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by Vince8134
Mon Sep 19, 2016 9:57 pm
Forum: Troubleshooting
Topic: Unstable/crashing I2C after a while on a RPi3
Replies: 6
Views: 2788

Re: Unstable/crashing I2C after a while on a RPi3

Thanks for the help ! i2c on pi is unreliable due to some devices needing/allowing clock stretching which the Pi doesn't support Workaround is defensive programming to not assume that read/write works and to repeat it until it does As a layman when it comes to electronic and programming, I didn't kn...
by Vince8134
Sat Sep 17, 2016 11:00 pm
Forum: Troubleshooting
Topic: Unstable/crashing I2C after a while on a RPi3
Replies: 6
Views: 2788

Unstable/crashing I2C after a while on a RPi3

Hello, I'm having really weird behaviours with i2c, which eventually crashes, on my RPi 3, Raspbian/Noobs (update, upgrade, dist-upgrade, rpi-update have been done). Any help would be greatly appreciated. Those are the devices that I theoretically have (sorry for the poor pics all along the post): h...
by Vince8134
Wed Aug 13, 2014 1:56 pm
Forum: Automation, sensing and robotics
Topic: Having a 8-channels relay working with ULN2803A and 5V
Replies: 23
Views: 16197

Re: Having a 8-channels relay working with ULN2803A and 5V

Hello,

Thank you for your answer. Ok for #2, but I won't have any opto-isolation in this case, will I ?
by Vince8134
Tue Aug 12, 2014 12:42 pm
Forum: Automation, sensing and robotics
Topic: Having a 8-channels relay working with ULN2803A and 5V
Replies: 23
Views: 16197

Having a 8-channels relay working with ULN2803A and 5V

Hey, I'm at the end of a project to monitor lighting, climate and several other devices in a chilled terrarium, but I'm stuck with troubles related to 8-channels 5V relay. I try to follow the advice read here ==> http://arduino-info.wikispaces.com/RelayIsolation and I ended up willing to use a ULN28...

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