Team1. Progress Report1 Team Members Nathan Allen Gingery Samuel Joseph Davis Ki Yong Kwon Bryan David Thomas Feng Yu Facilitator Dr. Terence Brown The project was going smoothly as we had planed over the past weeks. There were some delays and unexpected problems, but we have managed to solve them. There are four main aspects of progress report. Circuit We are currently constructing a prototype of the base and remote circuits on protoboards. We have hooked up and tested the PIC, wireless chip, and voltage regulator. We are currently working on getting a 7-segment display to show the current channel of the wireless chip. We also have done problem shooting of a couple errors. When those errors are resolved, we will implement a system that will allow a user to change the channel with a push of a button. The last step will be hooking up the buzzer circuit to the PIC. We are going to use last years circuit so it will be able to connect to a pin that outputs a square wave at the frequency we want it to buzz. Programming Over the past few weeks, our progress in programming the bases and remote has been significant. We have been able to implement the following functions: - Communication with the XBee module - Programming the XBee module from the PIC processor - Operating the SSD (Seven Segment Display) - Using the 40 MHz oscillator We had originally planned to possibly do most of the programming in assembly language. However, since we had experience in lab regarding programming in C, we decided to stick with C. A major accomplishment of the last few weeks regarding programming has been the implementation of communications with the Xbee. Being able to seamlessly interface with the wireless module allows us to treat it as another component of the microcontroller. The biggest challenge in getting the Xbee to communicate with the microcontroller was getting the baud rates to match. Although not terribly complicated, we needed to use the provided formula in the PIC datasheet to calculate a constant which we fed to a function which gave us the correct baud rate (9600). Further progress should be made within the next few weeks to the point where the code is completely done. This will give us more time to focus on the packaging, an area which we don’t have as much experience with. Package Body: We had a meeting with the sponsor Mr. Blosser, and he gave us feedback of the final proposal and suggestions for the project. He recommended using a discharge hose rather than using a bulk fabric for the body of the base. We could not contact coated PVC fabric manufacturers, because they only sell massive amounts of materials for industrial purposes. If we use the discharge hose, we only need to sew the top and bottom part of the body. There is a local retailer, so we could get samples easily. We went to the retailer (Cathy co.) to check the real product. The product came in several different diameters and we got samples of each. After the team discussion we decided to get an 8 inch diameter discharge hose. The hose costs $6.17 per ft. Total amount of length we need is maximum 10 ft for two columns. Total cost will be $61.70. We have already ordered the hose, and we will find a valve for the body. There is a problem using discharge hose. The thickness of the discharge hose is 0.1 inch which is too thick to use a regular sewing machine. We also have to make sure that seams are airtight. So we came up with an idea to ask for help from an expert. We went to a local shoe repair shop, and they were able to help the sewing problem. It will cost $30 per column. Since we need two columns, total cost will be $60 for the labor. Base: For the base part, we decided to use the form from the original base. We checked a couple of local stores such as Joann Fabrics and Michaels. We could not find exactly the same material as the original, but we found two different foams which would be suitable for our purpose. One is softer than the original material. We need three pieces to make one base and the price of each piece is about $6.50. Total cost for two bases will be $39.00. Another material costs $58.99 for one piece with dimension 3''x24''x90''. We just need one piece of this to make two bases. Since two materials have different firmness, further discussion will be needed. Budget We have spent $83 for components and $61.7 for the discharge hose. Total cost is $144.70 out of $500. We are in good shape in terms of budget. Even though there would be major spending on sewing and base material in a couple of weeks, it should not exceed our budget.