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NCSU-CHAZ / BYO-Hydrographic-RV

A wiki for building your own hydrographic surveying vessel using a personal watercraft
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Order the main dry box and internal components #2

Open anardek opened 2 years ago

anardek commented 2 years ago

Decide on which LinQ box we want for the main laptop and battery. Needs to be:

anardek commented 2 years ago

For the laptop, we will also need:

hkmccraw commented 2 years ago

@anardek @bwebb-southal here is some info I have compiled on cappuccino PCs. Our options are dependent on how many LAN ports we need--both options below have two. Both are the same size but the more expensive option has two removable SD card slots as opposed to internal slots on the cheaper option.

Cappuccino PC:   

Cheaper Option: https://www.cappuccinopc.com/Mini-PC/echo-246f-Embedded-Fanless-Mini-PC-with-i7-CoffeeLake-and-Dual-NIC.asp  More expensive option: https://www.cappuccinopc.com/Industrial-PC/Echo246F-PoE-fanless-mini-pc-with-4-PoE-Ports-and-3-SIM-Slots.asp  

image

hkmccraw commented 2 years ago

Here is a battery option for the dry box: https://dakotalithium.com/product/dakota-lithium-12v-12ah-18-amp-hour-lifepo4-iron-phosphate-battery/

anardek commented 2 years ago

Notes from call with Brett:

anardek commented 2 years ago

@bwebb-southal -- we measured out the space we will need in the dry box and the LinQ boxes we ordered won't work. We are trying to decide if we should get a waterproof pelican and add the LinQ clips to the bottom or just use the cooler we currently have with the clips (plenty of space but only water resistant; we will of course need to drill through it for the cords). What are your thoughts? I feel like attaching the LinQ connectors to the Pelican will probably make the Pelican less waterproof anyway....

bwebb-southal commented 2 years ago

@anardek -- just my opinion, but I would avoid using the cooler. It is much easier to waterproof small holes as opposed to ensuring the water tightness of the cooler lid, which you will need to use frequently for accessing the internal components. You'll need to drill holes in the Pelican box anyhow for the cable bulkhead connectors, but they are very easy to seal with an adhesive+sealant like 5200 or similar. Same goes for the LinQ clips.

anardek commented 1 year ago

@anardek @bwebb-southal here is some info I have compiled on cappuccino PCs. Our options are dependent on how many LAN ports we need--both options below have two. Both are the same size but the more expensive option has two removable SD card slots as opposed to internal slots on the cheaper option.

Cappuccino PC:   

Cheaper Option: https://www.cappuccinopc.com/Mini-PC/echo-246f-Embedded-Fanless-Mini-PC-with-i7-CoffeeLake-and-Dual-NIC.asp  More expensive option: https://www.cappuccinopc.com/Industrial-PC/Echo246F-PoE-fanless-mini-pc-with-4-PoE-Ports-and-3-SIM-Slots.asp  

image

Just a note for dummies: buy the option with the Windows OS (not Linux)

anardek commented 1 year ago

Notes from call with Brett:

  • need more than 1 battery wired in parallel (lithium); will just need to fit in the dry box dakota lithium)
  • for cappuccino pc, just make sure it is fanless, 4-6 usb inputs, that the VGA cable is compatible with the touchscreen (i.e., need to choose a touchscreen first, see the emailed quote from Bret)
  • screen: can send the cables to vartech and have them splice for us -- this sounded complicated but less complicated than doing ourselves Vartech screen
  • look into buying the LinQ accessories directly and drilling them into the dry box
  • for display cables: subcon or impulse

I think my notes were wrong. Just one 18 Ah Lithium Ion battery.

bwebb-southal commented 1 year ago

@anardek @bwebb-southal here is some info I have compiled on cappuccino PCs. Our options are dependent on how many LAN ports we need--both options below have two. Both are the same size but the more expensive option has two removable SD card slots as opposed to internal slots on the cheaper option. Cappuccino PC:    Cheaper Option: https://www.cappuccinopc.com/Mini-PC/echo-246f-Embedded-Fanless-Mini-PC-with-i7-CoffeeLake-and-Dual-NIC.asp  More expensive option: https://www.cappuccinopc.com/Industrial-PC/Echo246F-PoE-fanless-mini-pc-with-4-PoE-Ports-and-3-SIM-Slots.asp   image

Just a note for dummies: buy the option with the Windows OS (not Linux)

Oh no! I actually made that mistake (but in reverse) on the purchase of a $35k supercomputer so you are in good company!

bwebb-southal commented 1 year ago

Notes from call with Brett:

  • need more than 1 battery wired in parallel (lithium); will just need to fit in the dry box dakota lithium)
  • for cappuccino pc, just make sure it is fanless, 4-6 usb inputs, that the VGA cable is compatible with the touchscreen (i.e., need to choose a touchscreen first, see the emailed quote from Bret)
  • screen: can send the cables to vartech and have them splice for us -- this sounded complicated but less complicated than doing ourselves Vartech screen
  • look into buying the LinQ accessories directly and drilling them into the dry box
  • for display cables: subcon or impulse

I think my notes were wrong. Just one 18 Ah Lithium Ion battery.

No, we do use two 18ah batteries wired in parallel to give us 12VDC and 36ah of capacity. Look at the amperage draw rate on the display and the computer. The display sucks down a lot of current. You might be able to get away with only one, but I’d suggest running the numbers to make sure.

anardek commented 1 year ago

Notes from call with Brett:

  • need more than 1 battery wired in parallel (lithium); will just need to fit in the dry box dakota lithium)
  • for cappuccino pc, just make sure it is fanless, 4-6 usb inputs, that the VGA cable is compatible with the touchscreen (i.e., need to choose a touchscreen first, see the emailed quote from Bret)
  • screen: can send the cables to vartech and have them splice for us -- this sounded complicated but less complicated than doing ourselves Vartech screen
  • look into buying the LinQ accessories directly and drilling them into the dry box
  • for display cables: subcon or impulse

I think my notes were wrong. Just one 18 Ah Lithium Ion battery.

No, we do use two 18ah batteries wired in parallel to give us 12VDC and 36ah of capacity. Look at the amperage draw rate on the display and the computer. The display sucks down a lot of current. You might be able to get away with only one, but I’d suggest running the numbers to make sure.

Ok - got it. Fortunately, I ordered 2 for testing. Phew!

grimesdj commented 1 year ago

@bwebb-southal

We're putting together an order for the bulkhead fittings and connectors for the touchscreen's power/video/usb. The power is pretty standard, and a video cable connector was supplied by the manufacturer, however I'm having trouble sourcing a USB specific bulkhead fitting and field serviceable cable connector (i.e., to attached to our cable which has a lemo connector on the touchscreen side). I saw that you used a subConn round connector.

Did you have any issues with electrical interference from the unshielded wires between the bulkhead fitting and the computer? Do you do something fancy inside the box--other than splicing the bulkhead stubs into another usb cable?

Thanks, D

bwebb-southal commented 1 year ago

Nope, nothing magical about this one. I believe we used a 4-pin SubConn connector as the USB touch interface was only using 4 wires. We cut the end off and marked the wires, then used a continuity checker to ensure that we had the correct wires connected to one another from end-to-end. We did not do anything fancy inside the box... we just used the end of the USB that we had snipped off and soldered that to the leads coming from the back of the bulkhead connector.