Here’s another catch up post. Last week we built wireless controllers that would connect to a multiplayer pong game that Tom made. I used the Yun, and it was quite easy to use. I was able to access the terminal and use Telnet right from the Arduino IDE.

The push button on the far left made a connection or disconnection to the IP address that Tom provided. When it’s pressed, the yellow LED lights up. When the controller is connected, the white LED lights up. The two push buttons on the right printed “l” and “r”, which made the paddle in the game move left or right. They each corresponds to the green or the red LED lighting up.

Denny demoing the controller

February 18, 2015February 18, 2015 by fromjia

Circuit board etching: acid vs. vinegar

Circuit Design and Prototype

Last week we etched circuit boards in Circuit Design class. We had the choice of etching with acid or vinegar. My partner, Danara, chose acid while I tried with vinegar. Here’s what happened. The star design is Danara’s.

Printed our designs onto blue paper to be transferred onto the copper.

Soaking in water.

Danara’s board in acid. Mine in vinegar, with a dash of salt.

Danara’s board looked great, especially after it was tinted. Mine didn’t come out so well. womp womp

Vinegar took a lot longer. Because we had a couple of boards using the same container of vinegar, the residue from one board would float onto another board. Danara had her own container of acid, which did a super clean job. I may try again with vinegar, one day. For now, I’ll do over with acid.

February 17, 2015February 17, 2015 by fromjia