On Tuesday, we met with Navid, and gave him the following updates.
- We will be filming our client while he answer our questions on Thursday
- the ramp is still in progress
- the components we bought on last Thursday
- we will be making the holes on the box for LCD, push button and the toggle switch at the machine shop
On the same day, we went to machine shop and asked Mark for a sheet of metal that we will be covering our platform. We decided not to bend the metal, as we don’t have the proper machine that is able to do this. Instead, we will be covering the side with other material. Therefore, Mark cut the metal with a size of 800mm*1200mm. This cost of metal will be charged to our Capstone financial account directly.
After we received our invoice for the platform we had made in the machine shop. The cost was $80 for 2.5 hours of work, which brings our running total to $618.65. This does not include the ramp we are having made, or the sheet of metal we purchased from the machine shop today, since we have not been charged for those items yet. We expect to be charged another $100 for them. We also estimate that we will need another $150 for miscellaneous items such as material to cover the sides of the scale, metal to cover the ramp, sideguards, etc. Therefore, we asked the department for budget extension.
On Thursday, we met with our client and film him while he answers the following questions:
- Please introduce yourself.
- Describe who Tetra is and what they do.
- Why did you suggest this project to UBC?
- How do you think not weighing yourself can affect your health?
On the same day, we received our PCB. So we started to test the PCB one part by one part, making sure there is no short circuit or mistake. We found one mistake regarding the size of the INA. The holes for INA are too far apart. So the INA IC wont able to fit in. We solved this mistake by stacking a “right size” socket to a bigger socket which can fit into the holes. We also soldered the socket for LCD, LCD driver, IDE, and regulator. In addition, we received a email respond from Professor Gopalakrishnan, asking for a list of the things we bought, and the things we are buying.
On Saturday, we tested the PCB with adapter, power button, INA, and the platform with the load cell, and it showed the signal has successfully being amplified. In addition, we started making our video. It is almost done. We still need to put our final product into the video. Our budget extension has approved by the department!!!