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Lawn Dog Robotic Lawn mower

Open build , Solar Charged , robotic or RC lawn mower with interchangeable attachments for leaves , trash , edging , weed eating and more.

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Lawn Dog is an electric / robotic solar charged lawn mower project that evolved from my first robot lawn mower. Lawn Dog however can reach into ditches which is awesome . The new setup allows for a variety of attachments. A solar panel charges batteries during the day but can be charged by normal 110v outlet if needed It takes 2-3 days to charge by solar, which is fine.

The main goal is to make a product that is both versatile and useful outdoors. Lawn work is not always easy and many people have trouble if they have physical impairments , advanced age or sensitivity to outdoor heat or sunlight. Lawn dog is a work horse that takes the difficulty out of property maintenance and is also good for the environment!

I have additional attachments in the works like...

Leaf and trash recovery ( made from a modified electric sweeper)

Spiked aeration turf roller

Fertilizer/ seed spender

22 inch rolling magnet picks up screws, nails and more after projects.


  • 1 × jazzy select wheelchair base
  • 1 × Ryobi 40 volt electric mower
  • 2 × 12v batteries
  • 1 × 24v to 40 volt boost converter
  • 1 × 1/2" threaded rod

View all 17 components

  • Spiked solid rubber tires gives super grip

    Josh Starnes03/30/2018 at 14:38 1 comment

    I used a box of 100 screws and drive them into the solid rubber tire, the screws seemed to work really well at holding grip. I may consider moving to a all rubber tractor tire , but this is working fine. The screw heads stick out .5 inches. I will clean them off and coat the tire and screws with a thick coat of liquid rubber from plastidip so I can keep them from scratching the driveway and also have matching black wheels / tires.  This guy also needs a paint job !!

  • Maiden voyage, first time cutting grass RC

    Josh Starnes03/30/2018 at 14:31 0 comments

    First time out in the yard with high grass, I immediately noticed that the wheels are too slippery to keep any grip. I will try some other options to get good grip on the soil without damaging the yard.

    This is controlled in RC mode there.

  • Adding electronics

    Josh Starnes03/30/2018 at 14:22 0 comments

    Sabertooth 2 x 12 motor controller to power the motors from two 24 volt lawn and garden batteries..

  • Front wheels swapped to omniwheels

    Josh Starnes03/30/2018 at 14:18 2 comments

    These are 8 inch omniwheels, two meshed together I found online, andymart.com

    I had to tap on bearings on the original axle the mowers wheels came off of. Two bearings support one wheel. one inner and one outer with a bold on the outside.

  • First movement test

    Josh Starnes03/30/2018 at 14:14 0 comments

    The Jazzy and the mower are together for the first time. I had an initial movement test and took a video.

  • making a flex bracket to connect the mower

    Josh Starnes03/30/2018 at 13:52 0 comments

  • Cutting down the jazzy power chair chassis

    Josh Starnes03/30/2018 at 13:49 0 comments

    The jazzy has a lot of parts I wont need, like the stalk on the top for example. I want to do something to get more grippy wheels as well. In this picture I removed the center post that bolted in.

  • Remove the wheels and add an axle

    Josh Starnes03/30/2018 at 13:33 0 comments

    Ok so I picked up some hardware. 1/2" steel zinc threaded rod , nuts, wing nuts and lock nuts. Should be able to basically slide the shaft in or out by unscrewing a wing nut when done. I removed the original axle and it appears to fit in fine.

    Next I need to pull out the grinder and cut away the center post that is in the way and drill out all the holes the shaft will slide through to 1/2"

  • Posted at 8/22/2017 7:16:38 PM

    Josh Starnes03/30/2018 at 13:30 0 comments

    started stripping down the jazzy and removing brackets , wires and controller that will not be used, it has a circuit breaker set for 30 amps , hmm I wonder if I will leave it in, 15 amps max per battery is not a very high ceiling.

    Anyways as always feedback is welcome

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Josh Starnes wrote 04/21/2018 at 19:19 point

Another Idea is a Rolling magnet attachment that picks up loose nails and screws that could injure kids, animals and puncture tires.

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Josh Starnes wrote 04/21/2018 at 19:10 point

I have attachments for small brush, leaves and garbage collection. A second attachment I am making for spearing seed, fertilizer and aeration of soil.

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Josh Starnes wrote 03/30/2018 at 15:03 point

I have loaded a few details, enjoy !

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Josh Starnes wrote 03/30/2018 at 04:19 point

so far I have mulching and leaf removal, I also want to setup a aerator spiked drum roller and inside that roller it would be hollow with holes to spread fertilizer.  I tried to do a electric weed eater but both the electric weed eaters I bought died a horrible death , but I  still have that idea in the back of my head.

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cmduarte wrote 03/29/2018 at 16:59 point

I'd love to see the project details.  I am contemplating something similar, maybe with plug in attachments for edging and brush removal.

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