a regulated (lab grade) power supply I am going to check if there are any changes when powered by it
There's a semi official wiki someplace that maintains a list of"confirmed" working power supplies and sd cards. One thing of value on that same wiki is instructions of how to test voltage on the pi board itself. On my phone now but I'm pretty sure the stuff I'm thinking of is on the elinux.org wiki.
Re: Raspberry Pi Model A+ Board
#30Earlier quoted context omitted.
Yes. I did a V-I curve of the wall wart and it was fine. I inspected the ripple under load with my scope too. I also had it hooked to a TTI bench PSU at 5.000v and it still had problems (I have a large selection of proper test gear at my disposal). They didn't like those facts.
Then you've got a dud. Lots of the first rev in particular had a few problems like this. That's ample evidence to exchange it for a new one. The later revs, particularly the B+, seem much more reliable (although occasional duds definitely do still happen).
Well you're probably right but after that face full, it went in the bin as i don't have the inclination to see if my time will be wasted again.