Raspberry Pi ADSB-IN - iFly General Discussions

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Raspberry Pi ADSB-IN

12/7/2015 11:08 PM

Jeff Clark

Joined: 9/20/2012

Posts: 1254

Re: Raspberry Pi ADSB-IN

This unpowered 4 port hub from the clearance shelf at Radio Shack. I stripped it down to just the board and its 3 inch USB connector. I then soldered 5v wires to the + & - on the hub, making it a powered hub. You can see it sitting on top of the Pi's USB ports. When power is applied to the Pi, a pin on the Pi activates the relay which powers the hub.

Jeff Nokomis Clark, Mooney M20G, iFly app on ASUS ZenPad Z8s, ASUS ZenFone AR, ASUS Windows 10 tablet, Stratux ADS-B w AHRS

12/8/2015 8:23 PM

Joined: 1/1/0001

Posts: 0

Re: Raspberry Pi ADSB-IN Modified By on 12/8/2015 9:54:44 PM

Jeff, I ordered a 4 port CarNetix powered hub from Amazon but now see that it requires 7 or more volts input. I was going to plug it into my 2 USB Power Drive 2 cigarette lighter socket but it only puts out 5 volts per side. I have my Raspberry Pi plugged into the other side. How can I get 7 (or more) volts for the hub and 5 volts for the Raspberry Pi from a single cigarette lighter socket? I don't plan to mount all of this together into one case. Thanks.

EDIT: I just thought about trying to power the Raspberry from one of the hubs USB ports. Each port puts out 5v at 0.5 amps. Is that enough for the Raspberry or does it need more amps? Remember, my 978 and 1090 receivers and antennas will be plugged into the USB hub which will be getting powered from the airplane's 12 volt source. I suppose I could also plug the WIFI device into the hub. So, the only thing plugged into the Raspberry will be power in and one USB data in from the hub.

If this would work, I could get a cigarette lighter adapter that would supply 7 or more volts directly to the USB hub.

12/8/2015 10:03 PM

Jeff Clark

Joined: 9/20/2012

Posts: 1254

Re: Raspberry Pi ADSB-IN Modified By Jeff Clark on 12/8/2015 10:05:22 PM

From looking at the Amazon site, you bought something different that what you thought. What you bought gets hard-wired into ship's power, 12-24v. It has an internal regulator so that even if ship's power drops to 7v during cranking or whatnot, the 4 ports will still have a steady 5v without fluctuation (this is the same behavior as the buck converter in mine above). Since you fly rentals, you can modify the power cord to be a cigarette plug type instead of being hard-wired and you're now portable. To use it, plug it in to ship's power and plug the USB cable that comes with it between the USB data connection on the hub and a USB connection on the Pi. Now you can put the Pi on the floor/seat in the shade, and plug the GPS and/or SDR(s) into the hub on the dash or wherever you choose to put it. Each port gets up to 500ma, so you might even be able to power the Pi from the hub and not need a 2nd power source for it. Since the Pi doesn't have to power anything but itself in this setup, 500ma may just be enough for it.

Haha, I just now saw your EDIT and I basically parroted the same thing.

Jeff Nokomis Clark, Mooney M20G, iFly app on ASUS ZenPad Z8s, ASUS ZenFone AR, ASUS Windows 10 tablet, Stratux ADS-B w AHRS

12/8/2015 10:19 PM

Joined: 1/1/0001

Posts: 0

Re: Raspberry Pi ADSB-IN Modified By on 12/8/2015 10:20:45 PM

Thanks. I knew exactly what I bought except that it requires 7 volts or more. I just had not figured out how to plug it into the 12v cigarette lighter socket. I made a device from an old IPad Mini magnetic case cover to stick my antennas on and lay it on the glare shield. I put the Raspberry Pi on the floor out of the sun. I'll see if 0.5 amps is enough for the Pi. If not, I'll purchase a cigarette lighter splitter of some sort. Thanks for your input. Oh yes, I use my IPad Mini 4 internal GPS.

Actually, this is all just for fun. I have a SkyGuard transceiver.

12/9/2015 1:19 PM

Joined: 1/1/0001

Posts: 0

Re: Raspberry Pi ADSB-IN

My powered USB hub is due to arrive Friday. I did some testing using my laptop's 2.0 USB port. If I unplug the Stratux ADS-B receivers, I get a solid red light with the Stratux plugged into the laptop's USB port. So, I think the powered hub will power the Stratux OK. I'll plug the ADS-B receivers and WIFI dongle into the hub also.

I purchased a 12v accessory plug with wire leads to connect to the powered hub. This should power the hub and Stratux from the airplane's 12v source. I think this is going to work pretty well. The only thing sitting in the sun on the glare shield will be the two antennas.

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