Recorder Problem Solving

During the tests run in the previous lab, it was found that the quality of sound was poor, screechy like child learning the recorder and not an instrument fit for a symphony. The first proposed solution was changing the air pressure released from air compressor, however after this failed to solve the problem, we moved on to investigating the seal of the solenoids over the holes of the recorder. This led us to use foam earplugs instead of the original rubber stoppers to ensure a better seal over the holes.

Week 9

Weekly Objective - This week is the dress rehearsal and final symphony performance. The construction and algorithm are complete so now the only thing left to do is test and ensure that the recorder works cohesively with the MIDI and the other instruments.  

Design Lab

In lab today our instrument was checked by our advisors to ensure that it was fit to be a part of the final performance. Emily and our advisors made sure that our instrument was compatible with the master code and Kevin fixed some minor problems with the air supply system that were causing some squeaking.  Jessica began working on the outline for the final presentation and Allie updated the blog with all the progress we’ve made in the past week.

Arduino Programming

Last week every group was given code to use that will allow the main computer to communicate with each instrument. We worked closely with our lab instructor and TAs to cater this code to the recorder and the way it uniquely functions. Essentially the the code works is that the main computer sends a midi note and note duration to an instrument. For each midi note, a combination of the recorders solenoids will turn on or off for a duration. When that duration is over the pneumatic solenoid will turn off and no sound in the recorder will play because there will be no air supply.

Frame Construction

Today Kevin, Jessica and Allie Spent the afternoon and evening completing the frame construction. First, two semicircular divets were sanded into the wood in order to lower the recorder to the same level as the solenoids on the sheet metal. This allows for the solenoids to reach the recorder holes. The recorder was then secured to the frame using bent hose clamps. Finally, the solenoid, relay board and arduino then attached to the sheet metal using steel epoxy. Tomorrow the wires will all be reconnected and soldered. The final prototype will then be ready for final program testing and troubleshooting before Wednesday. 

Week 8

Weekly Objective - This week we are finishing the construction and soldering of the final product. By Wednesday's design lab we will have our deliverable for fine tuning and a final audition. The robot's mechanical function and program must work by the end of lab in order to participate in the robot symphony next Friday.