30kg Combat Robot That Costs Less Than $100

Why do robots with wheels and the idea of combat go together? It seems an interesting question that can give some psychological insight into the community of young hobbyists, but here’s a DIY that gives fascinating insights into the construction of a sturdy, bulky killing machine that weighs 30kg, charges at the enemy at 1 ft/sec speed, has about 2 hours of battery run time, but does not cost even $100.

To conjure this rugged machine, Instrutables user bjkayani not only used soldering machines and semiconductors, but hack saw, wood saw, drillers and wrenches. He employs Wiper motors but not before working on them. He used spade terminal connectors throughout and a basic switch and fuse for safety. For the motor controller, Servos with a mechanical H Bridge Switch Assembly are chosen. There are many designs bjKayani experiments with, but the design he settles for has a front wedge, with the caster wheels under the wedge not giving any pivot point. This helps in obtaining maximum traction.