SNS-IR-3-80 is adjustable infrared proximity switch. You can change sensitivity with potentiometer and it’s very easy to embed in your next project.
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 15th of September.
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.