# I want to build bluerov2 but full diy .need help **URL:** \ **Category:** Build/Make\ **Created:** [June 24, 2018, 1:35pm UTC](https://discuss.bluerobotics.com/t/i-want-to-build-bluerov2-but-full-diy-need-help/2843 "2018-06-24T13:35:58Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![uzio](https://avatars.discourse-cdn.com/v4/letter/u/3be4f8/32.png) [@uzio](https://discuss.bluerobotics.com/u/uzio)\ **Post date:** [June 24, 2018, 1:35pm UTC](https://discuss.bluerobotics.com/t/i-want-to-build-bluerov2-but-full-diy-need-help/2843/1 "2018-06-24T13:35:58Z")
i find 3d modell of blurav v2 on grabcad and want to build one like that 3d print in petg or abs,or laser cut i want to ask did i figured out electronic part right ? 1st rpi3 i need to load image fro bluerov site then pixhawk (ph) load ardusub fw need 2 x thrust commander (tc) to connect pair of brusheles motors with car rc esc and fathom-s teter video interface card to connnect cat5 and battery (have 3 brand new 5000-3s-20c lipos) on board so i connect : cat5 to Slip Ring Slip Ring -cat5 to fathom fathom to ph 2 tc to 4 esc to 4 motors ph to 2 tc rpi3 to ph camera to rpi3 and last battery to esc and 2x tc camera (sj4000) then tether to tube with cam dome like this [http://www.homebuiltrovs.com/howtosealingwireexits.html](http://www.homebuiltrovs.com/howtosealingwireexits.html) will it work like this ? ---
**Author:** ![kklemens](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/kklemens/32/2247_2.png) [@kklemens](https://discuss.bluerobotics.com/u/kklemens)\ **Post date:** [June 24, 2018, 7:14pm UTC](https://discuss.bluerobotics.com/t/i-want-to-build-bluerov2-but-full-diy-need-help/2843/2 "2018-06-24T19:14:10Z")
Hi @uzio, Apologies, but your design set-up is a little hard to follow. Would you mind drawing it out? The Fathom-S and Thruster Commander(s) are not needed if you have a Pixhawk and a Raspberry Pi. Here is what you will need at a minimum: [ArduSub Hardware Components](https://www.ardusub.com/hardware/components.html) We also have BlueROV2 specific [connection diagrams](http://docs.bluerobotics.com/brov2/operation/#connection-diagrams) if you would like to make something based on the same component architecture. ---
**Author:** ![uzio](https://avatars.discourse-cdn.com/v4/letter/u/3be4f8/32.png) [@uzio](https://discuss.bluerobotics.com/u/uzio)\ **Post date:** [June 24, 2018, 10:26pm UTC](https://discuss.bluerobotics.com/t/i-want-to-build-bluerov2-but-full-diy-need-help/2843/3 "2018-06-24T22:26:47Z")
i see that blueprint and [ardusub.com](http://ardusub.com) /images/hardware-diagram.png and i figured out that i need fathom-s or x to be tether link over cat5 to pc even on blueprint it say fathom x on no red wire bec and old red wire bec blueprints but ok i dont need these , even better πŸ™‚ thanks πŸ™‚ so beside pixhawk, rpi3b ,sj4000 cam and batterys i have i need ubec to power rpi3, 6 esc with motors ,cat5 cable,slip ring,couple el strip connectors ,14 and 24 gauge wire to connect all,have pixhawk connectors hmm what else oh yea u3 πŸ™‚ can u tell what are u3 on blueprints ? is this u3 power module > **[HKPilot Mega 10s Power Module With XT60 Connectors](https://hobbyking.com/en_us/hkpilot-mega-10s-power-module-with-xt60-connectors.html)** > > HKPilot Mega 10s Power Module With XT60 Connectors ?? and now without fathom board i just connect cat5 directly in to rpi3 ? and all connect like this [ardusub.com/images/hardware-diagram.png](http://ardusub.com/images/hardware-diagram.png) ignore fathom --and to connect cat5 wire directly to lan socket on rpi3 ? and isolate like that link i post before is it better now ? motors turnigy-aerodrive-dst-700-brushless-outrunner-motor-700kv.html esc hobbykingr-tm-brushless-car-esc-30a-w-reverse.html with hobbykingr-tm-programming-card-for-car-esc.html u3 if i’m right hkpilot-mega-10s-power-module-with-xt60-connectors.html ubec for rpi3 power hobbykingtm-hku5-5v-5a-ubec.html then uart connector on 2,4,6 6 is black on rpi3 can i use this for light ?? powerful-searchlight-with-built-in-pan-tilt-and-remote-light-mode-switching.html just isolate in printed case with epoxy ?? all links on hobbyking anything i miss ?? and thanks for help ---
**Author:** ![kklemens](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/kklemens/32/2247_2.png) [@kklemens](https://discuss.bluerobotics.com/u/kklemens)\ **Post date:** [June 25, 2018, 1:25am UTC](https://discuss.bluerobotics.com/t/i-want-to-build-bluerov2-but-full-diy-need-help/2843/4 "2018-06-25T01:25:13Z")
The [Fathom-S](https://bluerobotics.com/store/electronics/fathom-s-r1/) and the [Fathom-X](https://bluerobotics.com/store/electronics/fathom-x-r1/) are two separate products. you mentioned the Fathom-S in your first post and that is incompatible with the Raspberry Pi. If you are using a Raspberry Pi over distances over 100m, then you will need the Fathom-X. If you are working at distances of less than 100m, you may instead use the Fathom-E with standard tether (Slim tether will not work). U3 is [this power module](https://store.mrobotics.io/product-p/classic-bec10-mr.htm). We haven’t tried any of the Hobby King components. Here’s the communications connection line: Pixhawk β†’ Raspberry Pi β†’ Fathom-X (or Fathom-E) β†’ Tether β†’ Fathom-X (or Fathom-E) β†’ Topside Computer ---
**Author:** ![uzio](https://avatars.discourse-cdn.com/v4/letter/u/3be4f8/32.png) [@uzio](https://discuss.bluerobotics.com/u/uzio)\ **Post date:** [June 25, 2018, 5:57am UTC](https://discuss.bluerobotics.com/t/i-want-to-build-bluerov2-but-full-diy-need-help/2843/5 "2018-06-25T05:57:08Z")
big thanks for help πŸ˜ƒ i have 2 of these u3 modules ,one from pixhawk 2 pack and second i bought cause description on pix pack say sensor module not bec which is same πŸ™‚ ok will order fathom-e onlywant to explore river and 2 small lakes ,wont even need 100m thanks again