SNS-GP2Y0A21YK0F is perfect gadget for your next project. It can measure distance from 10 to 80 cm and have analog output which you can read easily.
To participate in the Quiz is enough to Re-tweet the Twitter Quiz announcement message.
To double your chances you have to answer the Quiz question
Today we will post on Twitter our question.
You have time to re-tweet until Monday 28th of July.
In Monday we will count the correct answers and ask random.org to generate random number in range then announce the winner and ship the board by airmail.