Antenna Feeler

Since the Mini Sumo rules only require the robot to fit within the 10 cm x 10 cm tube at start time, I decided to try adding antenna feelers to give my all Lego bot an advantage.

Bottom View

Since the antenna adds a fair amount of weight, I needed a light weight base. The Lego Vision Command expansion set comes with a couple of interesting clear rectangular pieces which I used in this design. Bigger...

Frame

This is the basic frame. The gap in the front is where the light sensor goes. Bigger...

Frame with Tires

The tires have been added. Bigger...

Assembled Base

This is the fully assembled base. Bigger...

Antenna Feelers

This is the antenna feeler unit, which attaches to the top of the RCX. It basically has two long feelers which are held against the switches using an elastice (a Lego elastic). When the feeler runs into something it moves away from the switch. Bigger...

Antenna Feeler Side View

View from the side. Bigger...

Antenna Feeler Front View

View from the front. Bigger...

Antenna Feeler Side View

View from the other side. Bigger...

Mounted Antenna Feelers

Here we see the antenna feelers mounted on the base. Bigger...

Starting Position

This is the starting position. With the antenna feelers in this position the bot still only occupies a 10 cm x 10 cm square. Bigger...

Starting Position

From the other side. The back of the bot in on the right. At start time, the bot backs up, which kicks the feeler out. This causes the top portion to fall down, making the antenna's horizontal. At this point they're no longer held in by the inverted L piece (seen about mid-feeler) and the elastics cause the feelers to snap into position. Bigger...

Starting Position Rear View

Rear view while in the starting position. The feeler snugs in between the tire and the gear, and friction holds it in place. Bigger...

Feelers Deployed

Here we see the feelers in their fully deployed position. Bigger...

Feelers Deployed Front View

Front View with the feelers deployed. Bigger...


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Copyright 2006 by Dave Hylands