Worknight 2.18.2020

InvenTeam Worknight

Date: 2.18.2020
Location: Logan HS
Team members: Rebecca, Tommy, Sam, Will and Clara.
Goal: Go over alternate mechanical design and work on circuit boards and programming

We handed out the new t-shirts tonight and everyone seemed to like them.

Mr. Butterworth (Mechanical Engineer) offered an alternate solution to the pressure sensors we are working on now which included the use of a manometer. We will continue to work on the pressure sensor idea and test it and then determine if we need an to move in this direction. Rebecca worked with Mr. Butterworth on refining that concept.

Mr. Foye worked with Clara on how to use a DC power supply and tested out the circuit boards that we hastily soldered together today in order to test them tonight. We has some problems with the actual circuit board and soldered components connecting to it. It seemed we had to heat up those solder joints quite a while.

Bench testing went well with the circuit boards. We went slowly from 0 -7 V to test the regulator. It output a steady 5 V which is what we need. Then we applied a voltage to the transducer and it output the 2.5 V specified. We then blew into a piece of surgical tubing to test the sensor and it output a varied voltage which is what we want. One board is completed and tested and we went right to work on the other one which had a resistor problem.

The progress was very good on the circuit boards tonight. There was a concern if we could get them completed, but we only have one or two more solder connections on the second board to finish.

Tommy worked on a testing regiment for the sensors and found some interesting data. The sensor registered no difference when the vent was close or open on the top of the bag. When we get the other sensor up and running next week we should start to see a pressure difference.

Team members working with local engineering consultants on different parts of the project.

Mr. Foye and Clara working on bench testing the circuit boards.

Will and Tommy working on testing the lower sensor.