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by RazziaDK
Wed Feb 27, 2019 10:34 pm
Forum: General discussion
Topic: Best way to power 4 x Raspberry Pi
Replies: 31
Views: 1355

Re: Best way to power 4 x Raspberry Pi

Likewise, assuming the Pis are within a couple of meters of the supply, the hand-wringing about line losses are pretty irrelevant - use decent wires. The Raspberry Pi's will basically be stacked on top of the PSU, in a configuration similar to this one: https://www.thingiverse.com/thing:1897376 htt...
by RazziaDK
Wed Feb 27, 2019 9:23 pm
Forum: General discussion
Topic: Best way to power 4 x Raspberry Pi
Replies: 31
Views: 1355

Re: Best way to power 4 x Raspberry Pi

Hi, I would rather use a 12V power supply with cheap DC-DC converters for each Pi. Such rating currents at low voltages are never a good idea to deal with. How do I know how many amps a 12v PSU need to be, if I convert it to 5v? I have a 12V 5A somewhere around here that I don't use - would that be...
by RazziaDK
Tue Feb 26, 2019 10:09 pm
Forum: General discussion
Topic: Best way to power 4 x Raspberry Pi
Replies: 31
Views: 1355

Re: Best way to power 4 x Raspberry Pi

I am thinking about building a small cluster with 4 Raspberry Pi (3 b+), but I am not sure how to power them. I have looked at a few desktop chargers, but they claim to be able to provide 2.4A on some of the ports, and "up to 2.4A" depending on which device is connected. I am not convinced by this....
by RazziaDK
Tue Feb 26, 2019 9:52 pm
Forum: General discussion
Topic: Best way to power 4 x Raspberry Pi
Replies: 31
Views: 1355

Best way to power 4 x Raspberry Pi

I am thinking about building a small cluster with 4 Raspberry Pi (3 b+), but I am not sure how to power them. I have looked at a few desktop chargers, but they claim to be able to provide 2.4A on some of the ports, and "up to 2.4A" depending on which device is connected. I am not convinced by this. ...
by RazziaDK
Sat Dec 22, 2012 3:57 am
Forum: Automation, sensing and robotics
Topic: Connecting 1-wire temperature sensors to RPi ?
Replies: 11
Views: 16531

Re: Connecting 1-wire temperature sensors to RPi ?

If possible I would also like to connect a HD44780 4x20 LCD and have it displaying the current temperatures. From what I can find in my search, it should be a big problem connecting the display. But I'm starting to doubt the 1-wire sensors - if there is an easier (and fairly cheap) type of sensor th...
by RazziaDK
Sat Dec 22, 2012 3:13 am
Forum: Automation, sensing and robotics
Topic: Connecting 1-wire temperature sensors to RPi ?
Replies: 11
Views: 16531

Connecting 1-wire temperature sensors to RPi ?

I'm thinking of using one of my Raspberry Pi's to collect temperatures and show them on a munin-style graph. I have three of these 1-wire temperature sensors based on DS18B2 gathering dust around here somewhere - I would love to be able to use them. Can anyone tell me how I might connect them to my ...

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