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+--- Thread: My new Project (/thread-2689.html)
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My new Project - mmcghee - 06-03-2021
Hi Everybody,
I bought a raspberry pi during lockdown last year and i have had no idea what to do with it......so i have decided to create a custom head unit for my suzuki swift using Openauto pro.
So far i have my pi, a touchscreen and an external usb bluetooth dongle.
I am looking to add a DAC board for audio, a usb gps receiver, a usb mic, these will be connected via powered usb hub. I am also looking to add DAB but not too sure how to go about this yet.
I am confused though about powering it straight through the car for startup and shutdown. From what i can tell a couple of relays and a buck converter might be my best option but i'm not too sure.
Anyway I'm looking for ideas on the best way to utilise this and also any other cool additions that i could add.
Thanks for reading guys.
Michael
RE: New Project - Chrisfromwa - 06-03-2021
Take a look at this
https://bluewavestudio.io/community/showthread.php?tid=1815
I have one, and it really saves a lot of space.
RE: New Project - mmcghee - 06-03-2021
looks good, space was one of my biggest issues.
RE: New Project - Daniel_BlueWave - 06-04-2021
Welcome.
Power solutions can be found here:
https://bluewavestudio.io/community/forumdisplay.php?fid=91
This list of hardware could help you:
https://bluewavestudio.io/community/forumdisplay.php?fid=105
It is also good to have a look at other Users projects:
https://bluewavestudio.io/community/forumdisplay.php?fid=62
RE: New Project - GSPW - 06-04-2021
(06-03-2021, 03:45 PM)mmcghee Wrote: I am looking to add a DAC board for audio, a usb gps receiver, a usb mic, these will be connected via powered usb hub. I am also looking to add DAB but not too sure how to go about this yet.
Several members here have carried out projects involving RTL-SDR devices but be aware this requires lots of custom work.
RE: New Project - turbochris - 06-04-2021
I have this board with an 18650 cell. It can be configured to work directly off a single 12 volt switched feed! It will never drain your vehicle battery. I have one in my car, it works perfectly off a switched cigarette lighter. You can run it from a 3 amp 5 volt USB charger, send 12 volts through a modified fused usb cable to it's usb input port or just connect 12 volts to the solder pads inside.
Also- it's very important that we pay a little extra for something like this as it's 100% open source. It's very refined and very reliable. It uses the safest type of cell to provide the cleanest power as easily as possible.
https://lifepo4wered.com/lifepo4wered-pi+.html
RE: New Project - gecko242 - 06-06-2021
(06-04-2021, 01:51 PM)turbochris Wrote: I have this board with an 18650 cell. It can be configured to work directly off a single 12 volt switched feed! It will never drain your vehicle battery. I have one in my car, it works perfectly off a switched cigarette lighter. You can run it from a 3 amp 5 volt USB charger, send 12 volts through a modified fused usb cable to it's usb input port or just connect 12 volts to the solder pads inside.
Also- it's very important that we pay a little extra for something like this as it's 100% open source. It's very refined and very reliable. It uses the safest type of cell to provide the cleanest power as easily as possible.
https://lifepo4wered.com/lifepo4wered-pi+.html
I fail to see why you would need an additional battery? IMO this just poses a fire risk, burying a battery somewhere inside your very hot dashboard!
You can use the persistant 12V line from the car battery for almost all of your needs.
RE: New Project - turbochris - 06-08-2021
(06-06-2021, 04:54 PM)gecko242 Wrote:it uses 3.3 volt LiFe cells, no danger like lipo.(06-04-2021, 01:51 PM)turbochris Wrote: I have this board with an 18650 cell. It can be configured to work directly off a single 12 volt switched feed! It will never drain your vehicle battery. I have one in my car, it works perfectly off a switched cigarette lighter. You can run it from a 3 amp 5 volt USB charger, send 12 volts through a modified fused usb cable to it's usb input port or just connect 12 volts to the solder pads inside.
Also- it's very important that we pay a little extra for something like this as it's 100% open source. It's very refined and very reliable. It uses the safest type of cell to provide the cleanest power as easily as possible.
https://lifepo4wered.com/lifepo4wered-pi+.html
I fail to see why you would need an additional battery? IMO this just poses a fire risk, burying a battery somewhere inside your very hot dashboard!
You can use the persistant 12V line from the car battery for almost all of your needs.
i have to hook up one switched wire and get full auto control
it's isolated from vehicle voltage issues
you can do whatever you want, this is called a "tank battery" in this application. A known solution for automotive issues.
RE: New Project - gecko242 - 06-11-2021
(06-08-2021, 01:09 AM)turbochris Wrote:(06-06-2021, 04:54 PM)gecko242 Wrote:it uses 3.3 volt LiFe cells, no danger like lipo.(06-04-2021, 01:51 PM)turbochris Wrote: I have this board with an 18650 cell. It can be configured to work directly off a single 12 volt switched feed! It will never drain your vehicle battery. I have one in my car, it works perfectly off a switched cigarette lighter. You can run it from a 3 amp 5 volt USB charger, send 12 volts through a modified fused usb cable to it's usb input port or just connect 12 volts to the solder pads inside.
Also- it's very important that we pay a little extra for something like this as it's 100% open source. It's very refined and very reliable. It uses the safest type of cell to provide the cleanest power as easily as possible.
https://lifepo4wered.com/lifepo4wered-pi+.html
I fail to see why you would need an additional battery? IMO this just poses a fire risk, burying a battery somewhere inside your very hot dashboard!
You can use the persistant 12V line from the car battery for almost all of your needs.
i have to hook up one switched wire and get full auto control
it's isolated from vehicle voltage issues
you can do whatever you want, this is called a "tank battery" in this application. A known solution for automotive issues.
There is no such thing as "no danger". Yes LiFe is less prone to the violent fires that lipo can cause, but it is still a large store of chemical energy.
I am well aware of automotive power solutions, but typically this sort of system (or more often, large capacitors) are used in safety critical solutions, not bog standard infotainment.
My only point was that this is another layer of added complexity, which I would deem unnecessary. Automotive stereos have been doing just fine running from a persistant / switched 12V supply for years.
RE: My new Project - mmcghee - 07-09-2021
Thanks for the input guys,
I think i'm going to go down the road of using a 12 to 5v buck converter and a power management board to enable a safe shutdown.
My buck converter transfers 12v to 4 x 5v usb ports so this would give me enough to independently power the pi, screen and the usb hub.
Michael