Jon's Place

Friday, August 1, 2014

NanoSeeker - New Board

I've been working over the past couple weeks on the design of the new board for NanoSeeker, and its done now, and sent off to SeeedStudio for manufacturing.

Here's the schematic:

NanoSeeker v2.0 Schematic
The layout was difficult, because the board is only 26mm wide:

NanoSeeker v2.0 PCB - Top & Bottom

NanoSeeker v2.0 PCB - Top Only
The board is going to be done in yellow, which I think is a nice color for an underwater vehicle. Since the shell is clear, it will all be on display. I'm having a surface mount stencil made by OSH Stencils.

I'm again using one of the awesome Pololu 3.3 volt switching up/down voltage regulators to provide power for everything, from the 180 mAh 7.4 volt Lipo battery.

While I'm waiting for the new board to arrive (will be ~4 weeks), I'll work on getting some of the mechanical parts together (dive plane/rudder plus linear actuators), as well as getting started on some of the software that will be needed on the sub.

2 Comments:

  • Hey Jon, I saw your nanoseeker on hackaday and i noticed that you added bluetooth for a remote control. I'm curious as to how well the bluetooth works underwater as water is an excellent low pass filter. I am doing a similar project, trying to transmit data underwater, and I seem to find that any signal over several kHz doesn't seem to pass through the medium. I am currently experimenting with old school Bell 202 modems attached to a blackfin transmitter and receiver with fairly good results. The only downfall is the slow baud rates. Please send any advice/comments, its always appreciated.

    By Blogger Reuben Visser, At October 26, 2014 at 12:22 AM  

  • Reuben - bluetooth doesn't work at all under water - the BT module is so I can talk to the sub while it is on the bench, but still sealed. I can pull log files, push new scripts, all without having to crack the seal.

    By Blogger Jon Hylands, At October 26, 2014 at 5:01 PM  

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