DOOR-LOCK is electromagnetic door lock working with 12V DC.
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
The question is simple: Which PCB trace routing is best for high speed digital signals? A – B – C and why?
You have time to re-tweet and/or answer until Monday 2nd of November.
In Monday we will post the correct answer and ask random.org to generate random number in range then announce the winner and ship the board by post/airmail.