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invention

Grappler

by littleBits

Published on April 28, 2014

Be a NASA engineer by building this robotic space arm.

A grappler is on the end of the ISS Robot Arm and is used to grab onto objects in space – like astronauts! Pick up space objects at home by controlling the DC motor mechanism with a remote control and the remote trigger.

See pages 28-29 in the Space Kit booklet for more info.

How To Make It

STEP 1

Create the circuit shown in the image gallery.

STEP 2

Cut the bottom off of 2 plastic cups.

STEP 3

Cut three pieces of string the same length. Tape them to the inside of one cup.

STEP 4

Place the other cup over the cup with strings. Feed the strings up through the top of both cups. Tape them to the outside of the outer cup.

STEP 5

Trace wide end of cup on cardboard and cut out circle.

STEP 6

Cut the end off a craft stick and stick into motorMate.

STEP 7

Tape cardboard circle to inner cup and stick the craft stick in the hole.

STEP 8

Put the circuit on a ruler and use rubberbands to hold in place.

STEP 9

Place motorMate onto D-shaft of the motor.

STEP 10

Secure the outer cup to the ruler using wooden skewers and tape.

STEP 11

Use a household remote to control your grappler. This is similar to the arm that grabs onto moving vehicles in space!

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