How about cutting the lawn by remote control, sounds cool! Well it should be because this the real thing and although being slightly dangerous this has to be one of the coolest garden ideas around.

The RC Lawnmower has been built by a johndavid400 using stuff obtained from eBay and other places. Apart from a slight slip up during the initial testing phase when a lawnmower made a run from it.

This is what you need for the Lawnbot400:

(2) electric-wheelchair motors from ebay = $40 ea

(2) 12v marine deep cycle batteries – Walmart – $60 ea new (used batteries might work)

36″ pieces of 2″ angle-iron (2) and 1″ square-tubing (2) from Home Depot = $8 ea

36″ pieces of 1″ angle-iron (2) and 1″ flat steel bar (2) from Home Depot = $5 ea

(a lot) of nuts, bolts, washers, lock washers 3/8″ or 1/2″ with drill bit = $20

(2) caster wheels from Harbor Freight Tools = $14 ea

(2) drive wheels from Harbor Freight Tools = $8 ea

(36″) 5/8″ threaded rod with several 5/8″ nuts and washers from Home Depot = $8

(2) sprockets from Allelectronics = $5 ea

#25 roller chain and a few universal links from Allelectronics = $10 for 3′

sprockets from Electronics Goldmine = $1.50 ea

(24) mosfets from Digikey = $1 ea

(there were quite a few small parts for building the H-bridge, they are listed later on)

Source [Hack a Day]