I'm working on a quadcopter project using Motors/ESCs, an Arduino DUE and a Raspberry Pi.
I have 4 motors and 4 of these Opto ESCs.
At the moment I have the raspberry Pi plugged into the mains socket, with a USB connected to the Arduino to power it. I also have a 3S Lipo battery powering the ESC/Motors using one this power distribution board.
The red cable from the ESCs/Power distribution board isn't connected to anything.
What I'm wondering - is it possible to use this red cable to provide power to the raspberry pi in place of the mains so that the whole system would be powered by the Lipo battery.
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\$\begingroup\$ What is the current rating of the bec circuit? Is it cleanly 5v? The pi isn't really designed for battery power. \$\endgroup\$Chris Stratton– Chris Stratton2013年09月25日 13:33:44 +00:00Commented Sep 25, 2013 at 13:33
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\$\begingroup\$ My knowledge of the area is pretty limited, but I was under impression the Opto ESC didn't have a BEC circuit? \$\endgroup\$Ger– Ger2013年09月25日 13:40:31 +00:00Commented Sep 25, 2013 at 13:40
1 Answer 1
You need to ensure 5V @ 700mA according to the manufacturer.
And, Yes, you can power Raspi from batteries.
From Raspberry PI Faqs
Can I run power Raspberry Pi from batteries as well as from a wall socket?
Yes. The device should run off 4 x AA rechargeable cells, but there may be stability issues as the batteries lose their charge. Using 4 x AA Alkaline cells will result in 6v and it is therefore recommended to use a voltage regulator.
You could use this example too, that power with 3V3 and use a batteries.
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\$\begingroup\$ In the setup I've described, how would I ensure 5V at 1A? Also where would I actually connect this cable to? Can I connect it using the GPIO pins? buyraspberrypi.com.au/wp-content/uploads/2012/10/GPIO.jpeg \$\endgroup\$Ger– Ger2013年09月25日 14:06:28 +00:00Commented Sep 25, 2013 at 14:06
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\$\begingroup\$ @Ger The best thing that you could do to connect is making a MicroUSB cable from your circuit, and power normally the Raspi. About to ensure the tension you should use a Regulator like a LM7805 to ensure 5V and 1A. \$\endgroup\$Butzke– Butzke2013年09月25日 14:12:41 +00:00Commented Sep 25, 2013 at 14:12
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\$\begingroup\$ You can power the pi from batteries, but it is not designed for that and is missing most of the features you'd expect from a battery powered system - most obviously but not only the lack of either power saving modes or an expectation of being turned on and off frequently. \$\endgroup\$Chris Stratton– Chris Stratton2013年09月25日 14:13:58 +00:00Commented Sep 25, 2013 at 14:13
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\$\begingroup\$ @Ger take a look at the example that I added. \$\endgroup\$Butzke– Butzke2013年09月25日 14:29:07 +00:00Commented Sep 25, 2013 at 14:29
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\$\begingroup\$ Thanks for this, I might look into a simpler approach, maybe a separate rechargeable USB pack of some sort to power the RPi via the micro USB. \$\endgroup\$Ger– Ger2013年09月25日 15:03:54 +00:00Commented Sep 25, 2013 at 15:03
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