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by tadcampagna
Wed May 15, 2019 11:24 am
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

Re: RPi high school lab. B+ issues. B no issues.

Yes. I thought for sure that would narrow it down, but with the crashing I have had some students jump to different machines. They have not yet turned those other machines to corruption.
by tadcampagna
Wed May 15, 2019 11:08 am
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

Re: RPi high school lab. B+ issues. B no issues.

I will try to under-clock.

I also posted somewhere else about going read-only with the sd cards and having students save all work to usb storage. This was suggested to reduce the impact of so many power cycles. Any thoughts?
by tadcampagna
Tue May 14, 2019 6:56 pm
Forum: General discussion
Topic: Read-only SD cards for school Lab?
Replies: 2
Views: 302

Read-only SD cards for school Lab?

We have a lot of issues with corrupted sd cards in our high school pi lab. A suggestion was to make all the sd cards read-only and save all work to a usb thumb drive. What does setting the sd cards to read-only do? Why might this have been suggested? The students only use the Pi's for Arduino and Py...
by tadcampagna
Tue May 14, 2019 3:12 pm
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

Re: RPi high school lab. B+ issues. B no issues.

I am still stuck with 5 erratic machines. I had them all working Friday of last week. New OS from NOOBS, no Arduino. They are all back down today.
by tadcampagna
Thu May 09, 2019 1:02 pm
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

Re: RPi high school lab. B+ issues. B no issues.

Could this also be a power consumption issue while using Arduino UNO? We are using the RPi's to code and run Arduino Programs. Could the Arduino cause these types of behaviors? For the most part our programs are simple and only powering a few LEDs or buzzers, but we do get some students programming ...
by tadcampagna
Mon May 06, 2019 12:52 pm
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

Re: RPi high school lab. B+ issues. B no issues.

Could our problem be the quality of SD card? Almost every machine is using Patriot 16GB Class 10 cards. Could our issue be the number of power cycles we go through per day? We start up/ shut down 2 times per day. I have tried switching cables, monitors, keyboards, mice.... Same issues
by tadcampagna
Mon Apr 29, 2019 2:35 pm
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

Re: RPi high school lab. B+ issues. B no issues.

I have moved two of the problematic B+'s and reinstalled the OS through the NOOBS screen on Thursday. They were running great after that fresh install. Friday one of them worked great, but the other would boot to a blank screen. Today again the same one that did work still runs, now the problem chil...
by tadcampagna
Thu Apr 25, 2019 12:37 pm
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

Re: RPi high school lab. B+ issues. B no issues.

The lab is an old PC lab. There are several different circuits in the room, and the troublesome machines are not all on the same one. Of the 5 only 2 are directly beside each other. They are all hooked to the wireless network here at the school. Not sure if there is any interference in the room. All...
by tadcampagna
Wed Apr 24, 2019 1:08 pm
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

Re: RPi high school lab. B+ issues. B no issues.

We are back at the same issue as the original post. I have switched the entire lab to the RPi brand power supplies. Since then we have not witnessed any lightning bolts on our screens. However we still have 5 RPi 3 B+ that are constantly acting out on a daily basis. Here is what they are doing at ti...
by tadcampagna
Fri Feb 08, 2019 11:27 am
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

Re: RPi high school lab. B+ issues. B no issues.

Thanks for all the info...

We use the RPi's to program our Arduino's. So at times we do use the usb to power the Arduino, but I notice the erratic behaviors with and without the Arduino plugged in.

Can anyone recommend a power supply that has been reliable for you.
by tadcampagna
Thu Feb 07, 2019 7:53 pm
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

Re: RPi high school lab. B+ issues. B no issues.

I will check the power supplies on the B+ models. I think they are all 2.5 A, but they are not official RPi. Which means if the school went with the cheaper power supplies (as they sometimes do) we may not be getting what we need.

Thanks
by tadcampagna
Thu Feb 07, 2019 4:36 pm
Forum: General discussion
Topic: RPi high school lab. B+ issues. B no issues.
Replies: 24
Views: 1592

RPi high school lab. B+ issues. B no issues.

We have an RPi lab in our high school. We have 18 machines set up. 8 RPi 3 B+ and 10 RPi 3 B models. The issue is with the B+ models. They seem to have very erratic behavior. They will freeze, or the desktop will disappear. Worst case they will become corrupt on some level, not allowing them to boot...

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